On Mon, 22 Dec 2008 18:43:51 +0100 Conrad Berhörster <conrad.berhoerster@xxxxxx> wrote: > does anybody know, how to obtain the spdif channels by ALSA on the gina3G. > the echomixer shows me, that there is comming data. But JACK only shows 2 > incoming channels, which are the analog channels. S/PDIF has two channels only. You can use 8 digital channels by switching to ADAT and starting jack as follows: jackd -v -d alsa -d plughw:0,1 -i8 -o8 I don't know why jackd sees only 2 channels if you don't specify -i and -o. I just tested this config by sending audio data to the last two channels and jackrec captures it. > The amixer output shows 130 output (why that much?) Actually, 140 (10 inputs * 14 outputs). They are the monitor mixer knobs (each input can be routed to any output with a different volume). They cannot be used by jack yet. > A look into the ALSA code shows me, that there is a DIGITAL Mode implemented, > and the professional_spdif function seems to set the SPDIF value on true. Digital mode can be either S/PDIF coaxial cable or S/PDIF optical or ADAT optical. The Gina3G supports S/PDIF with 2 channels at 32KHz to 96KHz and ADAT with 8 channels at max 48KHz. The professional_spdif switch changes something in the protocol, but I never had to change it. Unless you have some equipment that need a specific setting, you can just ignore it. -- Giuliano. ------------------------------------------------------------------------------ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
