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Subject:MP3 Settings
Posted by: Love Buzz
Date:6/30/2008 7:28:50 AM

Hi all.

I recently installed SF 9.00 and have been using the 192/148 setting when I export to.mp3. Although it sounds fine on my iPod, my computer, and in my car (on an SD card), when I upload the song to my website, it drags.

I have always used the 192/144 setting, but thought with the 148 I would be getting a better sounding audio file. Is the 148 setting what is causing the 'drag'?

Thanks for your help.

Subject:RE: MP3 Settings
Reply by: rraud
Date:6/30/2008 8:28:26 AM

Define 'drag'?
Generally the popular rate for music is 128KB/s-stereo ( 64KB/s-mono)
Use a Constant Bit Rate (CBR) for streaming

Subject:RE: MP3 Settings
Reply by: Love Buzz
Date:6/30/2008 8:59:00 AM

I understand when you burn to a CD that the highest rate you will get is 128, but I use 160 or 192 for .mp3 because I put those on my iPod, SD cards, and internet. It's 44kHz and 48kHz ...sorry not 144 and 148.

What I mean by 'dragging' is slower than normal.

Message last edited on6/30/2008 9:13:11 AM byLove Buzz.
Subject:RE: MP3 Settings
Reply by: Chienworks
Date:6/30/2008 11:35:16 AM

Actually when you burn to a CD you get uncompressed with an effective bit rate of about 1378Kbps. Not sure where you're getting the idea that it's limited to 128.

Choosing 48KHz instead of 44KHz will give you a higher frequency range but actually lower quality sound. At 48KHz you have to compress 9% more data into the same number of bits. So, if you want to maintain the quality you had at 192/44KHz then you should raise the bitrate to at least 209Kbps to compensate.

What's probably happening in your case is that some of the playback devices aren't noticing that the file is 48KHz and they're playing it back at 44.1KHz, which is about 9% slower. From a human standpoint, especially when playing back highly compressed files, the difference between 44.1KHz and 48KHz probably won't be noticeable. Quite likely the headphones and speakers you're using aren't reproducing the higher frequencies anyway. So, if 48KHz is giving you problems, don't use it.

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