diff --git a/scripts/build_non_orchestral.py b/scripts/build_non_orchestral.py
new file mode 100644
index 0000000..81553b5
--- /dev/null
+++ b/scripts/build_non_orchestral.py
@@ -0,0 +1,563 @@
+#!/usr/bin/env python3
+"""Build non-orchestral factory instrument presets.
+
+Sources:
+  - Acoustic Guitar: University of Iowa MIS (unrestricted license)
+  - Bass Guitar: Karoryfer Growlybass CC0 (public domain)
+  - Drum Kit: Salamander Drumkit (public domain)
+
+Usage:
+    python3 scripts/build_non_orchestral.py
+    # or with anaconda (needed for aubio):
+    ~/anaconda3/bin/python3 scripts/build_non_orchestral.py
+"""
+
+import json
+import os
+import re
+import subprocess
+import sys
+from pathlib import Path
+
+# Try to import aubio (needed for guitar splitting)
+try:
+    import aubio
+    HAS_AUBIO = True
+except ImportError:
+    HAS_AUBIO = False
+    print("WARNING: aubio not installed — guitar splitting will be skipped")
+    print("  Install with: pip install aubio")
+
+SAMPLES_DIR = Path.home() / "Downloads" / "non-orchestral-samples"
+INSTRUMENTS_DIR = Path(__file__).parent.parent / "src" / "assets" / "instruments"
+
+NOTE_NAMES = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B']
+FLAT_TO_SHARP = {'Db': 'C#', 'Eb': 'D#', 'Gb': 'F#', 'Ab': 'G#', 'Bb': 'A#'}
+NOTE_MAP = {
+    'c': 0, 'c#': 1, 'db': 1, 'd': 2, 'd#': 3, 'eb': 3,
+    'e': 4, 'f': 5, 'f#': 6, 'gb': 6, 'g': 7, 'g#': 8, 'ab': 8,
+    'a': 9, 'a#': 10, 'bb': 10, 'b': 11,
+}
+
+
+def note_to_midi(note_name: str, octave: int) -> int:
+    return (octave + 1) * 12 + NOTE_MAP[note_name.lower()]
+
+
+def midi_to_name(midi: int) -> str:
+    return f"{NOTE_NAMES[midi % 12]}{midi // 12 - 1}"
+
+
+def parse_note_str(n: str) -> int:
+    """Parse 'E2', 'Bb5', 'C#3' etc to MIDI number."""
+    if len(n) >= 3 and n[1] in 'b#':
+        name, oct = n[:2], int(n[2:])
+        name = FLAT_TO_SHARP.get(name, name)
+    else:
+        name, oct = n[0], int(n[1:])
+    return (oct + 1) * 12 + NOTE_NAMES.index(name)
+
+
+def convert_to_mp3(input_path: Path, mp3_path: Path, bitrate: str = '192k'):
+    """Convert any audio to normalized MP3."""
+    mp3_path.parent.mkdir(parents=True, exist_ok=True)
+    if mp3_path.exists():
+        return
+    subprocess.run([
+        'ffmpeg', '-i', str(input_path),
+        '-af', 'loudnorm=I=-16:TP=-1:LRA=11',
+        '-ar', '44100', '-ab', bitrate,
+        '-y', '-loglevel', 'error',
+        str(mp3_path)
+    ], check=True)
+
+
+def extract_segment(input_path: Path, output_path: Path, start: float, end: float,
+                    bitrate: str = '192k'):
+    """Extract a time segment from audio and convert to normalized MP3."""
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    if output_path.exists():
+        return
+    duration = end - start
+    subprocess.run([
+        'ffmpeg', '-ss', str(start), '-i', str(input_path),
+        '-t', str(duration),
+        '-af', 'loudnorm=I=-16:TP=-1:LRA=11',
+        '-ar', '44100', '-ab', bitrate,
+        '-y', '-loglevel', 'error',
+        str(output_path)
+    ], check=True)
+
+
+def compute_key_ranges(layers: list[dict]) -> list[dict]:
+    if not layers:
+        return layers
+    layers.sort(key=lambda l: l['root_key'])
+    for i, layer in enumerate(layers):
+        if i == 0:
+            layer['key_min'] = 0
+        else:
+            midpoint = (layers[i-1]['root_key'] + layer['root_key']) // 2 + 1
+            layer['key_min'] = midpoint
+            layers[i-1]['key_max'] = midpoint - 1
+        if i == len(layers) - 1:
+            layer['key_max'] = 127
+    return layers
+
+
+def make_preset(name: str, description: str, author: str, tags: list[str],
+                layers: list[dict], attack: float = 0.01, release: float = 0.3) -> dict:
+    return {
+        "metadata": {
+            "name": name,
+            "description": description,
+            "author": author,
+            "version": 1,
+            "tags": tags
+        },
+        "midi_targets": [0],
+        "output_node": 2,
+        "nodes": [
+            {
+                "id": 0, "node_type": "MidiInput", "name": "MIDI In",
+                "parameters": {}, "position": [100.0, 100.0]
+            },
+            {
+                "id": 1, "node_type": "MultiSampler", "name": f"{name} Sampler",
+                "parameters": {"0": 1.0, "1": attack, "2": release, "3": 0.0},
+                "sample_data": {"type": "multi_sampler", "layers": layers},
+                "position": [350.0, 0.0]
+            },
+            {
+                "id": 2, "node_type": "AudioOutput", "name": "Out",
+                "parameters": {}, "position": [700.0, 100.0]
+            }
+        ],
+        "connections": [
+            {"from_node": 0, "from_port": 0, "to_node": 1, "to_port": 0},
+            {"from_node": 1, "from_port": 0, "to_node": 2, "to_port": 0}
+        ]
+    }
+
+
+# ============================================================
+# ACOUSTIC GUITAR (University of Iowa MIS)
+# ============================================================
+
+def detect_onsets(fpath: str, threshold: float = 0.3, minioi: float = 2.0,
+                  method: str = "default") -> list[float]:
+    """Detect note onsets in an audio file using aubio."""
