Adjust audio and visual settings on iPod touch
You can adjust audio and visual settings such as mono audio, audio balance, and LED Flash for Alerts.
Adjust the volume balance and mono audio
Go to Settings > Accessibility > Audio/Visual.
Adjust any of the following:
Mono Audio: Combine the left and right channels into a mono signal played on both channels.
Balance: Drag the Left Right Stereo Balance slider.
Flash the LED for alerts
If you can’t hear the sounds that announce incoming calls and other alerts, iPod touch can flash its LED (next to the camera lens on the back of iPod touch). The LED flashes only if iPod touch is locked.
Tip: LED Flash for Alerts is a useful feature for anyone who might miss the tones associated with calls and other alerts in a noisy environment.
Go to Settings > Accessibility > Audio/Visual, then turn on LED Flash for Alerts.
To prevent LED flashes when iPod touch is in silent mode, turn off Flash on Silent.