Volca Keys
Available solder points
MIDI Out
CV Out = VCO/VCA/VCF
Oscillator control = Both waveforms for each oscillator (1,2,3) - Apparently these should be the same as for the Bass.
The above image is from https://iamcomputo.wordpress.com/2014/01/02/korg-volca-hack-points-and-videos/
Information on what CC's the knobs output can be seen here: http://www.marcushamblett.co.uk/tag/volca/
USA_volcakeys_MIDI_Chart_E.pdfKORG volca keys MIDI Implementation Revision 0.01 (2013.06.23)
1.TRANSMITTED DATA
No message is transmitted.
(The volca keys is not equipped with a MIDI Out jack.)
2.RECOGNIZED RECEIVE DATA
2-1 CHANNEL MESSAGES [H]:Hex, [D]:Decimal
+--------+---------+-------------+-----------------------------------------+
| Status | Second | Third | Description |
| [Hex] | [H] [D] | [H] [D] | |
+--------+---------+-------------+-----------------------------------------+
| 8n | kk (kk) | vv (vv) | Note Off vv=0~127 *1|
| 9n | kk (kk) | 00 (00) | Note Off *1|
| 9n | kk (kk) | vv (vv) | Note On vv=1~127 *1|
| Bn | 05 (05) | vv (vv) | PORTAMENTO *1|
| Bn | 0B (11) | vv (vv) | EXPRESSION *1|
| Bn | 28 (40) | vv (vv) | VOICE *1*2|
| Bn | 29 (41) | vv (vv) | OCTAVE *1*3|
| Bn | 2A (42) | vv (vv) | DETUNE *1|
| Bn | 2B (43) | vv (vv) | VCO EG INT *1|
| Bn | 2C (44) | vv (vv) | CUTOFF *1|
| Bn | 2D (45) | vv (vv) | VCF EG INT *1|
| Bn | 2E (46) | vv (vv) | LFO RATE *1|
| Bn | 2F (47) | vv (vv) | LFO PITCH INT *1|
| Bn | 30 (48) | vv (vv) | LFO CUTOFF INT *1|
| Bn | 31 (49) | vv (vv) | EG ATTACK *1|
| Bn | 32 (50) | vv (vv) | EG DECAY/RELEASE *1|
| Bn | 33 (51) | vv (vv) | EG SUSTAIN *1|
| Bn | 34 (52) | vv (vv) | DELAY TIME *1|
| Bn | 35 (53) | vv (vv) | DELAY FEEDBACK *1|
| En | bb (bb) | bb (bb) | Pitch Bender Change |
+--------+---------+-------------+-----------------------------------------+
n : MIDI Channel = 0 ~ F
vv : Value
*1 : This message is recognized when the "MIDI RX Short Message" is set to "On".
*2 : VOICE
[H] [D] [H] [D]
00 (00) ~ 0C (12) : POLY
0D (13) ~ 25 (37) : UNISON
26 (38) ~ 3E (62) : OCTAVE
3F (63) ~ 57 (87) : FIFTH
58 (88) ~ 70 (112) : UNISON RING
71 (113)~ 7F (127) : POLY RING
*3 : OCTAVE
[H] [D] [H] [D]
00 (00) ~ 15 (21) : 32'
16 (22) ~ 2B (43) : 16'
2C (44) ~ 41 (65) : 8'
42 (66) ~ 57 (87) : 4'
58 (88) ~ 6D (109) : 2'
6E (110)~ 7F (127) : 1'
2-2.SYSTEM COMMON MESSAGES
+-----------+-----------+-----------+------------------------------+
| Status[H] | Second[B] | Third[B] | Description |
|-----------+-----------+-----------+------------------------------+
| F2 | 0xxx xxxx | 0xxx pppp | Song Position Pointer |
+-----------+-----------+-----------+------------------------------+
pppp : 0~15 = STEP 1 ~ STEP 16
x : ignored
2-3 SYSTEM REALTIME MESSAGES
+-----------+----------------------------------------------+
| Status[H] | Description |
+-----------+----------------------------------------------+
| F8 | Timing Clock *4|
| FA | Start *4|
| FB | Contiune *4|
| FC | Stop *4|
| FE | Active Sensing |
+-----------+----------------------------------------------+
*4 : This message is recognized when the "MIDI Clock Src" is set to "Auto".