Purpose

Drum is a fully synthesized drum instrument that produces kick, snare, clap, hi-hats, toms, rim, crash, ride, and percussion sounds from four distinct kit characters. No samples needed. Wire triggers from Groove, Step, or a MIDI controller and get a complete stereo drum mix.

Use

Wire note_lanes_f32_v1 from Groove or Step, note_voices_f32_v1 from MIDI Note, or midi_event_v1 from MIDI Capture into the triggers input. The node auto-detects the input type. Choose a kit, tune the kick and snare, and shape the overall character with the global controls. Wire the stereo output to Device Out or a mixer.

Inputs and outputs

• Input 0: triggers — note_lanes_f32_v1, note_voices_f32_v1, or midi_event_v1 (required). Trigger source. Accepts any of the three types; auto-detected per block.
• Output 0: out — stereo audio (PCM f32).

Controls

• Kit — Kit character: analog_808 (round, warm, classic), punchy_909 (tight, punchy, bright), glitch_modular (harsh, aliased, raw), dusty_house (soft, warm, lo-fi).
• Gain — Master output level.
• Drive — Post-mix saturation.
• Tone — Master brightness filter (LP cutoff across the full mix).
• Decay — Global decay length multiplier for all elements.
• Punch — Transient attack intensity. Affects kick pitch drop, snare snap, and tom stick.
• Noise — Snare wire and clap noise level.
• Metal — Hi-hat and cymbal metallic content (shifts square-wave partial frequencies).
• Crush — Bit-crush amount applied per voice before mixing.
• Width — Stereo spread. Each drum element has a fixed pan position (kick/snare center, hats right, crash wide right, ride left) scaled by this parameter.
• Kicktune — Kick fundamental frequency in Hz (28-95 Hz range).
• Snaretune — Snare body pitch in Hz (120-320 Hz range).
• Limiter — Output safety limiter.

Notes

• Uses GM-style note mapping: 36 = kick, 38/40 = snare, 42/44 = closed hat, 46 = open hat, 39 = clap, 41/43/45/47/48 = toms. Notes outside the GM range fall back to pitch-class heuristics.
• Hi-hat choke group: a closed hat trigger chokes any sounding open hat.
• Up to 40 simultaneous voices with oldest-voice stealing.
• Each drum element is a multi-stage synthesis chain (oscillators, pitch envelopes, resonant filters, noise, waveshaping) tuned per kit.

Ports

Inputs

• triggers row required
  note_voices_f32_v1note_lanes_f32_v1midi_event_v1

Outputs

• out row
  audio_pcm_f32_stereo_v1

Parameters

Kit (Kit) Menu op('drum').par.Kit

Default:

big_room

Options:

studio_natural, big_room, analog_808, punchy_909, dusty_break, machine_glitch

Kickmodel (Kickmodel) Menu op('drum').par.Kickmodel

Default:

kit_default

Options:

kit_default, acoustic, analog_808, punchy_909, hybrid

Snaremodel (Snaremodel) Menu op('drum').par.Snaremodel

Default:

kit_default

Options:

kit_default, acoustic, analog_808, punchy_909, hybrid

Hatmodel (Hatmodel) Menu op('drum').par.Hatmodel

Default:

kit_default

Options:

kit_default, acoustic, analog_808, punchy_909, hybrid

Tommodel (Tommodel) Menu op('drum').par.Tommodel

Default:

kit_default

Options:

kit_default, acoustic, analog_808, punchy_909, hybrid

Cymbalmodel (Cymbalmodel) Menu op('drum').par.Cymbalmodel

Default:

kit_default

Options:

kit_default, acoustic, electronic, hybrid

Sublayer (Sublayer) Float op('drum').par.Sublayer

Default:

0.5

Range:

0 to 1

Cracklayer (Cracklayer) Float op('drum').par.Cracklayer

Default:

0.5

Range:

0 to 1

Gain (Gain) Float op('drum').par.Gain

Default:

0.72

Range:

0 to 2

Punch (Punch) Float op('drum').par.Punch

Default:

0.6

Range:

0 to 1

Tone (Tone) Float op('drum').par.Tone

Default:

0.5

Range:

0 to 1

Decay (Decay) Float op('drum').par.Decay

Default:

0.5

Range:

0 to 1

Noise (Noise) Float op('drum').par.Noise

Default:

0.5

Range:

0 to 1

Metal (Metal) Float op('drum').par.Metal

Default:

0.5

Range:

0 to 1

Dynamics (Dynamics) Float op('drum').par.Dynamics

Default:

0.7

Range:

0 to 1

Humanize (Humanize) Float op('drum').par.Humanize

Default:

0.35

Range:

0 to 1

Seed (Seed) Int op('drum').par.Seed

Default:

1234

Range:

1 to 9999

Kicktune (Kicktune) Float op('drum').par.Kicktune

Default:

52

Range:

30 to 90

Snaretune (Snaretune) Float op('drum').par.Snaretune

Default:

196

Range:

120 to 320

Tomtune (Tomtune) Float op('drum').par.Tomtune

Default:

0

Range:

-12 to 12

Cymbaltune (Cymbaltune) Float op('drum').par.Cymbaltune

Default:

0

Range:

-12 to 12

Drive (Drive) Float op('drum').par.Drive

Default:

0.25

Range:

0 to 2

Crush (Crush) Float op('drum').par.Crush

Default:

0

Range:

0 to 1

Width (Width) Float op('drum').par.Width

Default:

0.8

Range:

0 to 1

Room (Room) Float op('drum').par.Room

Default:

0.22

Range:

0 to 1

Glue (Glue) Float op('drum').par.Glue

Default:

0.4

Range:

0 to 1

Air (Air) Float op('drum').par.Air

Default:

0.3

Range:

0 to 1

Limiter (Limiter) Toggle op('drum').par.Limiter

Default:

On

Options:

Off, On