HI I use the M_Audio Audiophile on my master machine running Demundi using the spdiff into and out of my DDX. I lock the card to the Desk using envycontrol and found it fine for digital work. No clicks or noise cheers Bob PS I use RME for the multitrack machine and this is well suported in Linux. Jason White wrote: > To clarify my hardware question, I am looking for a fully alsa-supported > device supporting reliable digital input and output using s/pdif, aes/ebu or > adat (optical or coaxial). S/pdif is most likely what I'll be using. > Connectivity to laptop computers id desirable but not indispensable. > > The Core Sound Pdaudiocf (with a PCMCIA adapter) is reputedly good, but it > supports input only - no output. > > Another option would be one of the M-Audio cards/devices, provided that Alsa > supports the s/pdif interface. > > -- Bearmusic hearmymusic.co.uk <http:www.hearmymusic.co.uk>