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 Analog Rytm MKII MIDI implementation

The MIDI implementation of the Elektron Analog Rytm MKII: what it answers to, and the 99 controls it offers, on firmware 1.74.

At a glance

Firmware: This page describes firmware 1.74.
MIDI channel: Any one of 1 to 16.
Parts: Track, 12 of them: each on a MIDI channel of its own, taking notes and controls.
FX Track: on a MIDI channel of its own, taking controls.
Performance: on a MIDI channel of its own.
Voices: 8, shared by the parts that play notes.
Note range: 0 to 59: C-1 to B3, 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: 99 controls, in the tables below, 1 of them with a fine half on a second controller number.
NRPN: Supported. 99 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/analog_rytm_mkii") has loaded them.

Track

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
Synth Trig `trig_synth_trig`	11	387 MSB 3, LSB 3	0-127
Sample Trig `trig_sample_trig`	12	388 MSB 3, LSB 4	0-127
ENV Trig `trig_env_trig`	13	389 MSB 3, LSB 5	0-127
LFO TRIG `trig_lfo_trig`	14	390 MSB 3, LSB 6	0-127

Euclidean

Control	CC	NRPN	Values
Pulse Generator 1 `euclidean_pulse_generator_1`	86	392 MSB 3, LSB 8	0-127
Pulse Generator 2 `euclidean_pulse_generator_2`	87	393 MSB 3, LSB 9	0-127
Euclidean on/off `euclidean_on_off`	117	398 MSB 3, LSB 14	0-127
Rotation Generator 1 `euclidean_rotation_generator_1`	89	395 MSB 3, LSB 11	0-127
Rotation Generator 2 `euclidean_rotation_generator_2`	90	396 MSB 3, LSB 12	0-127
Track Rotation `euclidean_track_rotation`	91	397 MSB 3, LSB 13	0-127
Boolean Operator `euclidean_boolean_operator`	88	394 MSB 3, LSB 10	0-127

Common

Control	CC	NRPN	Values
Track Level `track_level`	95	228 MSB 1, LSB 100	0-127
Track Mute (seq. mute) `track_mute`	94	229 MSB 1, LSB 101	0-127
Track Solo (seq. mute) `track_solo`	93	230 MSB 1, LSB 102	0-127
Track Machine Type `track_machine_type`	15	231 MSB 1, LSB 103	0-127
Active Scene `active_scene`	92	232 MSB 1, LSB 104	0-127

Synth

Control	CC	NRPN	Values
Synth Parameter 1 `synth_parameter_1`	16	128 MSB 1, LSB 0	0-127
Synth Parameter 2 `synth_parameter_2`	17	129 MSB 1, LSB 1	0-127
Synth Parameter 3 `synth_parameter_3`	18	130 MSB 1, LSB 2	0-127
Synth Parameter 4 `synth_parameter_4`	19	131 MSB 1, LSB 3	0-127
Synth Parameter 5 `synth_parameter_5`	20	132 MSB 1, LSB 4	0-127
Synth Parameter 6 `synth_parameter_6`	21	133 MSB 1, LSB 5	0-127
Synth Parameter 7 `synth_parameter_7`	22	134 MSB 1, LSB 6	0-127
Synth Parameter 8 `synth_parameter_8`	23	135 MSB 1, LSB 7	0-127

Sample

Control	CC	NRPN	Values
Sample Tune `sample_tune`	24	136 MSB 1, LSB 8	0-127
Sample Fine tune `sample_fine_tune`	25	137 MSB 1, LSB 9	0-127
Sample Bit Reduction `sample_bit_reduction`	26	138 MSB 1, LSB 10	0-127
Sample Slot `sample_slot`	27	139 MSB 1, LSB 11	0-127
Sample Start `sample_start`	28	140 MSB 1, LSB 12	0-127
Sample End `sample_end`	29	141 MSB 1, LSB 13	0-127
Sample Loop `sample_loop`	30	142 MSB 1, LSB 14	0-127
Sample Level `sample_level`	31	143 MSB 1, LSB 15	0-127

Filter

Control	CC	NRPN	Values
Filter Attack Time `filter_attack_time`	70	144 MSB 1, LSB 16	0-127
Filter Decay Time `filter_decay_time`	71	145 MSB 1, LSB 17	0-127
Filter Sustain Level `filter_sustain_level`	72	146 MSB 1, LSB 18	0-127
Filter Release Time `filter_release_time`	73	147 MSB 1, LSB 19	0-127
Filter Frequency `filter_frequency`	74	148 MSB 1, LSB 20	0-127
Filter Resonance `filter_resonance`	75	149 MSB 1, LSB 21	0-127
Filter Mode `filter_mode`	76	150 MSB 1, LSB 22	0-127
Filter Env Depth `filter_env_depth`	77	151 MSB 1, LSB 23	0-127

