The quality of a PDA recording can be varied from "GSM 6.10" at 8MHz with Mono sound (2KB/s) to "PCM" at 44.1MHz with 16bit Stereo sound (172KB/s). Thus, you can store between 6 minutes and 9 hours with 64MB of memory.

As far as noisy environments, there's an option that allows you to decrease the grain in noisy environments. However, the playback will probably be as good as an incoming message from Pluto depending on the type/noise level of plant. Wink

John