spell-music / csound-expression

Haskell Framework for Electronic Music
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(how to repair) error: -+rtmidi='virtual': unknown module #50

Closed jwaldmann closed 5 years ago

jwaldmann commented 5 years ago

The example from the tutorial

vdac $ midi $ onMsg $ \x -> saw (x + 150 * leg 2 2 0.5 1)

lead to this error

error: -+rtmidi='virtual': unknown module
 *** error opening MIDI in device: -1 (Unknown MIDI error)

I needed some time before I realized that this is because of a missing csound module. I fixed it by installing csound-virtual-keyboard (on Fedora).