Amp

Control	CC	NRPN	Values
Amp Attack Time `amp_attack_time`	78	152 MSB 1, LSB 24	0-127
Amp Hold Time `amp_hold_time`	79	153 MSB 1, LSB 25	0-127
Amp Decay Time `amp_decay_time`	80	154 MSB 1, LSB 26	0-127
Amp Overdrive `amp_overdrive`	81	155 MSB 1, LSB 27	0-127
Amp Delay Send `amp_delay_send`	82	156 MSB 1, LSB 28	0-127
Amp Reverb Send `amp_reverb_send`	83	157 MSB 1, LSB 29	0-127
Amp Pan `amp_pan`	10	158 MSB 1, LSB 30	0-127
Amp Volume `amp_volume`	7	159 MSB 1, LSB 31	0-127

LFO

Control	CC	NRPN	Values
LFO Speed `lfo_speed`	102	160 MSB 1, LSB 32	0-127
LFO Multiplier `lfo_multiplier`	103	161 MSB 1, LSB 33	0-127
LFO Fade In/Out `lfo_fade_in_out`	104	162 MSB 1, LSB 34	0-127
LFO Destination `lfo_destination`	105	163 MSB 1, LSB 35	0-127
LFO Waveform `lfo_waveform`	106	164 MSB 1, LSB 36	0-127
LFO Start Phase `lfo_start_phase`	107	165 MSB 1, LSB 37	0-127
LFO Trig Mode `lfo_trig_mode`	108	166 MSB 1, LSB 38	0-127
LFO Depth `lfo_depth`	109 fine 118	167 MSB 1, LSB 39	0-127

Performance

Control	CC	NRPN	Values
Performance Parameter 1 `performance_parameter_1`	35	0 MSB 0, LSB 0	0-127
Performance Parameter 2 `performance_parameter_2`	36	1 MSB 0, LSB 1	0-127
Performance Parameter 3 `performance_parameter_3`	37	2 MSB 0, LSB 2	0-127
Performance Parameter 4 `performance_parameter_4`	39	3 MSB 0, LSB 3	0-127
Performance Parameter 5 `performance_parameter_5`	40	4 MSB 0, LSB 4	0-127
Performance Parameter 6 `performance_parameter_6`	41	5 MSB 0, LSB 5	0-127
Performance Parameter 7 `performance_parameter_7`	42	6 MSB 0, LSB 6	0-127
Performance Parameter 8 `performance_parameter_8`	43	7 MSB 0, LSB 7	0-127
Performance Parameter 9 `performance_parameter_9`	44	8 MSB 0, LSB 8	0-127
Performance Parameter 10 `performance_parameter_10`	45	9 MSB 0, LSB 9	0-127
Performance Parameter 11 `performance_parameter_11`	46	10 MSB 0, LSB 10	0-127
Performance Parameter 12 `performance_parameter_12`	47	11 MSB 0, LSB 11	0-127

FX track

Delay

Control	CC	NRPN	Values
Delay Time `delay_time`	16	256 MSB 2, LSB 0	0-127
Delay Pingpong `delay_pingpong`	17	257 MSB 2, LSB 1	0-127
Delay Stereo Width `delay_stereo_width`	18	258 MSB 2, LSB 2	0-127
Delay Feedback `delay_feedback`	19	259 MSB 2, LSB 3	0-127
Delay Highpass Filter `delay_highpass_filter`	20	260 MSB 2, LSB 4	0-127
Delay Lowpass Filter `delay_lowpass_filter`	21	261 MSB 2, LSB 5	0-127
Delay Reverb Send `delay_reverb_send`	22	262 MSB 2, LSB 6	0-127
Delay Mix Volume `delay_mix_volume`	23	263 MSB 2, LSB 7	0-127

Reverb

Control	CC	NRPN	Values
Reverb Predelay `reverb_predelay`	24	264 MSB 2, LSB 8	0-127
Reverb Decay Time `reverb_decay_time`	25	265 MSB 2, LSB 9	0-127
Reverb Shelving Freq `reverb_shelving_freq`	26	266 MSB 2, LSB 10	0-127
Reverb Shelving Gain `reverb_shelving_gain`	27	267 MSB 2, LSB 11	0-127
Reverb Highpass Filter `reverb_highpass_filter`	28	268 MSB 2, LSB 12	0-127
Reverb Lowpass Filter `reverb_lowpass_filter`	29	269 MSB 2, LSB 13	0-127
Reverb Mix Volume `reverb_mix_volume`	31	271 MSB 2, LSB 15	0-127

Distortion

Control	CC	NRPN	Values
Dist Amount `dist_amount`	70	272 MSB 2, LSB 16	0-127
Dist Symmetry `dist_symmetry`	71	273 MSB 2, LSB 17	0-127
Delay Overdrive `delay_overdrive`	72	274 MSB 2, LSB 18	0-127
Delay Dist/Comp Routing (pre/post) `delay_dist_comp_routing`	76	278 MSB 2, LSB 22	0-127
Reverb Dist/Comp Routing (pre/post) `reverb_dist_comp_routing`	77	279 MSB 2, LSB 23	0-127

