MIDI CONVERSION TABLE

How does it work?

This guide helps you convert human-readable OSC messages into raw MIDI hex commands for triggering KLANG functions from external MIDI devices, such as mixing consoles. It focuses on Note On, Program Change, and Control Change messages, showing you how to enter values in hex format and how they map to corresponding OSC paths used in KLANG. All numbers in the OSC paths use decimal notation, while the MIDI commands must be entered in hexadecimal on the MIDI device.

KLANG’s OSC Style Notation

This is used in KLANG:app’s translator with numbers in decimal notation: 

• /midi/note/<channel>/<noteNumber> i <velocity>
• <channel> must be between 1 and 127
• <noteNumber> must be between 0 and 127

Corresponding Raw MIDI command to be entered in console in Hex notation:

• 0x89 + <channelInHex> 
• <noteNumberInHex>
• <velocityInHex>

KLANG’s OSC-style MIDI Notation	Raw MIDI Hex Message	Description
/midi/note/1/0 i 0	90 00 00
/midi/note/1/0 i 63	90 00 7F
/midi/note/1/0 i 127	90 00 7F	Note On: C−2, Channel 1, Velocity 127
/midi/note/1/1	90 01 7F	Note On: C♯−2, Channel 1
/midi/note/1/2	90 02 7F	Note On: D−2, Channel 1
…	…	…
/midi/note/1/127	90 7F 7F	Note On: G9, Channel 1
/midi/note/2/0	91 00 7F	Note On: C−2, Channel 2
…	…	…
/midi/note/2/127	91 7F 7F	Note On: G9, Channel 2
…	…	…
/midi/note/6/0	95 00 7F	Note On: C−2, Channel 6
/midi/note/6/1	95 01 7F	Note On: C♯−2, Channel 6
/midi/note/6/2	95 02 7F	Note On: D−2, Channel 6
/midi/note/6/3	95 03 7F	Note On: D♯−2, Channel 6
/midi/note/6/4	95 04 7F	Note On: E−2, Channel 6
/midi/note/6/5	95 05 7F	Note On: F−2, Channel 6
/midi/note/6/6	95 06 7F	Note On: F♯−2, Channel 6
/midi/note/6/7	95 07 7F	Note On: G−2, Channel 6
/midi/note/6/8	95 08 7F	Note On: G♯−2, Channel 6
/midi/note/6/9	95 09 7F	Note On: A−2, Channel 6
/midi/note/6/10	95 0A 7F	Note On: A♯−2, Channel 6
/midi/note/6/11	95 0B 7F	Note On: B−2, Channel 6
/midi/note/6/12	95 0C 7F	Note On: C−1, Channel 6
/midi/note/6/13	95 0D 7F	Note On: C♯−1, Channel 6
/midi/note/6/14	95 0E 7F	Note On: D−1, Channel 6
/midi/note/6/15	95 0F 7F	Note On: D♯−1, Channel 6
/midi/note/6/16	95 10 7F	Note On: E−1, Channel 6
/midi/note/6/17	95 11 7F	Note On: F−1, Channel 6

Example for OSCulator

In this example incoming MIDI messages to OSCulator (/midi/cc4/10 and/midi/cc16/10) are converted to /midi/note/

KLANG’s OSC style notation

/midi/cc/<channel>/<command> i <value>

Raw Hex Notation

0xB<channel> <command> <value>

Example

/midi/cc/12/0 i 3
Controller Bank Select: 3 Channel 12
0xBB 0x00 0x03

KLANG’s OSC style notation

/midi/pc/<channel>/<programNumber>

Raw Hex Notation

0xC<channel> <programNumberInHex>

Example

/midi/pc/12/100
Program change 100 Channel 12
0xCB 0x64

Use this table to convert from Decimal numbers 1–127 to the hexadecimal representation for MIDI commands:

Decimal	MIDI Hexadecimal	Decimal	MIDI Hexadecimal
0	00	64	40
1	01	65	41
2	02	66	42
3	03	67	43
4	04	68	44
5	05	69	45
6	06	70	46
7	07	71	47
8	08	72	48
9	09	73	49
10	0A	74	4A
11	0B	75	4B
12	0C	76	4C
13	0D	77	4D
14	0E	78	4E
15	0F	79	4F
16	10	80	50
17	11	81	51
18	12	82	52
19	13	83	53
20	14	84	54
21	15	85	55
22	16	86	56
23	17	87	57
24	18	88	58
25	19	89	59
26	1A	90	5A
27	1B	91	5B
28	1C	92	5C
29	1D	93	5D
30	1E	94	5E
31	1F	95	5F
32	20	96	60
33	21	97	61
34	22	98	62
35	23	99	63
36	24	100	64
37	25	101	65
38	26	102	66
39	27	103	67
40	28	104	68
41	29	105	69
42	2A	106	6A
43	2B	107	6B
44	2C	108	6C
45	2D	109	6D
46	2E	110	6E
47	2F	111	6F
48	30	112	70
49	31	113	71
50	32	114	72
51	33	115	73
52	34	116	74
53	35	117	75
54	36	118	76
55	37	119	77
56	38	120	78
57	39	121	79
58	3A	122	7A
59	3B	123	7B
60	3C	124	7C
61	3D	125	7D
62	3E	126	7E
63	3F	127	7F

There are various tools to send MIDI messages, also from the command line. As an example, we just use sendmidi. It can be installed via brew on a Mac.

brew install gbevin/tools/sendmidi

Once installed, you can send MIDI messages from Terminal.

Example

We will send to the MIDI device called MIDI Control 1 on MIDI channel 3 the CC command 32 with value 63 (all values in decimal notation).

KLANG’s OSC style notation: /midi/cc/<channel>/<command> i <value>, i.e. /midi/cc/3/32 i 63:

sendmidi dev "MIDI Control 1" ch 3 cc 32 63