On Tue, 2006-09-26 at 10:51 +0200, Ismael Valladolid Torres wrote: > I assumed that the same sound output was being forwarded to both the > analog output and the optical output as S/PDIF, but I might be wrong. you are almost certainly wrong. reflecting the design of most chipsets, ALSA tends to represent analog and digital I/O's as distinct PCM devices.