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Topic: Audacity skips, (while recording)< Next Oldest | Next Newest >
buzzard Offline





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Posted: Mar. 12 2007,03:44 QUOTE

I loaded DSL on an 850MHz computer with the intention of using it to record music tracks using the "Audacity" application.

The problem is:
While recording, Audacity stops listening for about 0.1 second every 45 seconds or so, causing gaps in the recording.  That would be fine for talk, but I am trying to record music.  I tried disabling the meter bar, the scroll, anything that would hog cpu time.  I even tried lowering the sample rate and the bits.

The glitch seems to occur whenever it writes data to the harddrive.  I looked in proc, and it shows HD on irq14, audio on 17.

I can record audio on a 233MHz win98 machine, so CPU speed shouldn't be the problem....??  DMA conflict?  Crappy audio hardware?

I can supply DMESG if needed (fairly large file).
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^thehatsrule^ Offline





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Posted: Mar. 12 2007,05:09 QUOTE

If it's related to the hd...
is dma enabled on it?
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mikshaw Offline





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Posted: Mar. 12 2007,14:09 QUOTE

Do you have a temp directory specified in preferences?

Any difference between recording in stereo and mono?


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ron Offline





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Posted: Mar. 12 2007,14:22 QUOTE

Buzzard, it's a problem with Audacity not Linux. It's quite heavy on system resources, and can introduce latency artifacts depending on how much memory is available to the buffer. You have 2 choices: either change the Audacity preferences so that the buffer size is increased, or use another app to record the audio (you can use Audacity to process it afterward). The latter option is more likely to work. Audacity can cause these problems with Windows as well. The reason it might not do so could be that the version you're running on your Windows machine is much older. :0

Something else you might try: use ALSA drivers instead of OSS, and see what happens.
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buzzard Offline





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Posted: Mar. 13 2007,02:33 QUOTE

Quote (mikshaw @ Mar. 12 2007,09:09)
Do you have a temp directory specified in preferences?

Any difference between recording in stereo and mono?

Yes, I have /mnt/hda1/aud/ for my temp dir.

When recording in stereo, it will record, but skips.
When recording in mono, it records at half the specified sample rate. (not sure if it skips in mono, i only rec. a few seconds in mono)
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5 replies since Mar. 12 2007,03:44 < Next Oldest | Next Newest >

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