This definition has been reviewed by the manufacturer. discoDSP OB-Xd 2 MIDI CCs & NRPNs

MIDI implementation details for the discoDSP OB-Xd 2.

Last update: April 24, 2026 • 74 parameters

Contributions welcome! You can email us your edited CSV if you don't want to use GitHub.

Global

Parameter CC Range Usage Description Orientation
Voice Count 15 [0–127]
1~32: Voice count
Polyphony / number of voices
Note: Voice count = round(value/127 * 31) + 1.
0-based
Unison 16 [0–127]
0-63: Off; 64-127: On
Unison enable
Note: Threshold at 64.
0-based
Octave 17 [0–127]
0-15: -2 oct; 16-47: -1 oct; 48-79: 0; 80-111: +1 oct; 112-127: +2 oct
Master octave
Note: Octave = (round(value/127 * 4) - 2) * 12 semitones.
Centered
As Played Allocation 21 [0–127]
0-63: Round-robin; 64-127: As-played
Voice allocation mode
Note: Threshold at 64.
0-based
Portamento 23 [0–127]
0~127: Instant to slowest glide
Portamento time
Note: Logarithmic 0.14~250 ms scaled internally.
0-based
Unison Detune 24 [0–127]
0~127: No detune to maximum
Unison voice detune
0-based
Tune 33 [0–127]
0~127: -100 to +100 cents
Master fine tune
Note: Maps to -1~+1 internally.
Centered
Legato Mode 35 [0–127]
0-21: Mode 0; 22-63: Mode 1; 64-105: Mode 2; 106-127: Mode 3
Mono/legato mode
Note: LegatoMode = round(value/127 * 3 + 1) - 1.
0-based
Volume 71 [0–127]
0~127: Silence to full output
Master volume
Note: Linear 0~0.30 internally.
0-based
Pitch Bend LFO Rate 75 [0–127]
0: Off; 1~127: Slowest to fastest vibrato rate
Vibrato LFO rate (mod wheel)
Note: Vibrato enabled when value > 6.
0-based
Economy Mode 111 [0–127]
0-63: Off; 64-127: On
CPU economy mode (skip inactive voices)
Note: Threshold at 64.
0-based

Filter

Parameter CC Range Usage Description Orientation
Filter Warm 18 [0–127]
0-63: Off; 64-127: On
Oversampling enable (warm filter)
Note: Threshold at 64; toggles oversampling.
0-based
Resonance 42 [0–127]
0~127: No resonance to maximum Q
Filter resonance
0-based
Cutoff 74 [0–127]
0~127: Fully closed to fully open
Filter cutoff
Note: Linear 0~120 internally.
0-based
Filter Key Follow 103 [0–127]
0~127: No tracking to full tracking
Filter cutoff keyboard tracking
0-based
Multimode 104 [0–127]
0~127: Low-pass to High-pass (centre = Band-pass)
Filter multimode (LP to HP)
Note: Continuous LP to HP morph.
0-based
Bandpass Blend 105 [0–127]
0-63: Off; 64-127: On
Bandpass mode enable
Note: Threshold at 64.
0-based
Four Pole 106 [0–127]
0-63: Off (2-pole / 12 dB); 64-127: On (4-pole / 24 dB)
4-pole filter mode (24dB/oct) enable
Note: Threshold at 64.
0-based
Filter Env Amount 107 [0–127]
0~127: No modulation to maximum
Filter envelope modulation amount
Note: Linear 0~140 internally.
0-based
Self Osc Push 119 [0–127]
0-63: Off; 64-127: On
Filter self-oscillation push
Note: Threshold at 64.
0-based

