Andy Walls <[email protected]> writes: > On Sat, 2009-05-02 at 16:52 -0400, faginbagin wrote: > >> Andy Walls wrote: > >> >>> The cx18 driver is currently setting the AGC for the SIF audio input >> >>> amplifier to set the SIF input amplifier gain based on video signal >> >>> level. This register change (which is tailored for an HVR-1600 set to >> >>> the analog tuner) sets the AGC for the SIF audio input amplifier to be >> >>> controlled by the audio signal level. >> >>> >> >>> Hopefully that will make things better. >> >> Yes, it seems to do the trick! >> > >> > Good! >> > >> > Now I have lots of confusing code borrowed from the cx25840 module to >> > straighten up. Ugh! Don't look for a patch worth testing until next >> > weekend. >> >> No problem. I've put that set register command in my /etc/rc.local so >> I've got a workaround that should survive a reboot. > > Helen, > > 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 >
this patch fixed my NTSC audio issues. thanks andy, > > 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 > > > > _______________________________________________ > ivtv-devel mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-devel _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
