http://www.robotvoicegenerator.net/ People who suspect a robot voice generator box might need an entire pile of ICs are confused; the ISD2500 ChipCorder category of ICs in Winbond contains just about all of the crucial components in one IC to record and playback audio messages. Included on the IC is really a microphone preamp and convenient for a low-cost electret type mic, an output signal amplifier to drive a loudspeaker.more