Compressor

Control	CC	NRPN	Values
Compressor Threshold `compressor_threshold`	78	280 MSB 2, LSB 24	0-127
Compressor Attack Time `compressor_attack_time`	79	281 MSB 2, LSB 25	0-127
Compressor Release Time `compressor_release_time`	80	282 MSB 2, LSB 26	0-127
Compressor Makeup Gain `compressor_makeup_gain`	81	283 MSB 2, LSB 27	0-127
Compressor Ratio `compressor_ratio`	82	284 MSB 2, LSB 28	0-127
Compressor Sidechain EQ `compressor_sidechain_eq`	83	285 MSB 2, LSB 29	0-127
Compressor Dry/Wet Mix `compressor_dry_wet_mix`	84	286 MSB 2, LSB 30	0-127
Compressor Output Volume `compressor_output_volume`	85	287 MSB 2, LSB 31	0-127

Where these facts come from

Source documents

Analog Rytm MKII User Manual, OS 1.74, dated 24 September 2026, its user manual, read on 2 October 2026 (the file read).
Analog Rytm MKII OS Release Notes - Elektron, OS 1.74, its release notes, read on 2 October 2026 (the file read).

How they were read

User manual (114pp), OS 1.74: pp. 9, 13, 15, 21-22, 31, 34-35, 41, 61-63, and the CC and NRPN tables of APPENDIX C: MIDI at pp. 85-95, which is where every number here comes from.

THE MIDI APPENDIX IS C ON THIS INSTRUMENT, not B. On this maker's Digitone, Digitakt and Syntakt it is APPENDIX B; here B is the FX track's parameters and C is MIDI. The tool that reads these tables takes the letter as an argument for that reason, because a pattern that matches nothing reports success.

THE APPENDIX PRINTS 319 ROWS IN EIGHT NUMBERED SECTIONS AND 99 ARE BELOW. The other 220 are C.8 MACHINE PARAMETERS, which names what each of 32 drum machines puts on the eight synth-page knobs - and every one of them reuses CC 16 to 23 and NRPN 1/0 to 1/7, the same eight numbers C.5 already publishes as Synth Parameter 1 to 8. What picks between the 32 meanings is Track Machine Type, a per-track setting which is itself CC 15 below. It is not a channel, so a part cannot tell them apart, and the format has no way to say that a meaning holds only while a setting does. Carrying all 220 would ship 32 controls each claiming CC 16 with nothing to choose between them. So the eight generic slots stand and the 220 are recorded in this instrument's own document instead, with the question of what the format should grow left open.

NOT ONE NUMBER IS LOST: the full extraction is kept beside the two readings that agreed on it.

THE SAME NUMBERS MEAN DIFFERENT THINGS ON DIFFERENT PARTS, which is why every control below names one. 26 of the controller numbers used here carry two meanings: CC 16 is Synth Parameter 1 on a track and Delay Time on the FX track, CC 70 is the filter's attack time on a track and the distortion amount on the FX track. The NRPNs do resolve it where the CCs do not - the track parameters are NRPN bank 1, the FX bank 2, the trig parameters bank 3 and the performance macros bank 0 - so a sender using NRPN needs no part and a sender using CC does. The Syntakt has the same shape and 28 such numbers.

EVERY ROW OF THE SEVEN CARRIED SECTIONS IS BELOW: C.1 GENERAL TRIG PARAMETERS 7, C.2 EUCLIDEAN SEQUENCER PARAMETERS 7, C.3 GENERAL KIT PARAMETERS 5, C.4 PERFORMANCE PARAMETERS 12, C.5 GENERAL SYNTH PARAMETERS 32, C.6 LFO PARAMETERS 8, C.7 FX PARAMETERS 28. The appendix gives names and numbers only - no values, bands, ranges or defaults - so every control here is continuous by derivation.

THE APPENDIX DESCRIBES ITS OWN ONE EXCEPTION CORRECTLY, which is worth saying because this maker's other manual does not: "Note that the LFO depth is a high-resolution parameter, with CC LSB value" (p. 87), and exactly one row carries a CC LSB. Elektron does not use the MMA's LSB = MSB + 32 for it either: the fine half of 109 is 118.

THE MAKER'S OWN SLIPS, REPRODUCED AND NOT TIDIED. Two sections are both numbered C.8, MACHINE PARAMETERS at p. 88 and MIDI NOTE TRIGGERS at p. 95. One parameter is printed in capitals where its seven neighbours are not, LFO TRIG. Three runs of controller numbers skip a value with nothing said about it: the performance macros run 35, 36, 37, 39 - no 38 - and the reverb has no 30 and the distortion no 73 to 75. The trig parameters skip 6 to 10 while their NRPN column runs unbroken. The Euclidean rows are printed out of controller order, with Euclidean on/off at 117 between 87 and 89, and they are kept in the order the manual prints them.

NOT RECORDED:

values, bands and defaults, which this appendix does not give;
what any machine puts on each of the eight synth knobs, which is the 220 rows above;
and whether the performance macros can be driven from outside as well as sent, since "PERF CHANNEL selects the MIDI channel the knobs will send MIDI data on when PERFORMANCE mode is active" (p. 63) says only the one direction, while RECEIVE CC/NRPN is a global setting that "make[s] it possible to control Analog Rytm MKII parameters from an external MIDI device sending CC/NRPN data" (p. 63).

The twelve are carried as controls because they have numbers; what the part receives is left unsaid rather than guessed.