This page is read from MIDI Instrument Definitions, a Python library used in the author's other projects, in which every number is traced to a document its maker published. Its source is on GitHub.

Elektron Digitakt II MIDI implementation

The MIDI implementation of the Elektron Digitakt II: what it answers to, and the 144 controls it offers, on firmware 1.17.

At a glance

Firmware: This page describes firmware 1.17.
MIDI channel: Any one of 1 to 16.
Parts: Track, 16 of them: each on a MIDI channel of its own, taking notes and controls, with 1 voice each.
FX and Mixer: on a MIDI channel of its own, taking controls.
Voices: Each part's own, under Parts.
Note range: 0 to 84: C-1 to C6, counting middle C as C4.
Velocity: Sent and received.
Aftertouch: Answered, of a kind its documents do not say. It sends aftertouch too.
Pitch bend: Not recorded.
Program change: Received and sent, with 128 presets.
MIDI clock: Sent and received.
Start and stop: Sent and received.
Control change: 129 controls, in the tables below, 6 of them with a fine half on a second controller number.
NRPN: Supported. 136 of the controls below have one.
System exclusive: Supported.

Controls

In the order the definition gives them, by part and group. Under each control is the name a program calls it by, once pymidiinstrumentdefs.load("elektron/digitakt_ii") has loaded them.

Track

Control	CC	NRPN	Values
Mute `track_mute`	94	229 MSB 1, LSB 101	0-127
Track level `track_level`	95	228 MSB 1, LSB 100	0-127

Trig

Control	CC	NRPN	Values
Note `trig_note`	3	384 MSB 3, LSB 0	0-127
Velocity `trig_velocity`	4	385 MSB 3, LSB 1	0-127
Length `trig_length`	5	386 MSB 3, LSB 2	0-127
Filter Trig `trig_filter_trig`	13		0-127
LFO Trig `trig_lfo_trig`	14		0-127
Portamento Time `trig_portamento_time`	9	391 MSB 3, LSB 7	0-127
Portamento On/Off `trig_portamento_on_off`	65	392 MSB 3, LSB 8	0-127

Source

Control	CC	NRPN	Values
Tune `source_tune`	16	128 MSB 1, LSB 0	0-127
Play Mode `source_play_mode`	17	129 MSB 1, LSB 1	0-127
Sample Bank Select `source_sample_bank_select`	24	137 MSB 1, LSB 9	0-127
Sample Slot Select `source_sample_slot_select`	19	136 MSB 1, LSB 8	0-127
Data entry knob E (machine dependent) `source_data_entry_knob_e`	20	132 MSB 1, LSB 4	0-127
Data entry knob F (machine dependent) `source_data_entry_knob_f`	21	133 MSB 1, LSB 5	0-127
Data entry knob G (machine dependent) `source_data_entry_knob_g`	22	134 MSB 1, LSB 6	0-127
Sample Level `source_sample_level`	23	135 MSB 1, LSB 7	0-127

Filter

Control	CC	NRPN	Values
Filter Frequency `filter_frequency`	74	148 MSB 1, LSB 20	0-127
Data entry knob F (machine dependent) `filter_data_entry_knob_f`	75	149 MSB 1, LSB 21	0-127
Data entry knob G (machine dependent) `filter_data_entry_knob_g`	76	150 MSB 1, LSB 22	0-127
Env. Depth `filter_env_depth`	77	151 MSB 1, LSB 23	0-127
Attack Time `filter_attack_time`	70	144 MSB 1, LSB 16	0-127
Decay Time `filter_decay_time`	71	145 MSB 1, LSB 17	0-127
Sustain Level `filter_sustain_level`	72	146 MSB 1, LSB 18	0-127
Release Time `filter_release_time`	73	147 MSB 1, LSB 19	0-127
Env. Delay `filter_env_delay`	91	151 MSB 1, LSB 23	0-127
Key Tracking `filter_key_tracking`	92	197 MSB 1, LSB 69	0-127
Base `filter_base`	26	179 MSB 1, LSB 51	0-127
Width `filter_width`	27	180 MSB 1, LSB 52	0-127
Env. Reset `filter_env_reset`	111	196 MSB 1, LSB 68	0-127