+    src = aubio.source(fpath, 44100, 512)
+    onset_det = aubio.onset(method, 1024, 512, 44100)
+    onset_det.set_threshold(threshold)
+    onset_det.set_minioi_s(minioi)
+    onsets = []
+    while True:
+        samples, read = src()
+        if onset_det(samples):
+            onsets.append(onset_det.get_last_s())
+        if read < 512:
+            break
+    if not onsets or onsets[0] > 1.0:
+        onsets.insert(0, 0.0)
+    return onsets
+
+
+def get_file_duration(fpath: str) -> float:
+    """Get audio file duration in seconds."""
+    result = subprocess.run(
+        ['ffprobe', '-v', 'error', '-show_entries', 'format=duration',
+         '-of', 'default=noprint_wrappers=1:nokey=1', fpath],
+        capture_output=True, text=True)
+    return float(result.stdout.strip())
+
+
+# Preferred string for each MIDI note range (avoids duplicates across strings)
+GUITAR_STRING_RANGES = {
+    'sulE':  (40, 49),  # E2-C#3
+    'sulA':  (50, 54),  # D3-F#3
+    'sulD':  (55, 58),  # G3-A#3
+    'sulG':  (59, 63),  # B3-D#4
+    'sulB':  (64, 68),  # E4-G#4
+    'sul_E': (69, 83),  # A4-B5
+}
+
+
+def build_guitar():
+    """Split Iowa MIS guitar chromatic scales into individual notes and build preset."""
+    if not HAS_AUBIO:
+        print("  SKIPPED (aubio required)")
+        return
+
+    guitar_dir = SAMPLES_DIR / "iowa-guitar" / "extracted" / "1644stereo"
+    if not guitar_dir.exists():
+        print(f"  ERROR: Guitar samples not found at {guitar_dir}")
+        return
+
+    out_dir = INSTRUMENTS_DIR / "guitar" / "acoustic-guitar"
+    samples_dir = out_dir / "samples"
+    samples_dir.mkdir(parents=True, exist_ok=True)
+
+    # Process each dynamic level
+    DYNAMICS = {'pp': (0, 42), 'mf': (43, 95), 'ff': (96, 127)}
+    all_layers = []
+
+    for dyn, (vel_min, vel_max) in DYNAMICS.items():
+        print(f"  Processing {dyn} dynamics...")
+        # Use lower threshold for pp to catch quiet onsets
+        threshold = 0.2 if dyn == 'pp' else 0.3
+
+        for fname in sorted(os.listdir(guitar_dir)):
+            if not fname.endswith('.aif'):
+                continue
+            parts = fname.replace('.aif', '').split('.')
+            if parts[1] != dyn:
+                continue
+
+            string = parts[2]
+            note_range_str = parts[3]
+
+            # Parse note range
+            m = re.match(r'([A-G][b#]?\d)([A-G][b#]?\d)', note_range_str)
+            if m:
+                file_lo = parse_note_str(m.group(1))
+                file_hi = parse_note_str(m.group(2))
+            else:
+                file_lo = file_hi = parse_note_str(note_range_str)
+
+            # Check overlap with preferred range for this string
+            pref_lo, pref_hi = GUITAR_STRING_RANGES.get(string, (0, 0))
+            overlap_lo = max(file_lo, pref_lo)
+            overlap_hi = min(file_hi, pref_hi)
+            if overlap_lo > overlap_hi:
+                continue  # No notes needed from this file
+
+            fpath = str(guitar_dir / fname)
+            total_notes = file_hi - file_lo + 1
+
+            if total_notes == 1:
+                # Single note file
+                mp3_name = f"{midi_to_name(file_lo)}_{dyn}.mp3"
+                print(f"    {fname} -> {mp3_name}")
+                convert_to_mp3(Path(fpath), samples_dir / mp3_name)
+                all_layers.append({
+                    "file_path": f"samples/{mp3_name}",
+                    "root_key": file_lo,
+                    "velocity_min": vel_min,
+                    "velocity_max": vel_max,
+                })
+                continue
+
+            # Multi-note file: detect onsets and split
+            onsets = detect_onsets(fpath, threshold=threshold)
+            duration = get_file_duration(fpath)
+
+            if len(onsets) != total_notes:
+                # Try progressively different thresholds and methods
+                found = False
