We have been unable to find documentation on this issue on Macromedia's web site. This issue is not a fault of our software, but rather an issue with the Flash plugin. The only solution i can offer at the moment is to re-encode your mp3's with a standard mp3 encoder. Our software will support the playback of most any standard encoding and any bitrate, just be sure that you don't use mp3PRO encoding.
There are many MP3 encoders, each has different sample rates, so we cannot confirm for sure if the one you are using will work properly with Macromedia's flash. This will depend on the conversion software/ MP3 format you are using or converting.
You may have to play with different conversion programs/formats in order for it to work properly. We don't have a definative answer of what format to convert to, because each originating format is different, and each will convert differently.
Typically, you'll need to convert your MP3 file to:
BIT RATE: 32
SAMPLE RATE: 22050
I would recommend using this free conversion app and convert your mp3 to the proper sample rate.
GOT CHIPMONKS? dbPowerAmp is a free Windows tool. Once you install it, you'll be able to right-click on an .MP3 or WAV file and select 'Convert' . You can then adjust the sample and bit rate of MP3 and WAV files. Convert from one format to another, just about every audio type is supported: mp3, mp4, Windows Media Audio (wma), Ogg Vorbis, AAC, Monkeys Audio, FLAC and many others
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Alternate solutions for this issue are to:
1. re-Record your message using the MWT software
2. Use a third party conversion tool to resample your mp3 files. Check
google for available options
iTunes file Fix:
You may fix the problem by going into iTunes prefs, choosing 'custom' for the MP3 encoding, and then choosing 44.1kHz for the sample rate instead of 'auto'. Apparently when iTunes uses an auto bit rate, the Flash player is unable to adjust its playing speeds to accomodate the optimized MP3 file."
Lame encoded files:
Flash plays chipmunk on a LAME encode at 40kbps mono, but works fine at 32 kbps.