LFO

Parameter CC Range Usage Description Orientation
LFO Frequency 19 [0–127]
0~127: Slowest to fastest
LFO rate
Note: Logarithmic 0~50 Hz scaled internally.
0-based
LFO Amount 1 22 [0–127]
0~127: No modulation to maximum
LFO modulation depth 1
0-based
LFO Amount 2 25 [0–127]
0~127: No modulation to maximum
LFO modulation depth 2 (PW)
0-based
LFO Sine Wave 44 [0–127]
0-63: Off; 64-127: On
LFO sine waveform enable
Note: Threshold at 64; OR'd into LFO waveform bitmask.
0-based
LFO Square Wave 45 [0–127]
0-63: Off; 64-127: On
LFO square waveform enable
Note: Threshold at 64; OR'd into LFO waveform bitmask.
0-based
LFO S&H Wave 46 [0–127]
0-63: Off; 64-127: On
LFO sample-and-hold waveform enable
Note: Threshold at 64; OR'd into LFO waveform bitmask.
0-based
LFO to Osc 1 Pitch 47 [0–127]
0-63: Off; 64-127: On
LFO target oscillator 1 pitch
Note: Threshold at 64.
0-based
LFO to Osc 2 Pitch 48 [0–127]
0-63: Off; 64-127: On
LFO target oscillator 2 pitch
Note: Threshold at 64.
0-based
LFO to Filter 49 [0–127]
0-63: Off; 64-127: On
LFO target filter cutoff
Note: Threshold at 64.
0-based
LFO to PW Osc 1 50 [0–127]
0-63: Off; 64-127: On
LFO target oscillator 1 pulse width
Note: Threshold at 64.
0-based
LFO to PW Osc 2 51 [0–127]
0-63: Off; 64-127: On
LFO target oscillator 2 pulse width
Note: Threshold at 64.
0-based

Envelope

Parameter CC Range Usage Description Orientation
Volume Env Velocity 20 [0–127]
0~127: No velocity to full velocity
Amp envelope velocity sensitivity
0-based
Loudness Decay 36 [0–127]
0~127: Near-instant to slowest
Amp envelope decay
Note: Logarithmic 4~60000 ms.
0-based
Loudness Sustain 37 [0–127]
0~127: No sustain to full sustain
Amp envelope sustain
0-based
Filter Attack 38 [0–127]
0~127: Near-instant to slowest
Filter envelope attack
Note: Logarithmic 4~60000 ms.
0-based
Filter Decay 39 [0–127]
0~127: Near-instant to slowest
Filter envelope decay
Note: Logarithmic 4~60000 ms.
0-based
Filter Sustain 40 [0–127]
0~127: No sustain to full sustain
Filter envelope sustain
0-based
Filter Release 41 [0–127]
0~127: Near-instant to slowest
Filter envelope release
Note: Logarithmic 8~60000 ms.
0-based
Env to Pitch 63 [0–127]
0~127: No mod to maximum
Filter envelope to pitch amount
Note: Maps to 0~36 internally.
0-based
Loudness Attack 73 [0–127]
0~127: Near-instant to slowest
Amp envelope attack
Note: Logarithmic 4~60000 ms.
0-based
Loudness Release 72 [0–127]
0~127: Near-instant to slowest
Amp envelope release
Note: Logarithmic 8~60000 ms.
0-based
Filter Env Velocity 76 [0–127]
0~127: No velocity to full velocity
Filter envelope velocity sensitivity
0-based
PW Env 113 [0–127]
0~127: No modulation to maximum
Pulse width envelope amount
0-based
PW Env Both 114 [0–127]
0-63: Osc 1 only; 64-127: Both oscillators
Apply PW envelope to both oscillators
Note: Threshold at 64.
0-based
Env Pitch Both 115 [0–127]
0-63: Osc 1 only; 64-127: Both oscillators
Apply pitch envelope to both oscillators
Note: Threshold at 64.
0-based
Filter Env Invert 116 [0–127]
0-63: Normal; 64-127: Inverted
Invert filter envelope
Note: Threshold at 64.
0-based