Amp

Control	CC	NRPN	Values
Attack Time `amp_attack_time`	79	158 MSB 1, LSB 30	0-127
Hold Time `amp_hold_time`	80	159 MSB 1, LSB 31	0-127
Decay Time `amp_decay_time`	81	160 MSB 1, LSB 32	0-127
Sustain Level `amp_sustain_level`	82	161 MSB 1, LSB 33	0-127
Release Time `amp_release_time`	83	162 MSB 1, LSB 34	0-127
Env. Reset `amp_env_reset`	88	169 MSB 1, LSB 41	0-127
Mode `amp_mode`	87	168 MSB 1, LSB 40	0-127
Pan `amp_pan`	90	166 MSB 1, LSB 38	0-127
Volume `amp_volume`	89	167 MSB 1, LSB 39	0-127

Euclidean sequencer

Control	NRPN	Values
Pulse Generator 1 `euclidean_pulse_generator_1`	392 MSB 3, LSB 8	0-127
Pulse Generator 2 `euclidean_pulse_generator_2`	393 MSB 3, LSB 9	0-127
Euclidean Mode On/Off `euclidean_mode_on_off`	398 MSB 3, LSB 14	0-127
Rotation Generator 1 `euclidean_rotation_generator_1`	395 MSB 3, LSB 11	0-127
Rotation Generator 2 `euclidean_rotation_generator_2`	396 MSB 3, LSB 12	0-127
Track Rotation `euclidean_track_rotation`	397 MSB 3, LSB 13	0-127
Boolean Operator `euclidean_boolean_operator`	394 MSB 3, LSB 10	0-127

FX

Control	CC	NRPN	Values
Bit Reduction `track_fx_bit_reduction`	54		0-127
Overdrive `track_fx_overdrive`	57		0-127
Sample Rate Reduction `track_fx_sample_rate_reduction`	55		0-127
SRR Routing `track_fx_srr_routing`	56		0-127
Delay Send `track_fx_delay_send`	84	164 MSB 1, LSB 36	0-127
Reverb Send `track_fx_reverb_send`	85	165 MSB 1, LSB 37	0-127
Chorus Send `track_fx_chorus_send`	12	163 MSB 1, LSB 35	0-127

LFO 1

Control	CC	NRPN	Values
Speed `lfo_1_speed`	102 fine 58	170 MSB 1, LSB 42	0-127
Multiplier `lfo_1_multiplier`	103	171 MSB 1, LSB 43	0-127
Fade In/Out `lfo_1_fade_in_out`	104	172 MSB 1, LSB 44	0-127
Destination `lfo_1_destination`	105	173 MSB 1, LSB 45	0-127
Waveform `lfo_1_waveform`	106	174 MSB 1, LSB 46	0-127
Start Phase `lfo_1_start_phase`	107	175 MSB 1, LSB 47	0-127
Trig Mode `lfo_1_trig_mode`	108	176 MSB 1, LSB 48	0-127
Depth `lfo_1_depth`	109 fine 59	177 MSB 1, LSB 49	0-127

LFO 2

Control	CC	NRPN	Values
Speed `lfo_2_speed`	112 fine 60	178 MSB 1, LSB 50	0-127
Multiplier `lfo_2_multiplier`	113	179 MSB 1, LSB 51	0-127
Fade In/Out `lfo_2_fade_in_out`	114	180 MSB 1, LSB 52	0-127
Destination `lfo_2_destination`	115	181 MSB 1, LSB 53	0-127
Waveform `lfo_2_waveform`	116	182 MSB 1, LSB 54	0-127
Start Phase `lfo_2_start_phase`	117	183 MSB 1, LSB 55	0-127
Trig Mode `lfo_2_trig_mode`	118	184 MSB 1, LSB 56	0-127
Depth `lfo_2_depth`	119 fine 61	185 MSB 1, LSB 57	0-127

