In case anyone is interested, here is Bandmix's answer to my question about this:
The issue with the "chimpmonk" or "slow" effect is due to the way that the mp3 was originally encoded. Adobe Flash can handle most standard mp3 encodings with any bitrate. However, some mp3 encoders use "non-standard" encoding techniques that Adobe Flash can not handle... Namely the MP3-PRO encoding scheme.
When a file is encoded with the MP3-PRO setting the file seems to play too fast and makes the audio sound as if it were made by chipmonks. The solutions is to re-encode your mp3's with a standard MP3 codecs. BandMix will support CBR and VBR encoding -- at any bitrate.
I recommend using dbPowerAmp to encode MP3 files. It's a small, "right-mouse-click" type utility that makes encoding an MP3 a snap. Usig the standard settings in dbPowerAmp works great with BandMix.
Or you can download the free version of Switch Sound File Conversion Software Audio File Converter. http://www.nch.com.au/switch/index.html ... WAodhjNtaw
After you have installed the software onto your computer, open any music file in Switch. Then select 'File'. Then select 'Save File As' and lastly save the file as 'MPEG-Layer 3 (*mp3)'.
I'm going to give this a try...
Cheers!
-gronkbass