With the Voice Memos app go to the Home Screen and open another app.
To return to Voice Memos, tap the little orange icon at the top of the screen.
If Voice Memos is turned on in iCloud settings or preferences, your recording is saved in iCloud and appears automatically on all your devices where you’re signed in with the same Apple ID.
Recordings using the built-in microphone are mono, but you can record stereo using an external stereo microphone that works with the iPod touch headphones port or the Lightning connector. Look for accessories marked with the Apple “Made for iPod touch” or “Works with iPod touch” logo.