LFO 3

Control	CC	NRPN	Values
Speed `lfo_3_speed`	78 fine 62	186 MSB 1, LSB 58	0-127
Multiplier `lfo_3_multiplier`	52	187 MSB 1, LSB 59	0-127
Fade In/Out `lfo_3_fade_in_out`	53	188 MSB 1, LSB 60	0-127
Destination `lfo_3_destination`	28	189 MSB 1, LSB 61	0-127
Waveform `lfo_3_waveform`	29	190 MSB 1, LSB 62	0-127
Start Phase `lfo_3_start_phase`	30	198 MSB 1, LSB 70	0-127
Trig Mode `lfo_3_trig_mode`	31	199 MSB 1, LSB 71	0-127
Depth `lfo_3_depth`	86 fine 63	200 MSB 1, LSB 72	0-127

CC val

Control	CC	NRPN	Values
VAL1 `cc_val_val1`	70	144 MSB 1, LSB 16	0-127
VAL2 `cc_val_val2`	71	145 MSB 1, LSB 17	0-127
VAL3 `cc_val_val3`	72	146 MSB 1, LSB 18	0-127
VAL4 `cc_val_val4`	73	147 MSB 1, LSB 19	0-127
VAL5 `cc_val_val5`	74	148 MSB 1, LSB 20	0-127
VAL6 `cc_val_val6`	75	149 MSB 1, LSB 21	0-127
VAL7 `cc_val_val7`	76	150 MSB 1, LSB 22	0-127
VAL8 `cc_val_val8`	77	151 MSB 1, LSB 23	0-127
VAL9 `cc_val_val9`		188 MSB 1, LSB 60	0-127
VAL10 `cc_val_val10`		189 MSB 1, LSB 61	0-127
VAL11 `cc_val_val11`		190 MSB 1, LSB 62	0-127
VAL12 `cc_val_val12`		191 MSB 1, LSB 63	0-127
VAL13 `cc_val_val13`		192 MSB 1, LSB 64	0-127
VAL14 `cc_val_val14`		193 MSB 1, LSB 65	0-127
VAL15 `cc_val_val15`		194 MSB 1, LSB 66	0-127
VAL16 `cc_val_val16`		195 MSB 1, LSB 67	0-127

Misc

Control	CC	NRPN	Values
Pattern Mute `misc_pattern_mute`	110	232 MSB 1, LSB 104	0-127
Modulation Wheel `modulation_wheel`	1		0-127
Breath Controller `breath_controller`	2		0-127

FX and mixer

Misc

Control	CC	NRPN	Values
Master Overdrive `misc_master_overdrive`	17	293 MSB 2, LSB 37	0-127

Delay

Control	CC	NRPN	Values
Delay Time `delay_time`	21	256 MSB 2, LSB 0	0-127
Pingpong `delay_pingpong`	22	257 MSB 2, LSB 1	0-127
Stereo Width `delay_stereo_width`	23	258 MSB 2, LSB 2	0-127
Feedback `delay_feedback`	24	259 MSB 2, LSB 3	0-127
Highpass Filter `delay_highpass_filter`	25	260 MSB 2, LSB 4	0-127
Lowpass Filter `delay_lowpass_filter`	26	261 MSB 2, LSB 5	0-127
Reverb Send `delay_reverb_send`	27	262 MSB 2, LSB 6	0-127
Mix Volume `delay_mix_volume`	28	263 MSB 2, LSB 7	0-127

Reverb

Control	CC	NRPN	Values
Predelay `reverb_predelay`	29	264 MSB 2, LSB 8	0-127
Decay Time `reverb_decay_time`	30	265 MSB 2, LSB 9	0-127
Shelving Freq `reverb_shelving_freq`	31	266 MSB 2, LSB 10	0-127
Shelving Gain `reverb_shelving_gain`	89	267 MSB 2, LSB 11	0-127
Highpass Filter `reverb_highpass_filter`	90	268 MSB 2, LSB 12	0-127
Lowpass Filter `reverb_lowpass_filter`	91	269 MSB 2, LSB 13	0-127
Mix Volume `reverb_mix_volume`	92	271 MSB 2, LSB 15	0-127

