Voice Memos lets you use iPod touch as a portable recording device.
Voice Memos uses the internal microphone in iPod touch 4th generation. To use Voice Memos on iPod touch 3rd generation, connect the Apple Earphones with Remote and Mic or a compatible accessory with a microphone. These include Apple-branded earbuds and authorized third-party accessories marked with the Apple “Made for iPod” logo.
You can adjust the recording level by moving the microphone closer to or further away from what you’re recording. For better recording quality, the loudest level on the level meter should be between –3 dB and 0 dB.

Record a voice memo:
Tap
to start recording. You can also press the center button on a compatible three-button headset with mic.
Tap
to pause or
to stop recording. You can also press the center button on a compatible three-button headset with mic to stop recording.
You can record in either mono or stereo depending upon the external microphone you use.
When you start a voice recording, iPod touch makes a short ringing sound.
To use other apps while recording your voice memo, you can lock iPod touch or press the Home
button.
Play a voice memo you just recorded: Tap
.