[mythtv-users] Anyone using a Chaintech AV-710 Sound Card?

Bill Williamson bill at bbqninja.com
Thu Oct 25 04:39:17 UTC 2007

On 10/25/07, Ryan Pisani <mythtv at frouse3.homelinux.com> wrote:
> I bought a chaintech av-710 about 6 months ago, installed it, and got
> basic analog functionality from it after a 1/2 day of screwing with it.
> I recently upgraded my main backend/frontend to a new kernel and new ALSA,
> so I thought I'd take another stab at getting the optical (i'd take the 3
> pin surround if i had to) surround sound working.
> I can get 2 channel sound out of standard output and optical. However, on
> the optical side I cannot get PCM volume adjustments at all, it is one
> constant volume no matter what I try....
> My recordings are standard stereo, but I've seen other users with other
> cards doing a sound duplication to simulate 5.1 surround. I'd like this
> even for movies, but there is nothing I can seem to get working that will
> ouput to any other channels. speaker-test will also only output to 2
> channels, no matter what I've tried.
> Anyhow, I bought this card because it seemed to have good alsa and linux
> support, however, since owning it I've not found a single asound.conf that
> seems to produce what I'm after and no recent data posted scouring the
> web.
> Is there anyone out there using this card? If so, can you send me your
> asound.conf and asoundrc files?  Has anyone gotten or tried to get
> simulated surround sound?
> The card is like $20.00 at newegg, so it's a good buy with spdif out and
> both analog and optical 7.1 support if it indeed can be done with alsa.

You are confusing AC3/DTS passthrough with the ability to generate
realtime 5.1 or 7.1 sound.  There are only two sound cards on the
market that support DTSLive or DDLive (generating 5.1 digital sound),
and neither support linux.  The nforce2 onboard sound DOES support
this, but isn't available in soundcard form.  Speaker test through
digital out will NEVER do more than 2 channels.

To test that it's working use a DVD and be sure that AC3 and DTS
passthrough are enabled.

More information about the mythtv-users mailing list