MIDI Manufacturer ID for Arturia is 0x00 0x20 0x6B.
F0 <ID number> <Device ID> <Sub ID#1> <Sub ID#2> ... F7
ID Number:
- 0x7D is reserved for non-commercial use and is not to be used on any product released to the public;
- 0x7E (Non Real Time) 0x7F (Real Time) are used for extensions to the MIDI specification, and are known as Universal System Exclusive ID numbers.
Request:
F0 7E 7F 06 01 F7
F0 start
7E ID number 7E = non real-time
7F device ID 7F = all devices
06 sub#1 06 = General System Information
01 sub#2 01 = Device Identity Request
Answer:
F0
7E 7F 06
02 sub#2: 02 = Device Identity Reply
00 20 6B Arturia ID
06 00 06 01 01 01 02 06
F7
Exemple with preset 200:
In the sysex messages, the preset number is 0-indexed, so, the 200th preset is number 199.
The preset number is represented by two bytes. The first one is the bank, the second one the preset in the bank. One bank contains 128 presets.
bank number = preset > 127 ? 1 : 0
preset in bank = preset % 128
199 > 127 --> 1 = 0x01
199 % 128 --> 71 = 0x47
The 200th preset is therefore represent with 0x01 0x47 in the sysex messages.
F0 00 20 6B 07 01 <seq#> <len> <msg type> <len# number of data bytes> F7
The <seq#> is a the sequence number that the sender has provided in its request. The MF simply echo back this
number in its answer. This allows to put the answers in the correct order.
The byte following the MIDI ID, 0x07, is probably the code representing the MicroFreak.
04 : MiniBrute
06 : MatrixBrute
07 : MicroFreak
Request:
F0 00 20 6B 07 01 <seq#> 03 19 <bank#> <preset#> 00 F7
03 is number of data bytes
19 is read cmd
Answer:
code must be 52 after length byte
F0 00 20 6B 07 01 00 23 52 00 00 00 00 00 00 00 00 00 00 08 10 44 69 73 72 65 73 70 65 63 74 66 ...
^^ ^^-number of data bytes ^^-preset ^^-start of name
|| number
++-sequence #
44 69 73 72 65 73 70 65 63 74 66 => D i s r e s p e c t
How to read a preset (a patch).
- Send a "start preset dump request" message
- Send multiples "preset data request" messages until the answer indicates that all data have been sent.
This message must be sent once.
F0 00 20 6B 07 01 <seq#> 01 19 <bank#> <preset#> 01 F7
This message must be sent multiple times, until the answer indicates that no more data are to follow.
F0 00 20 6B 07 01 <seq#> 01 18 00 F7
Answer:
F0 00 20 6B 07 01 <seq#> 20 16 00 23 56 43 4F 44 54 79 00 70 65 63 0C 00 40 46 00 50 61 72 61 6D 31 63 03 6E 3F 29 46 50 61 72 F7
^^-not the last packet, continue to read, there are still data
F0 00 20 6B 07 01 <seq#> 20 17 00 23 56 43 4F 44 54 79 00 70 65 63 0C 00 40 46 00 50 61 72 61 6D 31 63 03 6E 3F 29 46 50 61 72 F7
^^ ^^-this is the last packet, no more data to read
||
32 bytes of data
The <seq#> is a sequence number that the sender has to increment with each message sent. It allows to put the answers
in the correct order. It is possible to always send the same sequence number. The MF simply echo back in its answer the sequence
number it receives.
The number 0x20 right after the <seq#> is probably the number of data bytes included in the message.
Four components:
- MSB : high byte
- LSB : low byte
- msb : high bit of LSB
- sign bit
These values define the following bits:
MSB 01111111 00000000
LSB 01111111
msb 10000000
sign 10000000 00000000
Formula for positive values (sign=0):
raw_value = (MSB << 8) + (msb << 7) + LSB
Formula for negative values (sign=1):
raw_value = (~((MSB << 8) + (msb << 7) + LSB) & 0x7fff) + 1
<< is shift-left operation. << 8 is same as * 256. << 7 is same as * 128.
~ is inverse operation. ~0110 is 1001.
& is masking operation. 1011 & 0111 is 0011
We do & 0x7fff because we work with 15 bits values, not 16.
The raw value is mapped to 0.0 to 100.0 with:
display_value = raw_value * 100 / 32768
If sign=1 we must have a negative, then do:
display_value = -display_value
To round the value to one decimal, use:
display_value = Math.round(raw_value * 1000 / 32768) / 10;
MIDI implementation chart: https://www.arturia.com/faq/microfreak/microfreak-general-questions
10 Basic Waves
21 SuperWaves
32 WaveTable
42 Harmo
53 KarplusStr
64 V.Analg
74 WaveShaper
85 Two Op. FM
95 Formant
106 Chords
117 Speech
127 Modal
0 Off
127 On