+                for method in ["default", "specflux"]:
+                    for t in [0.1, 0.15, 0.2, 0.5, 0.8, 1.0]:
+                        onsets = detect_onsets(fpath, threshold=t, method=method)
+                        if len(onsets) == total_notes:
+                            found = True
+                            break
+                    if found:
+                        break
+                if not found:
+                    print(f"    SKIPPING {fname} (no threshold/method gives {total_notes} onsets)")
+                    continue
+
+            # Extract each needed note
+            for note_idx in range(total_notes):
+                midi = file_lo + note_idx
+                if midi < overlap_lo or midi > overlap_hi:
+                    continue  # Not in our preferred range
+
+                start = onsets[note_idx]
+                end = onsets[note_idx + 1] if note_idx + 1 < len(onsets) else duration
+                # Trim to max 8 seconds per note (plenty for guitar decay)
+                end = min(end, start + 8.0)
+
+                mp3_name = f"{midi_to_name(midi)}_{dyn}.mp3"
+                print(f"    {fname} [{note_idx}] -> {mp3_name} ({start:.2f}s-{end:.2f}s)")
+                extract_segment(Path(fpath), samples_dir / mp3_name, start, end)
+
+                all_layers.append({
+                    "file_path": f"samples/{mp3_name}",
+                    "root_key": midi,
+                    "velocity_min": vel_min,
+                    "velocity_max": vel_max,
+                })
+
+    # Compute key ranges per velocity group
+    vel_groups = {}
+    for layer in all_layers:
+        vel_key = (layer["velocity_min"], layer["velocity_max"])
+        vel_groups.setdefault(vel_key, []).append(layer)
+
+    final_layers = []
+    for vel_key, group in vel_groups.items():
+        group = compute_key_ranges(group)
+        for layer in group:
+            layer["velocity_min"] = vel_key[0]
+            layer["velocity_max"] = vel_key[1]
+        final_layers.extend(group)
+
+    preset = make_preset(
+        "Acoustic Guitar",
+        "Nylon-string classical guitar (Raimundo 118) with three velocity layers",
+        "University of Iowa MIS",
+        ["guitar", "acoustic", "nylon", "classical"],
+        final_layers,
+        attack=0.001, release=0.8,
+    )
+    preset_path = out_dir / "acoustic-guitar.json"
+    with open(preset_path, 'w') as f:
+        json.dump(preset, f, indent=2)
+    print(f"  -> Wrote {preset_path} ({len(final_layers)} layers)")
+
+
+# ============================================================
+# BASS GUITAR (Karoryfer Growlybass)
+# ============================================================
+
+def parse_growlybass_filename(filename: str) -> dict | None:
+    """Parse Growlybass naming: note_dyn_rr.wav (e.g. a2_ff_rr1.wav, db2_pp_rr3.wav)"""
+    m = re.match(r'([a-g][b#]?)(\d+)_(pp|p|f|ff)_rr(\d+)\.wav', filename.lower())
+    if not m:
+        return None
+    note, octave = m.group(1), int(m.group(2))
+    dynamic = m.group(3)
+    rr = int(m.group(4))
+    midi = note_to_midi(note, octave)
+    return {'midi': midi, 'note': f"{note.upper()}{octave}", 'dynamic': dynamic, 'rr': rr}
+
+
+def build_bass_guitar():
+    """Build bass guitar instrument from Karoryfer Growlybass samples."""
+    source_dir = SAMPLES_DIR / "growlybass" / "extracted" / "Growlybass" / "sustain"
+    if not source_dir.exists():
+        print(f"  ERROR: Growlybass samples not found at {source_dir}")
+        return
+
+    out_dir = INSTRUMENTS_DIR / "guitar" / "bass-guitar"
+    samples_dir = out_dir / "samples"
+    samples_dir.mkdir(parents=True, exist_ok=True)
+
+    # Growlybass has 4 dynamics (pp, p, f, ff) and 4 round robins each.
+    # We'll use round robin 1 only (our MultiSampler doesn't support round robin yet)
+    # and map all 4 dynamics to velocity layers.
