Hi - I'll answer your email in a bit, but in answer to this: yes, you need the same number of bits for playback and record.
If you record at 16 bits, but then play back at 8, basically what you're doing is playing back the high byte, then the low byte, and so on - so it'll be half-speed, and badly garbled :)
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Hi - I'll answer your email in a bit, but in answer to this: yes, you need the same number of bits for playback and record.
If you record at 16 bits, but then play back at 8, basically what you're doing is playing back the high byte, then the low byte, and so on - so it'll be half-speed, and badly garbled :)