Oscillator

Parameter CC Range Usage Description Orientation
Osc 2 Detune 43 [0–127]
0~127: No detune to maximum
Oscillator 2 detune
Note: Logarithmic 0.001~0.6.
0-based
Osc 2 Hard Sync 52 [0–127]
0-63: Off; 64-127: On
Oscillator 2 hard sync to osc 1
Note: Threshold at 64.
0-based
Cross Mod 53 [0–127]
0~127: No cross-mod to maximum
Osc 2 cross modulation amount
Note: Maps to 0~24 internally.
0-based
Osc 1 Pitch 54 [0–127]
0~127: 0 to +48 semitones
Oscillator 1 pitch offset (semitones)
Note: Maps to 0~48 semitones.
0-based
Osc 2 Pitch 55 [0–127]
0~127: 0 to +48 semitones
Oscillator 2 pitch offset (semitones)
Note: Maps to 0~48 semitones.
0-based
Pitch Quantize 56 [0–127]
0-63: Off; 64-127: On
Quantize osc pitch to semitones
Note: Threshold at 64.
0-based
Osc 1 Saw 57 [0–127]
0-63: Off; 64-127: On
Oscillator 1 saw waveform enable
Note: Threshold at 64.
0-based
Osc 1 Pulse 58 [0–127]
0-63: Off; 64-127: On
Oscillator 1 pulse waveform enable
Note: Threshold at 64.
0-based
Osc 2 Saw 59 [0–127]
0-63: Off; 64-127: On
Oscillator 2 saw waveform enable
Note: Threshold at 64.
0-based
Osc 2 Pulse 60 [0–127]
0-63: Off; 64-127: On
Oscillator 2 pulse waveform enable
Note: Threshold at 64.
0-based
Pulse Width 61 [0–127]
0~127: Narrow to wide
Oscillator pulse width
0-based
Brightness 62 [0–127]
0~127: Dark to bright
Oscillator brightness
Note: Linear 7000~26000 internally.
0-based
Osc 1 Mix 77 [0–127]
0~127: Silent to full level
Oscillator 1 level
0-based
Osc 2 Mix 78 [0–127]
0~127: Silent to full level
Oscillator 2 level
0-based
Noise Mix 102 [0–127]
0~127: Silent to full noise
Noise level
Note: Logarithmic 0~1 (35 internally).
0-based
PW Osc 2 Offset 117 [0–127]
0~127: No offset to maximum offset
Pulse width offset for oscillator 2
0-based
Level Difference 118 [0–127]
0~127: No variation to maximum
Loudness detune (per-voice level variation)
0-based

Pan

Parameter CC Range Usage Description Orientation
Pan Voice 1 81 [0–127]
0~63: Left; 64: Center; 65~127: Right
Voice 1 pan position
Centered
Pan Voice 2 82 [0–127]
0~63: Left; 64: Center; 65~127: Right
Voice 2 pan position
Centered
Pan Voice 3 83 [0–127]
0~63: Left; 64: Center; 65~127: Right
Voice 3 pan position
Centered
Pan Voice 4 84 [0–127]
0~63: Left; 64: Center; 65~127: Right
Voice 4 pan position
Centered
Pan Voice 5 85 [0–127]
0~63: Left; 64: Center; 65~127: Right
Voice 5 pan position
Centered
Pan Voice 6 86 [0–127]
0~63: Left; 64: Center; 65~127: Right
Voice 6 pan position
Centered
Pan Voice 7 87 [0–127]
0~63: Left; 64: Center; 65~127: Right
Voice 7 pan position
Centered
Pan Voice 8 88 [0–127]
0~63: Left; 64: Center; 65~127: Right
Voice 8 pan position
Centered

Variation

Parameter CC Range Usage Description Orientation
Envelope Detune 108 [0–127]
0~127: No variation to maximum
Per-voice envelope time variation
0-based
Filter Detune 109 [0–127]
0~127: No variation to maximum
Per-voice filter detune variation
0-based
Portamento Detune 110 [0–127]
0~127: No variation to maximum
Per-voice portamento variation
0-based

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