+    DYNAMICS_ORDER = ['pp', 'p', 'f', 'ff']
+    dynamics_groups: dict[str, list[dict]] = {}
+
+    for wav in sorted(source_dir.glob("*.wav")):
+        parsed = parse_growlybass_filename(wav.name)
+        if not parsed:
+            print(f"  WARNING: Could not parse {wav.name}")
+            continue
+        if parsed['rr'] != 1:
+            continue  # Only use round robin 1
+
+        dyn = parsed['dynamic']
+        mp3_name = f"{parsed['note']}_{dyn}.mp3"
+        mp3_path = samples_dir / mp3_name
+        print(f"  Converting {wav.name} -> {mp3_name} (MIDI {parsed['midi']})")
+        convert_to_mp3(wav, mp3_path)
+
+        layer = {
+            "file_path": f"samples/{mp3_name}",
+            "root_key": parsed['midi'],
+        }
+        dynamics_groups.setdefault(dyn, []).append(layer)
+
+    # Assign velocity ranges
+    num_levels = len(dynamics_groups)
+    vel_step = 128 // num_levels
+    dyn_keys = sorted(dynamics_groups.keys(),
+                      key=lambda d: DYNAMICS_ORDER.index(d))
+    for i, dyn in enumerate(dyn_keys):
+        vel_min = i * vel_step
+        vel_max = (i + 1) * vel_step - 1 if i < num_levels - 1 else 127
+        for layer in dynamics_groups[dyn]:
+            layer["velocity_min"] = vel_min
+            layer["velocity_max"] = vel_max
+
+    # Compute key ranges per velocity group
+    all_layers = []
+    for dyn, group in dynamics_groups.items():
+        group = compute_key_ranges(group)
+        all_layers.extend(group)
+
+    preset = make_preset(
+        "Bass Guitar",
+        "Electric bass guitar (Squier Jazz) with four velocity layers",
+        "Karoryfer Samples (CC0)",
+        ["guitar", "bass", "electric"],
+        all_layers,
+        attack=0.001, release=0.5,
+    )
+    preset_path = out_dir / "bass-guitar.json"
+    with open(preset_path, 'w') as f:
+        json.dump(preset, f, indent=2)
+    dyn_summary = ", ".join(f"{k}: {len(v)}" for k, v in dynamics_groups.items())
+    print(f"  -> Wrote {preset_path} ({len(all_layers)} layers: {dyn_summary})")
+
+
+# ============================================================
+# DRUM KIT (Salamander Drumkit)
+# ============================================================
+
+# Salamander uses GM-like drum mapping.
+# Files: kick_OH_F_1.wav, snare_OH_FF_1.wav, hihatClosed_OH_P_1.wav, etc.
+# OH = overhead mic, F/FF/P/PP/MP/Ghost = dynamics, number = round robin
+
+# GM drum map — maps Salamander drum names to MIDI notes
+GM_DRUMS = {
+    'kick':           36,  # C2  - Bass Drum 1
+    'snare':          38,  # D2  - Acoustic Snare
+    'snareOFF':       40,  # E2  - Electric Snare (snares off)
+    'snareStick':     37,  # C#2 - Side Stick
+    'hihatClosed':    42,  # F#2 - Closed Hi-Hat
+    'hihatOpen':      46,  # A#2 - Open Hi-Hat
+    'hihatFoot':      44,  # G#2 - Pedal Hi-Hat
+    'hiTom':          50,  # D3  - High Tom
+    'loTom':          45,  # A2  - Low Tom
+    'crash1':         49,  # C#3 - Crash Cymbal 1
+    'crash2':         57,  # A3  - Crash Cymbal 2
+    'ride1':          51,  # D#3 - Ride Cymbal 1
+    'ride1Bell':      53,  # F3  - Ride Bell
+    'cowbell':        56,  # G#3 - Cowbell
+    'splash1':        55,  # G3  - Splash Cymbal
+}
+
+
+def parse_salamander_filename(filename: str) -> dict | None:
+    """Parse Salamander naming: drum_OH_dyn_rr.wav or drum_dyn_rr.wav"""
+    # Try with OH mic prefix first
+    m = re.match(r'(\w+?)_OH_([A-Za-z]+)_(\d+)\.wav', filename)
+    if not m:
+        # Some drums (cowbell, bellchime) don't have _OH_
+        m = re.match(r'(\w+?)_([A-Z][A-Za-z]*)_(\d+)\.wav', filename)
+    if not m:
+        return None
+    drum, dynamic, rr = m.group(1), m.group(2).lower(), int(m.group(3))
+    midi = GM_DRUMS.get(drum)
+    if midi is None:
+        return None
+    return {'midi': midi, 'drum': drum, 'dynamic': dynamic, 'rr': rr}
+
+
+def build_drum_kit():
+    """Build drum kit instrument from Salamander Drumkit samples."""
