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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 17 |
1 files changed, 13 insertions, 4 deletions
@@ -245,11 +245,19 @@ The MIDI backend supports multiple channel types * `note` - Note On/Off messages * `nrpn` - NRPNs (not yet implemented) -A channel is specified using `<type><channel>.<index>`. +A channel is specified using the syntax `channel<channel>.<type><index>`. The shorthand `ch` may be used instead +of `channel`. +The earlier syntax of `<type><channel>.<index>` is officially deprecated but still supported for compatability +reasons. This support may be removed at some future time. -Example mapping: +Channels range from `0` to `15`. Each channel consists of 128 notes (numbered `0` through `127`) and 128 CC's +(numbered likewise), a channel pressure control (also called 'channel aftertouch') and a pitch control. +Each Note also has an additional pressure value associated with it. + +Example mappings: ``` -midi1.cc0.9 > midi2.note1.4 +midi1.ch0.note9 > midi2.channel1.cc4 +midi1.channel15.cc1 > midi1.channel0.note0 ``` #### Known bugs / problems @@ -259,7 +267,8 @@ a configuration option at a later time. NRPNs are not yet fully implemented, though rudimentary support is in the codebase. -The channel specification syntax is currently a bit clunky. +To see which events your MIDI devices output, ALSA provides the `aseqdump` utility. You can +list all incoming events using `aseqdump -p <portname>`. ### The `evdev` backend |