diff options
Diffstat (limited to 'backends/midi.md')
| -rw-r--r-- | backends/midi.md | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/backends/midi.md b/backends/midi.md index d3d6e33..3ac011e 100644 --- a/backends/midi.md +++ b/backends/midi.md @@ -15,6 +15,7 @@ The MIDI backend provides read-write access to the MIDI protocol via virtual por |---------------|-----------------------|-----------------------|-----------------------| | `read` | `20:0` | none | MIDI device to connect for input | | `write` | `DeviceName` | none | MIDI device to connect for output | +| `epn-tx` | `short` | `full` | Configures whether to clear the active parameter number after transmitting an `nrpn` or `rpn` parameter | MIDI device names may either be `client:port` portnames or prefixes of MIDI device names. Run `aconnect -i` to list input ports and `aconnect -o` to list output ports. @@ -30,6 +31,8 @@ The MIDI backend supports mapping different MIDI events to MIDIMonster channels. * `pressure` - Note pressure/aftertouch messages * `aftertouch` - Channel-wide aftertouch messages * `pitch` - Channel pitchbend messages +* `rpn` - Registered parameter numbers (14bit extension) +* `nrpn` - Non-registered parameter numbers (14bit extension) A MIDIMonster channel is specified using the syntax `channel<channel>.<type><index>`. The shorthand `ch` may be used instead of the word `channel` (Note that `channel` here refers to the MIDI channel number). @@ -40,15 +43,22 @@ MIDI channels range from `0` to `15`. Each MIDI channel consists of 128 notes (n additionally each have a pressure control, 128 CC's (numbered likewise), a channel pressure control (also called 'channel aftertouch') and a pitch control which may all be mapped to individual MIDIMonster channels. +Every channel also provides `rpn` and `nrpn` controls, which are implemented on top of the MIDI protocol, using +the CC controls 101/100/99/98/38/6. Both control types have 14-bit IDs and 14-bit values. + Example mappings: ``` midi1.ch0.note9 > midi2.channel1.cc4 midi1.channel15.pressure1 > midi1.channel0.note0 midi1.ch1.aftertouch > midi2.ch2.cc0 midi1.ch0.pitch > midi2.ch1.pitch +midi1.ch0.nrpn900 > midi2.ch0.rpn1 ``` #### Known bugs / problems +Extended parameter numbers (`rpn` and `nrpn` control types) can currently only be transmitted, not properly +received as such. Support for this functionality is planned. + To access MIDI data, the user running MIDIMonster needs read & write access to the ALSA sequencer. This can usually be done by adding this user to the `audio` system group. |