[mythtv-users] Asus Pundit Audio Problems

Henk Poley hpoley at dds.nl
Sat Apr 10 18:54:51 EDT 2004


Op zaterdag 10 april 2004 22:15, schreef Dave Stocker:
> Been searching through the archives and seen mention of this same
> hardware but nothing has seemed to make a difference yet. I am using an
> Asus Pundit with an Asus TV FM card and have a couple problems with the
> onboard audio (SIS SI7012, chip reports as Realtek ALC650 rev 2).
>
> The audio out from the TV card is hooked into the motherboard's CD-in
> jack. I have muted the CD-IN under ALSA and set it to be CAPTUR. When
> watching live TV or a recording from live TV the audio is filled with
> static/interference. I can faintly hear the actual audio from the
> channel if I turn the volume way up on the receiver.Using xawtv and
> aplay /dev/dsp seems to work fine. Another topic said this problem can
> be caused if the soundcard is not full duplex. Searching for specs on
> this card, some say it is and some say it isn't. Does anyone know for
> sure?

Well, people have used the audio in (loopback cable outside the case?) to 
record sound with Pundit. I hear some complain about the quality (in the 
sense that a dedicated soundcard will be a bit better), but not that you 
can't hear anything. The onboard sound is full duplex.

I myself use the 'digital loopback' of my saa7134 based TV card, so I have no 
idea about the recording quality of my Pundit. YMMV...

> The second problem is that I can't seem to get the card to output in
> 5.1. I have the Optical SPDIF output hooked into a receiver and the
> receiver only seems to detect 2 channels no matter what options I set in
> myth or for the dvd player (tried both xine and mplayer). Could be some
> ALSA configuration options I am missing. I have never played with 5.1
> through a computer before.

MythTV per default uses OSS output (don't know about xine/mplayer). The OSS 
emulation layer of ALSA then doesn't output the audio to the SPDIF output 
(from what I've heard... I don't have an SPDIF receiver so can't try).

Try specifying that you want them to use ALSA output.

	Henk Poley <><


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