+    # Find the OH (overhead mic) sample directory
+    sal_base = SAMPLES_DIR / "salamander-drums"
+    source_dir = None
+    for candidate in [sal_base / "OH",
+                      sal_base / "salamanderDrumkit" / "OH"]:
+        if candidate.exists():
+            source_dir = candidate
+            break
+
+    if source_dir is None:
+        for p in sal_base.rglob("OH"):
+            if p.is_dir():
+                source_dir = p
+                break
+
+    if source_dir is None:
+        print(f"  ERROR: Salamander OH samples not found under {sal_base}")
+        return
+
+    print(f"  Using samples from: {source_dir}")
+    out_dir = INSTRUMENTS_DIR / "drums" / "drum-kit"
+    samples_dir = out_dir / "samples"
+    samples_dir.mkdir(parents=True, exist_ok=True)
+
+    # Group by drum type and dynamics
+    # We'll use OH (overhead) mic for a natural stereo image
+    # Only use round robin 1 to keep size down
+    drum_groups: dict[str, dict[str, list]] = {}  # drum -> {dyn: [layers]}
+
+    for wav in sorted(source_dir.glob("*.wav")):
+        parsed = parse_salamander_filename(wav.name)
+        if not parsed:
+            continue
+        if parsed['rr'] != 1:
+            continue
+
+        drum = parsed['drum']
+        dyn = parsed['dynamic']
+        mp3_name = f"{drum}_{dyn}.mp3"
+        mp3_path = samples_dir / mp3_name
+        print(f"  Converting {wav.name} -> {mp3_name} (MIDI {parsed['midi']})")
+        convert_to_mp3(wav, mp3_path)
+
+        drum_groups.setdefault(drum, {}).setdefault(dyn, []).append({
+            "file_path": f"samples/{mp3_name}",
+            "root_key": parsed['midi'],
+        })
+
+    # Build layers: each drum piece gets its own MIDI note
+    # Dynamics map to velocity layers
+    DYNAMICS_ORDER = ['ghost', 'pp', 'p', 'mp', 'mf', 'f', 'ff']
+    all_layers = []
+
+    for drum, dyn_map in drum_groups.items():
+        dyn_keys = sorted(dyn_map.keys(),
+                          key=lambda d: DYNAMICS_ORDER.index(d) if d in DYNAMICS_ORDER else 3)
+        num_levels = len(dyn_keys)
+
+        if num_levels == 1:
+            for layer in list(dyn_map.values())[0]:
+                layer["velocity_min"] = 0
+                layer["velocity_max"] = 127
+                layer["key_min"] = layer["root_key"]
+                layer["key_max"] = layer["root_key"]
+                all_layers.append(layer)
+        else:
+            vel_step = 128 // num_levels
+            for i, dyn in enumerate(dyn_keys):
+                vel_min = i * vel_step
+                vel_max = (i + 1) * vel_step - 1 if i < num_levels - 1 else 127
+                for layer in dyn_map[dyn]:
+                    layer["velocity_min"] = vel_min
+                    layer["velocity_max"] = vel_max
+                    layer["key_min"] = layer["root_key"]
+                    layer["key_max"] = layer["root_key"]
+                    all_layers.append(layer)
+
+    preset = make_preset(
+        "Drum Kit",
+        "Acoustic drum kit (Salamander) — GM-compatible MIDI mapping",
+        "Salamander Drumkit (Public Domain)",
+        ["drums", "percussion", "kit", "acoustic"],
+        all_layers,
+        attack=0.001, release=0.5,
+    )
+    preset_path = out_dir / "drum-kit.json"
+    with open(preset_path, 'w') as f:
+        json.dump(preset, f, indent=2)
+    print(f"  -> Wrote {preset_path} ({len(all_layers)} layers, {len(drum_groups)} drums)")
+
+
+# ============================================================
+# MAIN
+# ============================================================
+
+def main():
+    print("=== Building Non-Orchestral Factory Instruments ===\n")
+
+    print("\n[1/3] Acoustic Guitar (University of Iowa MIS)")
+    build_guitar()
+
+    print("\n[2/3] Bass Guitar (Karoryfer Growlybass)")
+    build_bass_guitar()
+
+    print("\n[3/3] Drum Kit (Salamander Drumkit)")
+    build_drum_kit()
+
+    print("\n=== Done! ===")
+
+
+if __name__ == '__main__':
+    main()
diff --git a/src/assets/instruments/drums/drum-kit/drum-kit.json b/src/assets/instruments/drums/drum-kit/drum-kit.json
new file mode 100644
index 0000000..0d31995
--- /dev/null
+++ b/src/assets/instruments/drums/drum-kit/drum-kit.json
@@ -0,0 +1,346 @@
+{
+  "metadata": {
+    "name": "Drum Kit",
+    "description": "Acoustic drum kit (Salamander) \u2014 GM-compatible MIDI mapping",
+    "author": "Salamander Drumkit (Public Domain)",
+    "version": 1,
+    "tags": [
+      "drums",
+      "percussion",
+      "kit",
+      "acoustic"
+    ]
+  },
+  "midi_targets": [
+    0
+  ],
+  "output_node": 2,
+  "nodes": [
+    {
+      "id": 0,
+      "node_type": "MidiInput",
+      "name": "MIDI In",
+      "parameters": {},
+      "position": [
+        100.0,
+        100.0
+      ]
+    },
+    {
+      "id": 1,
+      "node_type": "MultiSampler",
+      "name": "Drum Kit Sampler",
+      "parameters": {
+        "0": 1.0,
+        "1": 0.001,
+        "2": 0.5,
+        "3": 0.0
+      },
+      "sample_data": {
+        "type": "multi_sampler",
+        "layers": [
+          {
+            "file_path": "samples/cowbell_p.mp3",
+            "root_key": 56,
+            "velocity_min": 0,
+            "velocity_max": 41,
+            "key_min": 56,
+            "key_max": 56
+          },
+          {
+            "file_path": "samples/cowbell_mp.mp3",
+            "root_key": 56,
+            "velocity_min": 42,
