[mythtv-users] tinny high pitch audio in recordings

Joel Oliveira joel.oliveira at gmail.com
Thu Sep 15 19:22:12 UTC 2005


Hi everyone - 

I just got my first myth box setup (finally) using a year old dell dimension 
box and a pvr-150 ... thanks to Jared everything was pretty much a snap. A 
few things crept up here and there but nothing I couldn't figure out. 

One thing I've noticed since recording my shows, though, is that the mpeg2 
files, when played back on both the mythbox and my windows machine, have 
audio that sounds a bit off. There's a high pitched whine in the background 
of the audio as well as a tinny effect on voices. I figure this might have 
something to do with the audio processing of the PVR-150? Maybe the 
recording volume on that device is too high?

If that's the case, the only question I have is - what device would that be 
when I fire up alsamixer? 

output of lspci:
-----------------------------
00:00.0 Host bridge: Intel Corporation 915G/P/GV/GL/PL/910GL Processor to 
I/O Controller (rev 04)
00:01.0 PCI bridge: Intel Corporation 915G/P/GV/GL/PL/910GL PCI Express Root 
Port (rev 04)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
PCI Express Port 1 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 
Family) USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 
Family) USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 
Family) USB UHCI #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 
Family) USB UHCI #4 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 
Family) USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d3)
00:1e.2 Multimedia audio controller: Intel Corporation 82801FB/FBM/FR/FW/FRW 
(ICH6 Family) AC'97 Audio Controller (rev 03)
00:1f.0 ISA bridge: Intel Corporation 82801FB/FR (ICH6/ICH6R) LPC Interface 
Bridge (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA 
Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus 
Controller (rev 03)
01:00.0 VGA compatible controller: nVidia Corporation NV37GL [Quadro FX 
330/GeForce PCX 5300] (rev a2)
03:01.0 Multimedia video controller: Internext Compression Inc iTVC16 
(CX23416) MPEG-2 Encoder (rev 01)
03:08.0 Ethernet controller: Intel Corporation 82562ET/EZ/GT/GZ - PRO/100 VE 
(LOM) Ethernet Controller (rev 03)
-----------------------------

running MythTv version:
0.18.1-113.rhfc4.at <http://0.18.1-113.rhfc4.at>

Thoughts?

thanks a million!

- J
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