[ivtv-users] CX18 audio interference

[faginbagin]

Hi Andy,

>>> I have a patch for testing at:
>>>
>>> http://linuxtv.org/hg/~awalls/cx18-av-core/
>>> http://linuxtv.org/hg/~awalls/cx18-av-core/rev/9beb99150ab1
>>>
>>> Helen and ivtv-devel list readers,
>>>
>>> This patch needs some tests run:
>>>
>>> 1. Check that sound is better with the NTSC tuner
>>> 2. Check that S-Video and/or Composite in with NTSC didn't break
>>> 3. Check that switching back to the tuner, sound is still OK.
>>> 4. Check that PAL & SECAM still work on SVideo and/or Composite
>>> 5. Check that PAL and/or SECAM tuner sound is OK.
>>>
>>> I'll try and test what I can during the course of this week.  I have
>>> high confidence that nothing is working worse than before :), but I
>>> can't check OTA PAL or SECAM (Maybe someone with a Compro H900 can
>>> check?).
>>>
>>> Since this bug was inhereted from the cx25840 module, I'm wondering if
>>> this is the cause of the PVR-150 tinny audio.  If I can reproduce the
>>> tinny audio with my PVR-150MCE, I'll try to experiment with having the
>>> SIF gain controlled by the audio decoder (the correct thing todo) versus
>>> the video decoder (the wrong thing todo) of the CX2584x.  This change
>>> can, with some difficulty, be ported to the cx25840 module, if that
>>> fixes the tinny audio.
>>>
>>> Regards,
>>> Andy

>> I downloaded the cx18-av-core repo and tested 1-3. Sound was good on a 
>> couple of the previously bad channels, 29 & 41. Switching to input 1, 
>> sound was still good, switching back to input 0, sound was still good on 
>> channels 41 & 29.
> 
> Good.  I'm assuming your audio issues are resolved.

Yes, and sounds good on mythtv, too.

> I was able to run tests 1-3 with Composite as the alternate input (I
> need to dig up an S-Video cable), and test 4 with PAL as output by a
> PVR-350 into the HVR-1600's composite.  Things were all OK - so I don't
> think I broke anything.
> 
> Daniel provided positive feedback on the ivtv-devel list as well.  I'll
> probably ask this to get pulled to the main v4l-dvb repo soon.

Many thanks,
Helen