...it appears to solve some problems, I just need to post about them first ;) Problem solved: the endian logic in d_osc.c which is initially correctly defined in the first few lines of code, was overridden by yet another logic to determine HIOFFSET and LOWOFFSET for endianness. Works now, SGI Irix 6.5 with Pd 0.40, analog stereo audio, ADAT, Midi (even selectable from the GUI menu).