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'[OT] Sound card puzzle'
I've noticed one of my sound cards is recording strangely
Any music recorded is ~10% slow when played back. For
example, if I set the recording time (using Goldwave, but
recorder is irrelevant) to 30 seconds, 44100Hz, the session
completes in 27-ish seconds. Save, reload, playback takes
30 seconds, but sound is slow
I've looked through all the settings I can find ; Control Panel,
Device (VIA AC'97 Audio (WAVE)). All appear to be OK and
apparently exactly as the same as the other PC right next to it,
which is recording correctly. Changed the Device to the only
other with the same resolution, Microsoft Sound Mapper, no
It's as though the sampling is being done at 110% of 44100Hz.
48000Hz ? Yet I can find nowhere to set or unset greater than
Any thoughts ?
If you aren't part of the solution, you're part of the precipitate
I know that some USB cards are forced to 48kHz only; maybe yours, even
though it's not USB, has a similar restriction? Might be worth it to check
the hardware documentation if you have it, or do some googling on the device
if you haven't already.
On 6/23/06, Jinx <clear.net.nz> wrote: joecolquitt
Look at TOOLS -> DEVICE CONTROLS -> SPEED
Maybe that control is off-center a bit.
On 23 Jun 2006 at 20:36, Jinx wrote:
> I've noticed one of my sound cards is recording strangely
> Any music recorded is ~10% slow when played back. For
> example, if I set the recording time (using Goldwave, but
> recorder is irrelevant) to 30 seconds, 44100Hz, the session
> completes in 27-ish seconds. Save, reload, playback takes
> 30 seconds, but sound is slow
Hector Martin [PIClist] n/a
Many integrated sound cards will play or record at 48khz only - software
is supposed to do the conversion. It seems as though software is
recording thinking it's 44100, but the sound chip is putting out 48khz.
I'd say attempt to reinstall or update drivers. I also have VIA
integrated sound, but I run linux. It does work better on 48khz under
linux, especially if you use the DXS mixing channels, and sometimes it
ONLY works at 48khz or only records at that, but it's a bit confusing
and driver dependent. Works fine for me with the software
auto-resampling+mixing setup for ALSA, both capture and playback, but I
have no idea how it works on windows.
Hector Martin (marcansoft.com) hector
Public Key: http://www.marcansoft.com/hector.asc
> I know that some USB cards are forced to 48kHz only; maybe
> yours, even though it's not USB, has a similar restriction?
It's a mobo sound system, and hasn't always been a "card behaving
badly". As it's my #2 PC, I hadn't noticed before. Possibly a driver
has come adrift. I tried recording with "Voice" (11025Hz) and "Radio"
(22050Hz) with similar results. A 30-seond session was over in about
8 and 15 seconds respectively, and playback music was slow (ie it
dropped pitch to fill the 30 seconds). So, no matter what I select, it
appears to be sampling at a constant 48kHz. Time to go digging in
the drivers I think
> Look at TOOLS -> DEVICE CONTROLS -> SPEED
> Maybe that control is off-center a bit.
Sitting firmly on 1.00. AFAIK that control is for playback.
I tried the Win98 Recorder, and that does the same thing,
so I'm sure it's a h/w thing
Until I resolve this, and I have to do any recording before
I get around to a fix, any speed correction needed can be
done by fitting to 91.875% of the recorded time with Time
Warp. Sound comes out OK, but a PITA though
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