diff --git a/src/assets/instruments/README.md b/src/assets/instruments/README.md
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+# Lightningbeam Factory Instruments
+
+This directory contains bundled factory instruments for Lightningbeam DAW.
+
+## Directory Structure
+
+Instruments are organized by category:
+
+```
+instruments/
+  keyboards/          # Sampled keyboard instruments
+    piano/
+      samples/        # MP3 audio samples
+        A1.mp3
+        C1.mp3
+        ...
+      piano.json      # MultiSampler configuration
+    epiano/
+      ...
+  synthesizers/       # Synthesizer presets (node graph-based)
+    bass.json
+    lead.json
+    pad.json
+    ...
+  drums/              # Drum kits and percussion
+    acoustic_kit/
+      ...
+```
+
+## Instrument Definition Format
+
+Each instrument is a JSON file that defines a MultiSampler node configuration:
+
+```json
+{
+  "name": "Instrument Name",
+  "description": "Brief description",
+  "version": "1.0",
+  "node_type": "MultiSampler",
+  "parameters": {
+    "gain": 1.0,
+    "attack": 0.001,
+    "release": 0.5,
+    "transpose": 0
+  },
+  "layers": [
+    {
+      "sample_path": "./samples/C4.mp3",
+      "root_note": 60,           // MIDI note number (C4 = 60)
+      "key_range": [58, 62],     // MIDI notes [min, max]
+      "velocity_range": [0, 127] // Velocity [min, max]
+    }
+  ]
+}
+```
+
+## MIDI Note Numbers
+
+- C1 = 24, A1 = 33
+- C2 = 36, A2 = 45
+- C3 = 48, A3 = 57
+- C4 = 60 (middle C), A4 = 69
+- C5 = 72, A5 = 81
+- C6 = 84, A6 = 93
+- C7 = 96, A7 = 105
+
+## Sample Format Guidelines
+
+**Factory Samples (bundled):**
+- Format: MP3 (for size efficiency)
+- Sample rate: 44.1 kHz recommended
+- Bit depth: 16-bit minimum
+- Total size: Keep under 50MB per instrument
+
+**User Samples (external):**
+- Format: WAV, FLAC, MP3, OGG
+- Any sample rate/bit depth supported
+- No size restrictions
+
+## Adding New Instruments
+
+1. Create a new directory: `instruments/my-instrument/`
+2. Add samples to: `instruments/my-instrument/samples/`
+3. Create configuration: `instruments/my-instrument/my-instrument.json`
+4. Reference samples with relative paths: `./samples/filename.mp3`
+
+## Loading Instruments
+
+Instruments are loaded via the frontend and can be:
+- Dragged into the node graph editor
+- Selected from the instrument browser
+- Loaded programmatically via the MultiSampler API
diff --git a/src/assets/instruments/keyboards/piano/piano.json b/src/assets/instruments/keyboards/piano/piano.json
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+{
+  "metadata": {
+    "name": "Grand Piano",
+    "description": "Acoustic grand piano with multi-octave sampling",
+    "author": "Lightningbeam",
+    "version": 1,
+    "tags": ["piano", "keyboard", "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": "Piano Sampler",
+      "parameters": {
+        "0": 1.0,
+        "1": 0.001,
+        "2": 0.5,
+        "3": 0.0
+      },
+      "sample_data": {
+        "type": "multi_sampler",
+        "layers": [
+          { "file_path": "samples/C1.mp3", "key_min": 0, "key_max": 28, "root_key": 24, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/A1.mp3", "key_min": 29, "key_max": 34, "root_key": 33, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/C2.mp3", "key_min": 35, "key_max": 40, "root_key": 36, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/A2.mp3", "key_min": 41, "key_max": 46, "root_key": 45, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/C3.mp3", "key_min": 47, "key_max": 52, "root_key": 48, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/A3.mp3", "key_min": 53, "key_max": 58, "root_key": 57, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/C4.mp3", "key_min": 59, "key_max": 64, "root_key": 60, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/A4.mp3", "key_min": 65, "key_max": 70, "root_key": 69, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/C5.mp3", "key_min": 71, "key_max": 76, "root_key": 72, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/A5.mp3", "key_min": 77, "key_max": 82, "root_key": 81, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/C6.mp3", "key_min": 83, "key_max": 88, "root_key": 84, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/A6.mp3", "key_min": 89, "key_max": 94, "root_key": 93, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/C7.mp3", "key_min": 95, "key_max": 100, "root_key": 96, "velocity_min": 0, "velocity_max": 127 },
