🚀 go-pugleaf

In article <52105@dime.cs.umass.edu>, hgschulz@cs.umass.edu (Henning Schulzrinne) writes:
> We are trying to use the audio capabilities of the Personal DECstation
> for real-time audio. Unfortunately, XMedia proves to be somewhat
> unsuitable for the task, since (among other reasons) we can't seem to get
> real-time play/record buffer position information or get notified (after
> less than 500 ms) how much audio data is available. Any suggestions on
> using DECstation audio (with or WITHOUT XMedia) are very much
> appreciated. (For the curious: we are implementing a real-time
> multiparty audio conferencing facility.)
> ---
> Henning Schulzrinne  (hgschulz@cs.umass.edu)  [MIME mail welcome]
> Dept. of CS and Dept. of ECE; Univ. of Massachusetts at Amherst
> Amherst, MA 01003 - USA === phone: +1 (413) 545-3179 (EST); FAX: (413) 545-1249

I have a similar request. We are trying to port some audio software on the
Decstations, and are really dissatisfied with the overall philosophy of the
"audio server" approach. Hell, we wanted a simple analog/digital converter
that would enable us to input output voice, and we are delivered a "sound
processing system" that cannot work without being intertwined with X-Window
and MOTIF. The specs are not delivered with the hardware, and DEC suggest that
we have to go through studying the "DEC multimedia architecture" before even
trying to sing "Hello world" through the loudspeaker. We immediately concluded
that we wont buy any DEC machines anymore for multimedia applications, but are
still stuck with the one we already bought.

Does anybody have the spec of the hardware interfaces (/dev/lofi), or will we
have to reverse engineer them?

Christian Huitema