[Evinyatar]

My idea was to use a PowerBook 540 as a esound server, so I can have my G4 decoding MP3/OGG/AAC/... and send the PCM data to the PowerBook 540. Then adding a cool interface, maybe touchscreen and an infrared remote control it'd be the perfect music center, as the PB540 is fanless and 100% silent when the HD is spun down.
However one problem arises; the esound server part. I was originally planning on installing m68k linux on the PowerBook, but alas the ethernet interface isn't supported according to the status page. So I was thinking of writing an esound server, using Open Transport and the Sound Manager. However I have no experience with either of these so I was wondering if anyone could help me out? Details on the esound protocol can be found here.

[Evinyatar]

So I started writing my EsounD server (starting off using RB, converting to C later), but I'm having problems with SndPlayDoubleBuffer not calling my doubleback procedure. I don't know what's going wrong at all. The source for the sound bit can be found here.

What I'm doing to test it is; open a PCM data file, read all of it into the circular buffer which is initialized at a big enough size, then call startPlaying. All of the functions return noErr, and the circular buffer works for sure (it's been extensively tested).
Monitoring the backproccalls variable indicates that the ASoundDoubleBackProc callback isn't being called at all.

Anyone have any ideas of what might be wrong here?