[linux-audio-dev] Software Sequencer API?

Hans Fugal hans at fugal.net
Fri Sep 12 09:04:01 UTC 2003

The code to aseqview would also prove instructive if you go the ALSA

* Christian Henz [Fri, 12 Sep 2003 at 03:05 +0200]
> On Thu, Sep 11, 2003 at 12:56:06PM -0700, Sean Don wrote:
> > 
> > Hi,
> > 
> > I'd like to program a "player piano" under GNU/Linux for OSS/Lite. All it would
> > do is play MIDI files and light up a song's notes on a graphical keyboard.
> > 
> > Unfortunately, my old SB16 sound card does not have AWE support and its Yamaha
> > OPL3 FM synthesizer support sounds very inorganic. Hence, I'm looking for a way
> > to use a "software sequencer" (like Timidity.) I tried Fluidsynth, but it causes
> > midis to break up on my computer.
> > 
> > Here are my questions:
> > 
> > 1. Is is possible to have a previously written player for OSS (such as SDL Mixer
> > or Timidity) play a stream in the background, and I somehow "read into" what
> > notes are being played at every moment so I can light up the correct piano key?
> > Unfortunately, Timidity is stand-alone; that is, is has no developmental
> > libraries.
> > 
> Hmm, I don't know about OSS, but you really should consider using ALSA!
> A simple solution would be to use timidity or fluidsynth as standalone apps and write a simple ALSA-sequencer client(check out http://www.suse.de/~mana/alsa090_howto.html) that just reads incomming events and draws the piano keys accordingly. Then you (a)connect your sequencer's MIDI-out to timidity/fluidsynth AND your app. 
> cheers,
> Christian Henz

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