If you like what Phil did, you should also consider using a Propeller Board of Education (BOE) which has the same microphone and input circuitry, just connected to I/O pins 20 & 21 instead of I/O pins 8 & 9.
Parallax's SayIt module (discontinued) used a VR Bot (aka EasyVR) on a PCB to make it easier to plug into a Basic Stamp. The VR Bot also works with the Propeller.
I've used the SayIt with a Propeller a little. It works fine.
If you choose to go the VR Bot route, I have a bridge program to let the PC talk to the VR Bot module through the Prop. The bridge program is trivial if you know how to use a serial object, but I'd be happy to share mine if you want.
You could also have the PC talk to the VR Bot module directly through a Prop Plug. IIRC the VR Bot uses 3.3V logic. You can actually program everything on the VR Bot from a Propeller, but it's easier to use the GUI program on a PC to enter custom words.
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http://forums.parallax.com/showthread.php?130825
I've used the SayIt with a Propeller a little. It works fine.
If you choose to go the VR Bot route, I have a bridge program to let the PC talk to the VR Bot module through the Prop. The bridge program is trivial if you know how to use a serial object, but I'd be happy to share mine if you want.
You could also have the PC talk to the VR Bot module directly through a Prop Plug. IIRC the VR Bot uses 3.3V logic. You can actually program everything on the VR Bot from a Propeller, but it's easier to use the GUI program on a PC to enter custom words.