Chorus

Control	CC	NRPN	Values
Depth `chorus_depth`	16	297 MSB 2, LSB 41	0-127
Speed `chorus_speed`	9	298 MSB 2, LSB 42	0-127
High Pass Filter `chorus_high_pass_filter`	70	299 MSB 2, LSB 43	0-127
Width `chorus_width`	71	300 MSB 2, LSB 44	0-127
Delay Send `chorus_delay_send`	12	301 MSB 2, LSB 45	0-127
Reverb Send `chorus_reverb_send`	13	302 MSB 2, LSB 46	0-127
Mix Volume `chorus_mix_volume`	14	303 MSB 2, LSB 47	0-127

Compressor

Control	CC	NRPN	Values
Threshold `compressor_threshold`	111	272 MSB 2, LSB 16	0-127
Attack Time `compressor_attack_time`	112	273 MSB 2, LSB 17	0-127
Release Time `compressor_release_time`	113	274 MSB 2, LSB 18	0-127
Makeup Gain `compressor_makeup_gain`	114	275 MSB 2, LSB 19	0-127
Pattern Volume `compressor_pattern_volume`	119	280 MSB 2, LSB 24	0-127
Ratio `compressor_ratio`	115	276 MSB 2, LSB 20	0-127
Sidechain Source `compressor_sidechain_source`	116	277 MSB 2, LSB 21	0-127
Sidechain Filter `compressor_sidechain_filter`	117	278 MSB 2, LSB 22	0-127
Dry/Wet Mix `compressor_dry_wet_mix`	118	279 MSB 2, LSB 23	0-127

External in mixer

Control	CC	NRPN	Values
Dual Mono `external_in_dual_mono`	82	296 MSB 2, LSB 40	0-127
Input L Level `external_in_input_l_level`	72	286 MSB 2, LSB 30	0-127
Input L Pan `external_in_input_l_pan`	74	288 MSB 2, LSB 32	0-127
Input R Level `external_in_input_r_level`	73	287 MSB 2, LSB 31	0-127
Input R Pan `external_in_input_r_pan`	75	289 MSB 2, LSB 33	0-127
Input L Delay Send `external_in_input_l_delay_send`	78	292 MSB 2, LSB 36	0-127
Input R Delay Send `external_in_input_r_delay_send`	79	291 MSB 2, LSB 35	0-127
Input L Reverb Send `external_in_input_l_reverb_send`	80	294 MSB 2, LSB 38	0-127
Input R Reverb Send `external_in_input_r_reverb_send`	81	295 MSB 2, LSB 39	0-127
Input L Chorus Send `external_in_input_l_chorus_send`	76	290 MSB 2, LSB 34	0-127
Input R Chorus Send `external_in_input_r_chorus_send`	77	291 MSB 2, LSB 35	0-127
Input L R Level `external_in_input_l_r_level`	72	286 MSB 2, LSB 30	0-127
Input L R Balance `external_in_input_l_r_balance`	74	288 MSB 2, LSB 32	0-127
Input L R Delay Send `external_in_input_l_r_delay_send`	78	292 MSB 2, LSB 36	0-127
Input L R Reverb Send `external_in_input_l_r_reverb_send`	80	294 MSB 2, LSB 38	0-127
Input L R Chorus Send `external_in_input_l_r_chorus_send`	76	290 MSB 2, LSB 34	0-127

Where these facts come from

Source documents

Digitakt II User Manual, OS 1.17, dated 24 September 2026, its user manual, read on 2 October 2026 (the file read).
Digitakt II OS Release Notes - Elektron, OS 1.17, its release notes, read on 2 October 2026 (the file read).
Digitakt II - Elektron, its download page, read on 2 October 2026 (the file read).

How they were read

User Manual, 118 pages, the edition Elektron names OS 1.17: APPENDIX B: MIDI, printed pp. 109-113, which is the whole of the control map; and from the body, pp. 11, 15, 17, 25, 38, 39, 77, 78, 79, 91 and 103.

THE APPENDIX HOLDS 144 ROWS AND 142 OF THEM ARE BELOW. The two that are not are MISC's Sample Slot and Sample Bank, which SOURCE has already given as Sample Slot Select on CC 19 and Sample Bank Select on CC 24, with the same NRPNs: the same two controls printed twice under shorter names, not two more. Two further controls are here that the appendix never lists, and the body names both with their numbers - the modulation wheel on CC 1 and the breath controller on CC 2, each assignable to up to four of a track's parameters (p. 39). A reader with only the appendix would take 1 and 2 for unassigned.