+            "velocity_max": 83,
+            "key_min": 56,
+            "key_max": 56
+          },
+          {
+            "file_path": "samples/cowbell_ff.mp3",
+            "root_key": 56,
+            "velocity_min": 84,
+            "velocity_max": 127,
+            "key_min": 56,
+            "key_max": 56
+          },
+          {
+            "file_path": "samples/crash1_p.mp3",
+            "root_key": 49,
+            "velocity_min": 0,
+            "velocity_max": 63,
+            "key_min": 49,
+            "key_max": 49
+          },
+          {
+            "file_path": "samples/crash1_ff.mp3",
+            "root_key": 49,
+            "velocity_min": 64,
+            "velocity_max": 127,
+            "key_min": 49,
+            "key_max": 49
+          },
+          {
+            "file_path": "samples/crash2_p.mp3",
+            "root_key": 57,
+            "velocity_min": 0,
+            "velocity_max": 63,
+            "key_min": 57,
+            "key_max": 57
+          },
+          {
+            "file_path": "samples/crash2_ff.mp3",
+            "root_key": 57,
+            "velocity_min": 64,
+            "velocity_max": 127,
+            "key_min": 57,
+            "key_max": 57
+          },
+          {
+            "file_path": "samples/hiTom_p.mp3",
+            "root_key": 50,
+            "velocity_min": 0,
+            "velocity_max": 41,
+            "key_min": 50,
+            "key_max": 50
+          },
+          {
+            "file_path": "samples/hiTom_f.mp3",
+            "root_key": 50,
+            "velocity_min": 42,
+            "velocity_max": 83,
+            "key_min": 50,
+            "key_max": 50
+          },
+          {
+            "file_path": "samples/hiTom_ff.mp3",
+            "root_key": 50,
+            "velocity_min": 84,
+            "velocity_max": 127,
+            "key_min": 50,
+            "key_max": 50
+          },
+          {
+            "file_path": "samples/hihatClosed_p.mp3",
+            "root_key": 42,
+            "velocity_min": 0,
+            "velocity_max": 63,
+            "key_min": 42,
+            "key_max": 42
+          },
+          {
+            "file_path": "samples/hihatClosed_f.mp3",
+            "root_key": 42,
+            "velocity_min": 64,
+            "velocity_max": 127,
+            "key_min": 42,
+            "key_max": 42
+          },
+          {
+            "file_path": "samples/hihatFoot_mp.mp3",
+            "root_key": 44,
+            "velocity_min": 0,
+            "velocity_max": 127,
+            "key_min": 44,
+            "key_max": 44
+          },
+          {
+            "file_path": "samples/hihatOpen_p.mp3",
+            "root_key": 46,
+            "velocity_min": 0,
+            "velocity_max": 41,
+            "key_min": 46,
+            "key_max": 46
+          },
+          {
+            "file_path": "samples/hihatOpen_f.mp3",
+            "root_key": 46,
+            "velocity_min": 42,
+            "velocity_max": 83,
+            "key_min": 46,
+            "key_max": 46
+          },
+          {
+            "file_path": "samples/hihatOpen_ff.mp3",
+            "root_key": 46,
+            "velocity_min": 84,
+            "velocity_max": 127,
+            "key_min": 46,
+            "key_max": 46
+          },
+          {
+            "file_path": "samples/kick_p.mp3",
+            "root_key": 36,
+            "velocity_min": 0,
+            "velocity_max": 41,
+            "key_min": 36,
+            "key_max": 36
+          },
+          {
+            "file_path": "samples/kick_f.mp3",
+            "root_key": 36,
+            "velocity_min": 42,
+            "velocity_max": 83,
+            "key_min": 36,
+            "key_max": 36
+          },
+          {
+            "file_path": "samples/kick_ff.mp3",
+            "root_key": 36,
+            "velocity_min": 84,
+            "velocity_max": 127,
+            "key_min": 36,
+            "key_max": 36
+          },
+          {
+            "file_path": "samples/loTom_pp.mp3",
+            "root_key": 45,
+            "velocity_min": 0,
+            "velocity_max": 41,
+            "key_min": 45,
+            "key_max": 45
+          },
+          {
+            "file_path": "samples/loTom_mp.mp3",
+            "root_key": 45,
+            "velocity_min": 42,
+            "velocity_max": 83,
+            "key_min": 45,
+            "key_max": 45
+          },
+          {
+            "file_path": "samples/loTom_ff.mp3",
+            "root_key": 45,
+            "velocity_min": 84,
+            "velocity_max": 127,
+            "key_min": 45,
+            "key_max": 45
+          },
+          {
+            "file_path": "samples/ride1Bell_f.mp3",
+            "root_key": 53,
+            "velocity_min": 0,
+            "velocity_max": 127,
+            "key_min": 53,
+            "key_max": 53
+          },
+          {
+            "file_path": "samples/ride1_mp.mp3",
+            "root_key": 51,
+            "velocity_min": 0,
+            "velocity_max": 63,
+            "key_min": 51,
+            "key_max": 51
+          },
+          {
+            "file_path": "samples/ride1_ff.mp3",
+            "root_key": 51,
+            "velocity_min": 64,
+            "velocity_max": 127,
+            "key_min": 51,
+            "key_max": 51
+          },
+          {
+            "file_path": "samples/snareOFF_p.mp3",
