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Problems with Audacity 1.2.3. during playback recording

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(@kalle_in_sweden)
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Joined: 19 years ago
Posts: 779
Topic starter  

Hi
I have a problems with playback recording using Audacity.
When I record a new guitar solo track during playback from a background track, the two tracks will not be in sync during playback ( as suspected).
But, even if I adjust the track sync in the beginning of the tracks, with the time shift tool, the tracks will go out of sync after approximatly 1 minute of playback.
It sounds as the track no 2 is running a little bit faster then track no 1 .

I have made other playback recording with the Creative Media Source player SW ( included with my Creative Soundblaster Live! 24-bit card) No such sync problems there.

Any tips on how solve these sync problems ?
The background track is an imported MP3 track.
Could it be a computer or soundcard problem ?
Or is it a setup problem in Audacity that I don´t know of?

Tanglewood TW28STE (Shadow P7 EQ) acoustic
Yamaha RGX 320FZ electric guitar/Egnater Tweaker 15 amp.
Yamaha RBX 270 bass/Laney DB 150 amp.
http://www.soundclick.com/kalleinsweden


   
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 Nils
(@nils)
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I don't think it is a setup problem in Audacity and I also don't think it is necessarily a soundcard problem. I have never ran into this problem but have heard of it happening but I don't remember what the cause was other than something to do with MME soundcard timings. I went over to the Audacity forum and didn't find anything there either.

When you play the mp3 before importing it I assume it is in time, correct?

And if you play it back after importing it without recording another track at the same time is it still in time?

In the interim version 1.2.4 is available for download. Since it has a fair amount of "bug fixes" it may be worthwhile getting the update and see if that helps.

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 Mike
(@mike)
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Nils posted the new Audacity 1.2.4 & Beta 1.3 download.

I'm with Nils, see if that helps and please get back to us.

Mike


   
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(@hueseph)
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Joined: 21 years ago
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If you made a change in samplerate between recording the first track and recording the second track, that would account for one of the tracks sounding slow. It would also account for the tracks being out of sync. Check your audio pool to see what samplerate the tracks are recorded at.

https://soundcloud.com/hue-nery/hue-audio-sampler


   
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(@kalle_in_sweden)
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The imported background track is http://www.bluesguitar.ru/jam/Blues/Moore/GMoore_StillGotTheBlues.mp3 with a bitstream of 128kbit/s (according windows mediaplayer)
And Audacity is recording with sampling frequency 44100 Hz and sampling format 32-bit.

Is this compatible data ?

Tanglewood TW28STE (Shadow P7 EQ) acoustic
Yamaha RGX 320FZ electric guitar/Egnater Tweaker 15 amp.
Yamaha RBX 270 bass/Laney DB 150 amp.
http://www.soundclick.com/kalleinsweden


   
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 Nils
(@nils)
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Looks OK. If you look at the track control block on left after you import it you can see that it is 44,100 and 32 bit float also.

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(@kalle_in_sweden)
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It must be someting with my PC or soundcard.
Exactly the same thing happened when I tried Kristal.
I converted (with audacity) the backing track to a wave file and imported it in to Kristal.
When I then recorded , the recorded track no 2 is running a little bit faster then track no 1.
The initial lag between the two tracks is large !

The PC is 1.8 GHz and has 512 MB RAM and running under XP.
The Sound card is a low cost Creative Soundblaster Live! 24-bit

Tanglewood TW28STE (Shadow P7 EQ) acoustic
Yamaha RGX 320FZ electric guitar/Egnater Tweaker 15 amp.
Yamaha RBX 270 bass/Laney DB 150 amp.
http://www.soundclick.com/kalleinsweden


   
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 Nils
(@nils)
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OK, everything I find at the KAE site points to "latency". They point to a writeup and suggestions on curing the problem. See if any of this helps with the problem.

