[directmusic] Re: Mp3 encoded wav tracks...

  • From: "Jason Booth" <jason@xxxxxxxxxxxxxxxx>
  • To: <directmusic@xxxxxxxxxxxxx>
  • Date: Wed, 18 Dec 2002 11:32:46 -0500

Hmm. I thought that's what the offset was for - does this handle the
offset for you automatically?

-----Original Message-----
From: Scott Morgan [mailto:scott@xxxxxxxxxxxxxxxxx]=20
Sent: Wednesday, December 18, 2002 7:38 AM
To: directmusic@xxxxxxxxxxxxx
Subject: [directmusic] Re: Mp3 encoded wav tracks...

Have you played with the new 'set decrompressed start' feature in DMP?
That should fix it for you.  It's on the right click menu in the wave
editor if memory serves.

-Scott Morgan

----- Original Message -----
From: "Jason Booth" <jason@xxxxxxxxxxxxxxxx>
To: <directmusic@xxxxxxxxxxxxx>
Sent: Wednesday, December 18, 2002 9:08 AM
Subject: [directmusic] Mp3 encoded wav tracks...

> Ok - So I'm playing with the compression in Direct X 9 RC2's version=20
> of Direct Music producer, and I've come across some annoying problems=20
> that I can't seem to figure out for the life of me. The project uses a

> series of 16 bar wav tracks with variations, with smaller loops played

> as secondary segments over top of them. The problems I'm having are as

> follows:
> - After run-time saving the files with "MP3 128kb" compression, a=20
> small gap is placed 1 second into the file
> - This can be viewed in Soundforge, and always appears
> in the same place.
> - The MP3 format adds a small amount of space to the beginning of the=20
> file, which has several problems I should be able to use the offset to

> account for this gap, however, I don't know what the offset should be.

> To figure it out, I thought I could load both the original and encoded

> files into soundforge, and examine the difference in length to find=20
> the offset. However, both files load in having the exact same sample=20
> count; yet I can clearly see a space in the front of the mp3 encoded=20
> version when comparing them, and the end does not appear to be=20
> clipped. This has me really baffled..
> - This time difference between the files causes my project to
> slowly loose sync over time.
> Anyway, if anyone has experience using a lot of MP3 encoded wav=20
> tracks, or knows what offset I should set, and why my files appear to=20
> be exactly the same, yet drift in time, I'd appreciate the help..

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