+          { "file_path": "samples/A7.mp3", "key_min": 101, "key_max": 127, "root_key": 105, "velocity_min": 0, "velocity_max": 127 }
+        ]
+      },
+      "position": [350.0, 100.0]
+    },
+    {
+      "id": 2,
+      "node_type": "AudioOutput",
+      "name": "Out",
+      "parameters": {},
+      "position": [600.0, 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 }
+  ]
+}
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diff --git a/src/assets/instruments/keyboards/piano/samples/C7.mp3 b/src/assets/instruments/keyboards/piano/samples/C7.mp3
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diff --git a/src/assets/instruments/synthesizers/bass.json b/src/assets/instruments/synthesizers/bass.json
new file mode 100644
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+++ b/src/assets/instruments/synthesizers/bass.json
@@ -0,0 +1,86 @@
+{
+  "metadata": {
+    "name": "Deep Bass",
+    "description": "Thick sub bass with sawtooth oscillator",
+    "author": "Lightningbeam",
+    "version": 1,
+    "tags": ["bass", "sub", "synth"]
+  },
+  "midi_targets": [0],
+  "output_node": 6,
+  "nodes": [
+    {
+      "id": 0,
+      "node_type": "MidiInput",
+      "name": "MIDI In",
+      "parameters": {},
+      "position": [100.0, 100.0]
+    },
+    {
+      "id": 1,
+      "node_type": "MidiToCV",
+      "name": "MIDI→CV",
+      "parameters": {},
+      "position": [300.0, 100.0]
+    },
+    {
+      "id": 2,
+      "node_type": "Oscillator",
+      "name": "Osc",
+      "parameters": {
+        "0": 110.0,
+        "1": 0.7,
+        "2": 1.0
+      },
+      "position": [500.0, 80.0]
+    },
+    {
+      "id": 3,
+      "node_type": "ADSR",
+      "name": "Amp Env",
+      "parameters": {
+        "0": 0.005,
+        "1": 0.2,
+        "2": 0.8,
+        "3": 0.3
+      },
+      "position": [500.0, 200.0]
+    },
+    {
+      "id": 4,
+      "node_type": "Gain",
+      "name": "VCA",
+      "parameters": {
+        "0": 1.0
+      },
+      "position": [700.0, 100.0]
+    },
+    {
+      "id": 5,
+      "node_type": "Filter",
+      "name": "LP Filter",
+      "parameters": {
+        "0": 800.0,
+        "1": 1.5,
+        "2": 0.0
+      },
+      "position": [900.0, 100.0]
+    },
+    {
+      "id": 6,
+      "node_type": "AudioOutput",
+      "name": "Out",
+      "parameters": {},
+      "position": [1100.0, 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 },
+    { "from_node": 1, "from_port": 1, "to_node": 3, "to_port": 0 },
+    { "from_node": 2, "from_port": 0, "to_node": 4, "to_port": 0 },
+    { "from_node": 3, "from_port": 0, "to_node": 4, "to_port": 1 },
+    { "from_node": 4, "from_port": 0, "to_node": 5, "to_port": 0 },
+    { "from_node": 5, "from_port": 0, "to_node": 6, "to_port": 0 }
+  ]
+}
diff --git a/src/assets/instruments/synthesizers/lead.json b/src/assets/instruments/synthesizers/lead.json
new file mode 100644
index 0000000..edc2be1
--- /dev/null
+++ b/src/assets/instruments/synthesizers/lead.json
@@ -0,0 +1,99 @@
+{
+  "metadata": {
+    "name": "Bright Lead",
+    "description": "Piercing lead synth with filter modulation",
+    "author": "Lightningbeam",
+    "version": 1,
+    "tags": ["lead", "synth", "solo"]
+  },
+  "midi_targets": [0],
+  "output_node": 7,
+  "nodes": [
+    {
+      "id": 0,
+      "node_type": "MidiInput",
+      "name": "MIDI In",
+      "parameters": {},
+      "position": [100.0, 100.0]
+    },
+    {
+      "id": 1,
+      "node_type": "MidiToCV",
+      "name": "MIDI→CV",
+      "parameters": {},
+      "position": [300.0, 100.0]
+    },
+    {
+      "id": 2,
+      "node_type": "Oscillator",
+      "name": "Osc",
+      "parameters": {
+        "0": 440.0,
+        "1": 0.6,
+        "2": 2.0
+      },
+      "position": [500.0, 60.0]
+    },
+    {
+      "id": 3,
+      "node_type": "LFO",
+      "name": "Filter Mod",
+      "parameters": {
+        "0": 5.0,
+        "1": 0.5,
+        "2": 0.0,
+        "3": 0.0
+      },
+      "position": [500.0, 200.0]
+    },
+    {
+      "id": 4,
+      "node_type": "Filter",
+      "name": "LP Filter",
+      "parameters": {
+        "0": 2000.0,
+        "1": 2.0,
+        "2": 0.0
+      },
+      "position": [700.0, 100.0]
+    },
+    {
+      "id": 5,
+      "node_type": "ADSR",