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 Mike
(@mike)
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Which comes back to what Hue said...............
If you made a change in samplerate between recording the first track and recording the second track, that would account for one of the tracks sounding slow. It would also account for the tracks being out of sync. Check your audio pool to see what samplerate the tracks are recorded at.


   
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(@smokindog)
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Joined: 20 years ago
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It must be someting with my PC or soundcard.
Exactly the same thing happened when I tried Kristal.
I converted (with audacity) the backing track to a wave file and imported it in to Kristal.
When I then recorded , the recorded track no 2 is running a little bit faster then track no 1.
The initial lag between the two tracks is large !

The PC is 1.8 GHz and has 512 MB RAM and running under XP.
The Sound card is a low cost Creative Soundblaster Live! 24-bit

I think the soundblaster live is only 16 bit :wink: I have used that card and a 1.1GHz with 258 RAM with good results.

My Youtube Page
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(@kalle_in_sweden)
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Topic starter  

I found a solution to my problem using Audacity!
Instead of using the Soundblaster sound card, I tested to use the integrated soundcard parts of the Nvidia mainboard.
And it works !
Latency between backing track no 1 and recorded track no 2 is nearly non existant and I can´t hear any speed difference efter more than 2 minutes of plavback.

And the Nividia card has a separate line-input wich fits the line output of the V-amp better.

The Soundblaster card has only a combinated Mic/Line input wich has always made me suspicious. How the analog pre-amp of that input can handle signal levels from low 5 mV (low signal mic) to 200 mV ( line levels) without being distorted ( high levels)or noisy (low levels) is more than I understand.

Tanglewood TW28STE (Shadow P7 EQ) acoustic
Yamaha RGX 320FZ electric guitar/Egnater Tweaker 15 amp.
Yamaha RBX 270 bass/Laney DB 150 amp.
http://www.soundclick.com/kalleinsweden


   
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(@kalle_in_sweden)
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Topic starter  

After installing the ASIO4ALL driver I can now use my Soundblaster Live! 24-bit card in Kristal without any latency problem.
One reason why the intregrated NVidia soundcard (16-bit input) works with low latency in Audacity could be that Nvidia has included NvASIO drivers in the driver package.
Haven´t yet tested the Soundblaster card in Audacity after installing ASIO4ALL drivers, but in Kristal I can now use the ASIO4ALL or the NvASIO driver with the NVidia card with good results and the ASIO4ALL driver with the Soundblaster card.

I can´t use the KX Project driver on the Soundblaster Live! 24-bit card as it is not based on the EMU10kX chipset (according KX project FAQ.

Thanks Nils for pointing me to the ASIO4ALL driver.

Tanglewood TW28STE (Shadow P7 EQ) acoustic
Yamaha RGX 320FZ electric guitar/Egnater Tweaker 15 amp.
Yamaha RBX 270 bass/Laney DB 150 amp.
http://www.soundclick.com/kalleinsweden


   
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 Nils
(@nils)
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Thanks Nils for pointing me to the ASIO4ALL driver.
Your welcome. It does not always help but worth a shot in my book.

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(@kachman)
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Joined: 19 years ago
Posts: 155
 

So you had to change your sound card to solve the problem?! Not good.... I seem to be having a similar poblem - even in Audacity 1.2.4. I recorded all my tracks in audacitiy - and everything looks aligned and in time, but when I go to playback or record, the tracks get all jumbled up after maybe 30s to 1 minute. I've got 5 or 6 tracks and they all just seem to switch pace and start to do their own thing! I haven't been recording long and haven't dealt with so many tracks in one file so I thought that might be the problem.

Just to check, I saved it anyway and exported as Vorbis .ogg file and then imported and played on another software, and the timing was fine! So yeah, figured it was either a soundcard-to-audacity problem or memory....

http://www.myspace.com/kachman


   
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 Nils
(@nils)
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Sounds like another latency problem. Try the link I entered above to cure latency problems.

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