Desperate: Why are "gaps" added when exporting MP3? -Sound Forge - PC

Subject:Desperate: Why are "gaps" added when exporting MP3? Posted by: bouncingbones Date:4/2/2003 8:53:22 AM Hi everyone, I would really appreciate your help on this one, it's rattling my nerves and I can't find the cure myself: Every time I try to render the PERFECT LOOP from .wav format to MP3, SoundForge adds "silent gaps" at the beginning and end of the loop. The result is a nasty interruption of the loop when I use it in Flash (for example)! It's killing me! The same happens when I re-open the rendered MP3 (it seems that it doesn't matter at which bitrate I rendered it), crop the loop to exclude the gaps and save it again: THE SAME GAPS AGAIN!! :-( Please help me if you can, I'm going nuts over this... Cheers,BB
Subject:RE: Desperate: Why are Reply by: MJhig Date:4/2/2003 9:02:13 AM That's the nature of MP3 format. Save them as .wav. From what I understand once in Flash they will be compressed there. MJ
Subject:RE: Desperate: Why are Reply by: bouncingbones Date:4/2/2003 12:53:15 PM MJ: I know and Flash does a nice job with its own MP3 filters, BUT: Once you've reached a certain filesize for your flash movie, including loops >100kb is not an option-- I have no choice but to load them thru actionscript during runtime (which has a few nice side effects). That's why I need to find a solution for this. The interesting point is: As you pointed out, Flash is quite capable of rendering MP3s w/o the gaps, so why is SoundForge not??
Subject:RE: Desperate: Why are Reply by: MJhig Date:4/2/2003 6:10:01 PM I don't know what Flash does when compressing it's audio, I don't have Flash nor do I work with loops, I've seen this question asked many times over the years in this forum and Sonic's answer has been that MP3 adds this extra blank data not Soundforge. You can search the forum and you will see many posts concerning this. I did however just run an experiment. I created a 1 measure loop of one of my drum tracks in Soundforge, looping perfectly before saving. Saved it as an MP3 then reopened and sure enough extra time was added. Saved it as an MPEG Layer-3 then reopened and again extra time was added. Saved it as .wma version 8 and no extra space, looped correctly. Opened the original .wav in Cakewalk Home Studio and saved it a an MP3 and the space is added destroying the loop. So, it's not Soundforge since both apps. when compressing to MP3 add the space and if you can use *.wma 8 you can get the file size you're after. MJ
Subject:RE: Desperate: Why are Reply by: Spirit Date:4/4/2003 7:48:30 AM What's the problem with Flash and 100K files ? I typically convert wav files of more than 6Mb to Flash and come up with 600K to 1Mb audio files which stream, play and sync with no problem... I'm doing narration, not loops, so maybe what I'm saying is irrelevant, but file size is not a huge constraint here...

Subject:Desperate: Why are "gaps" added when exporting MP3?

Date:4/2/2003 8:53:22 AM

Hi everyone,

I would really appreciate your help on this one, it's rattling my nerves and I can't find the cure myself: Every time I try to render the PERFECT LOOP from .wav format to MP3, SoundForge adds "silent gaps" at the beginning and end of the loop. The result is a nasty interruption of the loop when I use it in Flash (for example)! It's killing me!
The same happens when I re-open the rendered MP3 (it seems that it doesn't matter at which bitrate I rendered it), crop the loop to exclude the gaps and save it again: THE SAME GAPS AGAIN!! :-(
Please help me if you can, I'm going nuts over this...

Cheers,BB

Subject:RE: Desperate: Why are

Reply by: MJhig

Date:4/2/2003 9:02:13 AM

That's the nature of MP3 format. Save them as .wav. From what I understand once in Flash they will be compressed there.

MJ

Subject:RE: Desperate: Why are

Reply by: bouncingbones

Date:4/2/2003 12:53:15 PM

MJ: I know and Flash does a nice job with its own MP3 filters, BUT: Once you've reached a certain filesize for your flash movie, including loops >100kb is not an option-- I have no choice but to load them thru actionscript during runtime (which has a few nice side effects). That's why I need to find a solution for this.

The interesting point is: As you pointed out, Flash is quite capable of rendering MP3s w/o the gaps, so why is SoundForge not??

Subject:RE: Desperate: Why are

Reply by: MJhig

Date:4/2/2003 6:10:01 PM

I don't know what Flash does when compressing it's audio, I don't have Flash nor do I work with loops, I've seen this question asked many times over the years in this forum and Sonic's answer has been that MP3 adds this extra blank data not Soundforge. You can search the forum and you will see many posts concerning this.

I did however just run an experiment. I created a 1 measure loop of one of my drum tracks in Soundforge, looping perfectly before saving.

Saved it as an MP3 then reopened and sure enough extra time was added.

Saved it as an MPEG Layer-3 then reopened and again extra time was added.

Saved it as *.wma version 8 and no extra space, looped correctly.

Opened the original *.wav in Cakewalk Home Studio and saved it a an MP3 and the space is added destroying the loop.

So, it's not Soundforge since both apps. when compressing to MP3 add the space and if you can use *.wma 8 you can get the file size you're after.

MJ

Subject:RE: Desperate: Why are

Reply by: Spirit

Date:4/4/2003 7:48:30 AM

What's the problem with Flash and 100K files ? I typically convert wav files of more than 6Mb to Flash and come up with 600K to 1Mb audio files which stream, play and sync with no problem... I'm doing narration, not loops, so maybe what I'm saying is irrelevant, but file size is not a huge constraint here...