Hi Mark, On 6/12/07, Mark Rivera <marr@xxxxxxxx> wrote: > I designed and built a MIDI sequencer based around a Microchip PIC18 > MCU, and used the built-in hardware timers and interrupt levels to drive > the 'scheduler' for initiating MIDI output (EUSART) routines. In this > same vein, I would like to write a software sequencer with as 'tight' > timing as possible. Man, join linux-audio-dev list, you'll be our god :) > So, in a similar concept for Linux - from where does > the timing of audio and MIDI events come from? > It occurred to me that it would be nice to have a loadable kernel module > (LKM) to which userland programs could subscribe for receiving 'soft > interrupts' based on some timer (cpu ticks?) so that various software It think you should look into hpet/rtc devices. You also may be interested in jack and especially midi-over-jack (which I, in fact, maintain). It is an audio-sample-syncronous midi transport. You may look into my jackmidi-driver for details about event timing. I even hope you can help to make better :) And I'm also very interested in writing a good sequencer. Regards, Dmitry. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
