Initialize Sound-program (Sound Init)

1. Press the [Shift button] and hold it.
2. Press the [Store button] three times and release.
3. Release the [Shift button].
4. Turn the [alpha dial] until 'Init Sound: A??' appears.
5. Press the [OK button] ([Parameter/Value button]) to execute.

Source: Microwave — microwaveperformancemanual.raw (manual)