From which generation did iPod touch include a voice recorder?
Voice recorder iPod touch ?
"...The original iPod touch does not support voice recording. The iPod touch 2nd Gen and iPod touch 3rd Gen work with some external microphones including the Apple Earphones with Remote and Mic (provided standard with the 32 GB and 64 GB configurations of the iPod touch 3rd Gen). The iPod touch 4th Gen and iPod touch "4.5" Gen have both an integrated microphone which makes it easy to use as a voice recorder and it is compatible with the Apple Earphones with Remote and Mic as well (but ships with standard earbuds)..." -- from everymac.com ipod-faq link:
•How can I use my iPod as a voice recorder? Can I add a remote...
everymac.com/systems/apple/ipod/ipod-faq/ipod-voice-recorders-micro
And then voice memos arrived in later iOS, some devices support that feature.
Recording Voice Memos - help.apple.com
Other specifications are in their all specification section; also
check into additional info resources such as MacTracker, & etc.
Good luck & happy trails! 🙂