+      "name": "Amp Env",
+      "parameters": {
+        "0": 0.01,
+        "1": 0.1,
+        "2": 0.6,
+        "3": 0.2
+      },
+      "position": [700.0, 240.0]
+    },
+    {
+      "id": 6,
+      "node_type": "Gain",
+      "name": "VCA",
+      "parameters": {
+        "0": 1.0
+      },
+      "position": [900.0, 150.0]
+    },
+    {
+      "id": 7,
+      "node_type": "AudioOutput",
+      "name": "Out",
+      "parameters": {},
+      "position": [1100.0, 150.0]
+    }
+  ],
+  "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 },
+    { "from_node": 1, "from_port": 1, "to_node": 5, "to_port": 0 },
+    { "from_node": 2, "from_port": 0, "to_node": 4, "to_port": 0 },
+    { "from_node": 3, "from_port": 0, "to_node": 4, "to_port": 1 },
+    { "from_node": 4, "from_port": 0, "to_node": 6, "to_port": 0 },
+    { "from_node": 5, "from_port": 0, "to_node": 6, "to_port": 1 },
+    { "from_node": 6, "from_port": 0, "to_node": 7, "to_port": 0 }
+  ]
+}
diff --git a/src/assets/instruments/synthesizers/pad.json b/src/assets/instruments/synthesizers/pad.json
new file mode 100644
index 0000000..d7fcbe4
--- /dev/null
+++ b/src/assets/instruments/synthesizers/pad.json
@@ -0,0 +1,136 @@
+{
+  "metadata": {
+    "name": "Lush Pad",
+    "description": "Ambient pad with reverb and chorus",
+    "author": "Lightningbeam",
+    "version": 1,
+    "tags": ["pad", "ambient", "synth"]
+  },
+  "midi_targets": [0],
+  "output_node": 10,
+  "nodes": [
+    {
+      "id": 0,
+      "node_type": "MidiInput",
+      "name": "MIDI In",
+      "parameters": {},
+      "position": [100.0, 150.0]
+    },
+    {
+      "id": 1,
+      "node_type": "MidiToCV",
+      "name": "MIDI→CV",
+      "parameters": {},
+      "position": [300.0, 150.0]
+    },
+    {
+      "id": 2,
+      "node_type": "Oscillator",
+      "name": "Osc 1",
+      "parameters": {
+        "0": 440.0,
+        "1": 0.4,
+        "2": 0.0
+      },
+      "position": [500.0, 100.0]
+    },
+    {
+      "id": 3,
+      "node_type": "Oscillator",
+      "name": "Osc 2",
+      "parameters": {
+        "0": 442.0,
+        "1": 0.4,
+        "2": 0.0
+      },
+      "position": [500.0, 200.0]
+    },
+    {
+      "id": 4,
+      "node_type": "Mixer",
+      "name": "Osc Mix",
+      "parameters": {
+        "0": 1.0,
+        "1": 1.0,
+        "2": 0.0,
+        "3": 0.0
+      },
+      "position": [700.0, 150.0]
+    },
+    {
+      "id": 5,
+      "node_type": "Filter",
+      "name": "LP Filter",
+      "parameters": {
+        "0": 1500.0,
+        "1": 0.707,
+        "2": 0.0
+      },
+      "position": [900.0, 150.0]
+    },
+    {
+      "id": 6,
+      "node_type": "ADSR",
+      "name": "Amp Env",
+      "parameters": {
+        "0": 0.5,
+        "1": 0.3,
+        "2": 0.7,
+        "3": 1.0
+      },
+      "position": [900.0, 280.0]
+    },
+    {
+      "id": 7,
+      "node_type": "Gain",
+      "name": "VCA",
+      "parameters": {
+        "0": 1.0
+      },
+      "position": [1100.0, 200.0]
+    },
+    {
+      "id": 8,
+      "node_type": "Chorus",
+      "name": "Chorus",
+      "parameters": {
+        "0": 0.5,
+        "1": 0.6,
+        "2": 0.4
+      },
+      "position": [1300.0, 200.0]
+    },
+    {
+      "id": 9,
+      "node_type": "Reverb",
+      "name": "Reverb",
+      "parameters": {
+        "0": 0.7,
+        "1": 0.5,
+        "2": 0.5
+      },
+      "position": [1500.0, 200.0]
+    },
+    {
+      "id": 10,
+      "node_type": "AudioOutput",
+      "name": "Out",
+      "parameters": {},
+      "position": [1700.0, 200.0]
+    }
+  ],
+  "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 },
+    { "from_node": 1, "from_port": 0, "to_node": 3, "to_port": 0 },
+    { "from_node": 1, "from_port": 1, "to_node": 6, "to_port": 0 },
+    { "from_node": 2, "from_port": 0, "to_node": 4, "to_port": 0 },
+    { "from_node": 3, "from_port": 0, "to_node": 4, "to_port": 1 },
+    { "from_node": 4, "from_port": 0, "to_node": 5, "to_port": 0 },
+    { "from_node": 5, "from_port": 0, "to_node": 7, "to_port": 0 },
+    { "from_node": 6, "from_port": 0, "to_node": 7, "to_port": 1 },
+    { "from_node": 7, "from_port": 0, "to_node": 8, "to_port": 0 },
+    { "from_node": 8, "from_port": 0, "to_node": 9, "to_port": 0 },
+    { "from_node": 9, "from_port": 0, "to_node": 10, "to_port": 0 }
+  ]
+}