[mythtv-users] Improve audio?

brad at bradandkim.net brad at bradandkim.net
Wed May 9 15:06:36 UTC 2007


> On 09/05/07, brad at bradandkim.net <brad at bradandkim.net> wrote:
>> I have been running mythtv successfully for a couple of years but now I
>> want to improve my audio if possible.  I currently run left/right rca
>> out
>> from the set top box into an adapter that changes it to single mini rca
>> and goes into the pvr 250's line in.  There are no audio connections
>> from
>> the pvr 250 to my sound card.  Sound card is an onboard SB Audigy LS
>> with
>> both optical and coax spdif out.  I use the coax spdif out to my
>> receiver.
>>  So my questions are as follows:
>>
>> Is there a better way to connect audio from my stb to the PC?  My stb
>> has
>> both coax and optical out for audio.  I have digital cable and it seems
>> like taking stereo rca into a single mini jack would lose a lot of audio
>> quality.
>
> Not if you want the PVR-250 to encode audio for you. It's limited to
> stereo, which is what you're already feeding it. This is how I have my
> PVR-150 connected to my cable box (Samsung, UK) and the audio quality
> seems fine. I've got my MythBox connected via TOSLINK and I get 5.1
> audio when playing back DVDs and 2.0 when playing back PVR-150
> recordings.
>
> If your digital cable box supports FireWire, you should look into
> using that for the best quality connection to your MythBox.
>
>> My receiver has lights for the number of speaker channels it detects on
>> the connection and it only shows 2 when there 5 possible.  What am I
>> missing in my connection?
>
> Nothing. You are only feeding 2ch stereo to your PVR card, and that's
> all the encoded MPEG-2 stream contains. Even though you're using
> S/PDIF to convey audio signals to your receiver, it's only carrying
> 2ch audio when sending material recorded via your PVR card, so that's
> all it is detecting.
>
> Nick
> --

OK, so 2 channel is the bset I can do from the cable box but I should see
better audio on DVD playback.  That makes sense.  Thanks Nick.

Brad
http://bradandkim.net



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