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Old 05-19-2010, 10:58 AM   #11 (permalink)
VEGANGELICA
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Default Latency problem during rendering song as MP3

Freebase! Arrgh! I have a new problem with my sound recording program.

In the past when I rendered a song (created 3 months ago with Sony Acid Music Studio 7.0) as an MP3, the MP3 sounded just like what I heard within the audio program: all the tracks were in sync.

But NOW when I render the same song (with minor changes) as an MP3, the new MP3 seems to sound okay for around 1 minute, and then, wtf? I start to hear that the tracks are playing out of sync with each other, some sounding faster than the others!

I first noticed this problem because I have duplicate vocal tracks (one of which has several sections removed to alter the dynamics)...and they *used* to sound like one vocal track in the old MP3 I created several months ago, but now the two identical vocal tracks sound like a duet in an MP3 I rendered today!

I went back to the audio program, thinking perhaps I hadn't deleted an old vocals track, and realized there was no such track. Instead, the playback of the tracks is all messed up even within the audio recording program (although it is hard to hear), but very obviously once the song is rendered as an MP3! (Whimper! Whimper!) This didn't use to happen (around 3 months ago) when I last listened to the song using Music Studio 7.0.

As a test today, I opened the audio recording file and duplicated a vocal track (to make an identical track), then played both back within the program and they sounded slightly out of sync. I think all the settings (for latency compensation, etc.) are the same as when I created the song 3 months ago, when the tracks all seemed to be in sync, but something must have gotten changed (by me). I just don't know what to do to get all the tracks in sync again! What would cause identical tracks within the same song to play out of sync? The problem may relate to this:

Separate but probably related issue: thinking I'd step up a little in my recording software, I ordered the next-up Sony Acid recording software, Acid Pro 7.0, around 2 months ago. Well, when I first tried playing a song using Acid Pro 7.0, (having converted the song from the older Acid Music Studio 7.0 into Acid Pro 7.0), the song played along fine for around 2 minutes, and then the sound cut out. So, I assumed I was taxing the memory of my computer, so I fiddled with some levels...buffer size or something...and managed to get the whole song to play in Acid Pro 7.0.

But now when I open and listen to the song using the old Acid Music Studio 7.0 (in which it was created), I get this problem with tracks being out of phase (described in the first half of this message). I tried setting buffer sizes and audio interface latency settings back to what I thought they were before, but no luck. The other thing I noticed today is that the Acid Music Studio 7.0 program seems touchy...click on a track to mute it, then unmute, and the program freezes, becoming "nonresponsive"...whereas several months ago the program *never* froze up.

I obviously don't know enough to know what I'm doing wrong...or not doing. I've temporarily given up on using Sony Acid Pro 7.0, because I thought I'd just try to finish the song in Music Studio 7.0, since that was where it was created, and the program is less complicated. Could opening an Acid Music Studio 7.0 file as an Acid Pro 7.0 file, changing buffer size there, and then later opening this new Acid Pro 7.0 file as an Acid Music Studio 7.0 file have resulted in the tracks not lining up like they did in the original Acid Music Studio 7.0 file?

Say, where did your old music recording thread go up in the Artists Corner? I searched the threads you created and it appears to be GONE! (Sob!)
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Last edited by VEGANGELICA; 05-19-2010 at 02:01 PM.
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