+            "root_key": 40,
+            "velocity_min": 0,
+            "velocity_max": 63,
+            "key_min": 40,
+            "key_max": 40
+          },
+          {
+            "file_path": "samples/snareOFF_f.mp3",
+            "root_key": 40,
+            "velocity_min": 64,
+            "velocity_max": 127,
+            "key_min": 40,
+            "key_max": 40
+          },
+          {
+            "file_path": "samples/snareStick_f.mp3",
+            "root_key": 37,
+            "velocity_min": 0,
+            "velocity_max": 127,
+            "key_min": 37,
+            "key_max": 37
+          },
+          {
+            "file_path": "samples/snare_ghost.mp3",
+            "root_key": 38,
+            "velocity_min": 0,
+            "velocity_max": 31,
+            "key_min": 38,
+            "key_max": 38
+          },
+          {
+            "file_path": "samples/snare_mp.mp3",
+            "root_key": 38,
+            "velocity_min": 32,
+            "velocity_max": 63,
+            "key_min": 38,
+            "key_max": 38
+          },
+          {
+            "file_path": "samples/snare_f.mp3",
+            "root_key": 38,
+            "velocity_min": 64,
+            "velocity_max": 95,
+            "key_min": 38,
+            "key_max": 38
+          },
+          {
+            "file_path": "samples/snare_ff.mp3",
+            "root_key": 38,
+            "velocity_min": 96,
+            "velocity_max": 127,
+            "key_min": 38,
+            "key_max": 38
+          },
+          {
+            "file_path": "samples/splash1_p.mp3",
+            "root_key": 55,
+            "velocity_min": 0,
+            "velocity_max": 63,
+            "key_min": 55,
+            "key_max": 55
+          },
+          {
+            "file_path": "samples/splash1_f.mp3",
+            "root_key": 55,
+            "velocity_min": 64,
+            "velocity_max": 127,
+            "key_min": 55,
+            "key_max": 55
+          }
+        ]
+      },
+      "position": [
+        350.0,
+        0.0
+      ]
+    },
+    {
+      "id": 2,
+      "node_type": "AudioOutput",
+      "name": "Out",
+      "parameters": {},
+      "position": [
+        700.0,
+        100.0
+      ]
+    }
+  ],
+  "connections": [
+    {
+      "from_node": 0,
+      "from_port": 0,
+      "to_node": 1,
+      "to_port": 0
+    },
+    {
+      "from_node": 1,
+      "from_port": 0,
+      "to_node": 2,
+      "to_port": 0
+    }
+  ]
+}
\ No newline at end of file
diff --git a/src/assets/instruments/drums/drum-kit/samples/cowbell_ff.mp3 b/src/assets/instruments/drums/drum-kit/samples/cowbell_ff.mp3
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diff --git a/src/assets/instruments/drums/drum-kit/samples/crash2_ff.mp3 b/src/assets/instruments/drums/drum-kit/samples/crash2_ff.mp3
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diff --git a/src/assets/instruments/drums/drum-kit/samples/hihatClosed_f.mp3 b/src/assets/instruments/drums/drum-kit/samples/hihatClosed_f.mp3
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diff --git a/src/assets/instruments/drums/drum-kit/samples/hihatClosed_p.mp3 b/src/assets/instruments/drums/drum-kit/samples/hihatClosed_p.mp3
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diff --git a/src/assets/instruments/drums/drum-kit/samples/hihatFoot_mp.mp3 b/src/assets/instruments/drums/drum-kit/samples/hihatFoot_mp.mp3
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index 0000000..dc419d7
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diff --git a/src/assets/instruments/drums/drum-kit/samples/snareOFF_f.mp3 b/src/assets/instruments/drums/drum-kit/samples/snareOFF_f.mp3
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index 0000000..cc669fe
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diff --git a/src/assets/instruments/drums/drum-kit/samples/snareOFF_p.mp3 b/src/assets/instruments/drums/drum-kit/samples/snareOFF_p.mp3
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index 0000000..8dc5360
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diff --git a/src/assets/instruments/drums/drum-kit/samples/snareStick_f.mp3 b/src/assets/instruments/drums/drum-kit/samples/snareStick_f.mp3
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index 0000000..4724a77
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diff --git a/src/assets/instruments/drums/drum-kit/samples/snare_f.mp3 b/src/assets/instruments/drums/drum-kit/samples/snare_f.mp3
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index 0000000..a77927f
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diff --git a/src/assets/instruments/drums/drum-kit/samples/snare_ff.mp3 b/src/assets/instruments/drums/drum-kit/samples/snare_ff.mp3
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index 0000000..c3f0711
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diff --git a/src/assets/instruments/drums/drum-kit/samples/snare_ghost.mp3 b/src/assets/instruments/drums/drum-kit/samples/snare_ghost.mp3
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index 0000000..0c7be22
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diff --git a/src/assets/instruments/drums/drum-kit/samples/snare_mp.mp3 b/src/assets/instruments/drums/drum-kit/samples/snare_mp.mp3
new file mode 100644
index 0000000..7a17135
