> -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Andy Walls > Sent: Monday, November 30, 2009 7:03 PM > To: Discussion list for development of the IVTV driver > Subject: Re: [ivtv-devel] PVR150 Tinny/fuzzy audio w/ patch? > > Wow. Just bizarre. One that you found it; two that we're > actually chaning IO pins to be disabled and float on the > CX25843 when setting up a capture. > > The above function calls to VIDIOC_STREAMON/OFF are actually > now calls to > linux/drivers/media/video/cx25840/cx25840-core.c:cx25840_s_stream() > in the latest version of the driver. This function disables > or enables > (mostly) audio, audio clock, and video clock related pins on > the CX25843. These pins likely feed into the CX23416 MPEG > encoder chip. > > I suspect that these signals floating cause the CX23416 to > make some bad guesses about audio sample rate when > CX2341X_ENC_INTIALIZE_INPUT is called. The only note I have > about INITIALIZE_INPUT is that it is for video input initialization. > > I don't know the history here, but on the surface your patch > looks plausible that it would solve the problem. I just > don't know about the applicability to other CX2584x/CX23416 > boards other then the PVR-150; the patch might apply to them too. > > Regards, > Andy >
I have both a PVR-150 and a PVR-350. Both seem to exhibit the tinny audio behaviour. If this patch can be made to work for both cards, I'd be willing to try it out. I'm currently running 2.6.30 but am going to be upgrading to 2.6.31 soon. I normally have to run a script that sets the audio-in on both cards to line-in (or something, I forget) to get them to reset the audio. I usually do this about every 10 seconds but have since backed that off. I never got the timing right to do it after a Myth channel change like I wanted to. _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
