[mythtv-users] Digital Audio out with Via chipset
brian.boyle at toronto1.ca
Wed Apr 13 18:17:31 UTC 2005
After checking out the whiki digital howto site I figure that since you
can resample you should able to change the volume. Sadly the site is
sound blaster specific.
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of James Armstrong
Sent: Wednesday, April 13, 2005 11:41 AM
To: Discussion about mythtv
Subject: Re: [mythtv-users] Digital Audio out with Via chipset
>>> are not working on the digital out. It works fine using the analog
>>> using the myth volume up and down changes the level. But when I use
>>> digital I get the full volume and no way to control it.
>> I'm thought S/PDIF is always at maximum volume (or better: there is
>> volume). At least my EPIA is also always on fixed volume, and I use
>> amps volumeknob to change the level.
> since SPDIF sends the raw PCM stream, I'd guess the only way to adjust
> the volume would be to resample or scale the bits on the fly - sounds
> unlikely. I could easily be wrong :)
> I'm sending SPDIF to my amp - which has a remote control volume
I'm using SPDIF on the Soundblaster Audigy. Controlled by ALSA. Volume
control works for me. I don't have to mess with the amp. The driver
probably just changes the amplitude before converting it to a digital
stream out the SPDIF.
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