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diff --git a/src/assets/instruments/drums/drum-kit/samples/splash1_f.mp3 b/src/assets/instruments/drums/drum-kit/samples/splash1_f.mp3
new file mode 100644
index 0000000..b0d3807
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diff --git a/src/assets/instruments/drums/drum-kit/samples/splash1_p.mp3 b/src/assets/instruments/drums/drum-kit/samples/splash1_p.mp3
new file mode 100644
index 0000000..7078cb6
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diff --git a/src/assets/instruments/guitar/acoustic-guitar/acoustic-guitar.json b/src/assets/instruments/guitar/acoustic-guitar/acoustic-guitar.json
new file mode 100644
index 0000000..c598d7e
--- /dev/null
+++ b/src/assets/instruments/guitar/acoustic-guitar/acoustic-guitar.json
@@ -0,0 +1,1122 @@
+{
+  "metadata": {
+    "name": "Acoustic Guitar",
+    "description": "Nylon-string classical guitar (Raimundo 118) with three velocity layers",
+    "author": "University of Iowa MIS",
+    "version": 1,
+    "tags": [
+      "guitar",
+      "acoustic",
+      "nylon",
+      "classical"
+    ]
+  },
+  "midi_targets": [
+    0
+  ],
+  "output_node": 2,
+  "nodes": [
+    {
+      "id": 0,
+      "node_type": "MidiInput",
+      "name": "MIDI In",
+      "parameters": {},
+      "position": [
+        100.0,
+        100.0
+      ]
+    },
+    {
+      "id": 1,
+      "node_type": "MultiSampler",
+      "name": "Acoustic Guitar Sampler",
+      "parameters": {
+        "0": 1.0,
+        "1": 0.001,
+        "2": 0.8,
+        "3": 0.0
+      },
+      "sample_data": {
+        "type": "multi_sampler",
+        "layers": [
+          {
+            "file_path": "samples/E2_pp.mp3",
+            "root_key": 40,
+            "velocity_min": 0,
+            "velocity_max": 42,
+            "key_min": 0,
+            "key_max": 40
+          },
+          {
+            "file_path": "samples/F2_pp.mp3",
+            "root_key": 41,
+            "velocity_min": 0,
+            "velocity_max": 42,
+            "key_min": 41,
+            "key_max": 41
+          },
+          {
+            "file_path": "samples/F#2_pp.mp3",
+            "root_key": 42,
+            "velocity_min": 0,
+            "velocity_max": 42,
+            "key_min": 42,
+            "key_max": 42
+          },
+          {
+            "file_path": "samples/G2_pp.mp3",
+            "root_key": 43,
+            "velocity_min": 0,
+            "velocity_max": 42,
+            "key_min": 43,
+            "key_max": 43
+          },
+          {
+            "file_path": "samples/G#2_pp.mp3",
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Binary files /dev/null and b/src/assets/instruments/guitar/acoustic-guitar/samples/G5_pp.mp3 differ
diff --git a/src/assets/instruments/guitar/bass-guitar/bass-guitar.json b/src/assets/instruments/guitar/bass-guitar/bass-guitar.json
new file mode 100644
index 0000000..e0be3a0
--- /dev/null
+++ b/src/assets/instruments/guitar/bass-guitar/bass-guitar.json
@@ -0,0 +1,521 @@
+{
+  "metadata": {
+    "name": "Bass Guitar",
+    "description": "Electric bass guitar (Squier Jazz) with four velocity layers",
+    "author": "Karoryfer Samples (CC0)",
+    "version": 1,
+    "tags": [
+      "guitar",
+      "bass",
+      "electric"
+    ]
+  },
+  "midi_targets": [
+    0
+  ],
+  "output_node": 2,
+  "nodes": [
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+      "node_type": "MidiInput",
+      "name": "MIDI In",
+      "parameters": {},
+      "position": [
+        100.0,
+        100.0
+      ]
+    },
+    {
+      "id": 1,
+      "node_type": "MultiSampler",
+      "name": "Bass Guitar Sampler",
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+        "0": 1.0,
+        "1": 0.001,
+        "2": 0.5,
+        "3": 0.0
+      },
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+    }
+  ]
+}
\ No newline at end of file
diff --git a/src/assets/instruments/guitar/bass-guitar/samples/A2_f.mp3 b/src/assets/instruments/guitar/bass-guitar/samples/A2_f.mp3
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Binary files /dev/null and b/src/assets/instruments/guitar/bass-guitar/samples/A2_f.mp3 differ
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new file mode 100644
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Binary files /dev/null and b/src/assets/instruments/guitar/bass-guitar/samples/A2_ff.mp3 differ
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Binary files /dev/null and b/src/assets/instruments/guitar/bass-guitar/samples/A2_p.mp3 differ
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Binary files /dev/null and b/src/assets/instruments/guitar/bass-guitar/samples/A2_pp.mp3 differ
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Binary files /dev/null and b/src/assets/instruments/guitar/bass-guitar/samples/A3_ff.mp3 differ
diff --git a/src/assets/instruments/guitar/bass-guitar/samples/A3_p.mp3 b/src/assets/instruments/guitar/bass-guitar/samples/A3_p.mp3
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Binary files /dev/null and b/src/assets/instruments/guitar/bass-guitar/samples/A4_f.mp3 differ
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Binary files /dev/null and b/src/assets/instruments/guitar/bass-guitar/samples/A4_ff.mp3 differ
diff --git a/src/assets/instruments/guitar/bass-guitar/samples/A4_p.mp3 b/src/assets/instruments/guitar/bass-guitar/samples/A4_p.mp3
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