SIXTEEN TRACKS ARE ONE PART AND NOT TWO. Any track is an audio track or a MIDI track according to the machine assigned to it, so the sixteen CC VAL controls and the audio-track parameters below are two maps reached on the same sixteen channels, never both at once. That is why CC 70 is here twice, as the filter's Attack Time and as VAL1, and why eight of the CC VAL rows repeat the filter's NRPNs exactly.

THE APPENDIX GIVES TWO PARAMETERS THE SAME NRPN FOUR TIMES OVER, within one track, and this file carries all four as printed. NRPN 1:23 is both the filter's Env. Depth and its Env. Delay; 1:51 is the filter's Base and LFO 2's Multiplier; 1:52 is the filter's Width and LFO 2's Fade In/Out; and 3:8 is the trig page's Portamento On/Off and the Euclidean sequencer's Pulse Generator 1. A fifth is in the external input mixer, where 2:35 is both Input R Delay Send and Input R Chorus Send while the rows around them run in regular pairs that would put the delay send at 2:37.

THEY ARE RECORDED RATHER THAN CORRECTED, and the reason is this maker's own history. Its release notes for this instrument say "Some of the CC and NPRN values were the same for several parameters" (release_notes) against OS 1.01 and "Several of the chorus and delay parameters shared the same NRPN values" (release_notes) against 1.02, so Elektron has twice shipped a release to stop two parameters sharing a number. A pair that still shares one at 1.17 is therefore a fact about the document and possibly about the instrument, and not obviously a misprint. The CC numbers do not collide anywhere.

FIVE MORE PAIRS SHARE A NUMBER ON PURPOSE. The external input mixer is printed twice over, once for two mono inputs and once for a stereo pair, and DUAL MONO on CC 82 is the switch between them: CC 72 is Input L Level or Input L R Level, CC 74 is Input L Pan or Input L R Balance, and so on for the three sends. Both namings are below because both are what the instrument does; which one a number means is a setting, and the format has no field for that.

THE MIDI TRACKS' OWN PARAMETERS ARE NOT CONTROLS AND ARE NOT BELOW. A MIDI track sends bank select on CC 0 and CC 32, program change, pitch bend, aftertouch, modulation and breath (p. 103); those are messages it emits on a channel of the player's choosing, not numbers it answers to. Aftertouch among them is why aftertouch_transmits is true.

AFTERTOUCH AND PITCH BEND ARE BOTH RECEIVED AND NEITHER IS CHARACTERISED. The AFTERTOUCH menu "[o]pens a menu where you can assign up to four PARAMETER page parameters to the MIDI aftertouch command" (p. 39), and PITCH BEND the same, where "[t]he pitch bend from incoming MIDI sent to the Digitakt II from external devices affects the assigned parameters" (p. 39). The manual never says whether the aftertouch is channel pressure or polyphonic key pressure, so voice.aftertouch says received and no more; and the bend reaches assigned parameters by a depth setting rather than a range in semitones, so there is no pitch_bend block to put a number in.

SIX CONTROLS ARE 14-BIT AND NOT ONE OF THE SIX PAIRS IS THE STANDARD ONE. "Note that the LFO 1/2/3 speed and depth are high-resolution parameters, with CC LSB values" (p. 110), and the appendix gives those LSBs as 58 to 63. The specification makes CC n+32 the LSB of CC n for n of 0 to 31, so 58 to 63 are the LSBs of 26 to 31 - and this instrument uses CC 26, 27, 28, 29, 30 and 31 as six independent parameters of its own, the filter's Base and Width and four of LFO 3's. The pairs below are the maker's, and a consumer that applies the specification's rule instead will move the wrong thing. They are the only six controls here with an lsb.

THE APPENDIX SKIPS ONE NRPN AND NOTHING SAYS WHY. The reverb runs 2:8 to 2:13 and then puts Mix Volume at 2:15, with nothing on 2:14. Read twice, the second time at 600 dpi.

NOT RECORDED:

a pitch bend range in semitones;
which kind of aftertouch;
and any mode, because Elektron publishes no MIDI implementation chart for this instrument and the appendix is a parameter table rather than a chart.