[mythtv-users] Digital Audio out with Via chipset
James Armstrong
james at thearmstrongs.org
Wed Apr 13 16:41:04 UTC 2005
>>> are not working on the digital out. It works fine using the analog IE:
>>> using the myth volume up and down changes the level. But when I use the
>>> 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 no
>> volume). At least my EPIA is also always on fixed volume, and I use my
>> 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 knob...
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.
- James
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