Add external MIDI device synchronization on pedalboard load#113
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sastraxi wants to merge 6 commits intoTreeFallSound:pistomp-v3from
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Add external MIDI device synchronization on pedalboard load#113sastraxi wants to merge 6 commits intoTreeFallSound:pistomp-v3from
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Apr 19, 2026
sastraxi
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Apr 19, 2026
Introduces ExternalMidiManager and ExternalMidiOut for sending MIDI messages to external devices (e.g. Source Audio C4, HX Stomp) on pedalboard load. Config is per-device with glob-based port auto-detection and per-pedalboard message override via config.yml. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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# Conflicts: # modalapi/modhandler.py # pistomp/hardware.py
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I wanted each pedalboard to be assigned to a specific Source Audio C4 preset: with this pedal you can load 128 of them and then switch 'em via MIDI CC. This "external MIDI sync" implementation extends the global and pedalboard-specific YAML config to allow sending messages to a specific expected MIDI device (via MIDI port name match) when a pedalboard is loaded.
When configured, the External MIDI manager automatically sends configured messages when a pedalboard is loaded. In line with the pre-existing code, pedalboard-specific configs overwrite the global config. In my case, I use the global config to send a bypass CC to my external MIDI device, and then override this in specific pedalboard configs to enable the pedal and set it to the correct preset for that board.
modalapi/external_midi.py:ExternalMidiOut,ExternalMidiManager,EXTERNAL_INSTANCE_ID(used by downsteam branches)auto_detect: ["*HX Stomp*"])<pedalboard>.pedalboard/config.ymlexternal_midi:section with documented format