Bluetooth and Voice Command
MikeCal over on the Windows Mobile Team Blog has a short summary of why Voice Command doesn't work on Bluetooth. Briefly, the reason is that when the speech group built the original Voice Command SR models, we built them for the higher-quality 16KHz audio of the built-in device microphone, but BT is fundamentally built around 8 KHz.
Note that this means Bluetooth will actually work for many people, especially males with deeper voices that travel well in 8 KHz. A high-pitched voice (like females or children) need the extra high frequencies of 16 KHz and won't sound good on BT. This also explains why you have a harder time distinguishing children's voices when you talk over a regular phone line (which is also 8KHz).
The good news is that making 8KHz models is no more difficult than 16KHz. In fact we build them all the time for Speech Server. There's no reason we can't do that for Voice Command too, and in fact... well let me just stop right there.
