Maurizio Berti wrote: > I was playing with pyalsa and I realized an unexpected behavior with > pitchbend events. > The pitchbend range should be, by MIDI standard, between -8192 and +8191, > or 0-16384. Being a 3 byte event, it should ignore any subsequent byte > received. > > Using pyalsa I'm able to create events with values greater than 127 The ALSA sequencer does not use the MIDI byte format for its events. Sequencer events use a 32-bit field for controller values: http://www.alsa-project.org/alsa-doc/alsa-lib/structsnd__seq__ev__ctrl__t.html and the entire structure is delivered unchanged to the receiving sequencer client. Events get converted into actual MIDI bytes only when they end up at a real MIDI port. In that case, only the lowest 14 bits of the value are put into the two data bytes of the pitchbend event. Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
