Sennheiser Digital Audio Player MP3128 - Manual (Page 13)

A
djusting the Volume
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To adjust the Volume
Press the VOLUME buttons located on the front of the unit to adjust volume.
You can adjust volume from 0 to 20.
- To Adjust Volume Slowly : Momentarily Press and Release the front
panel buttons in the direction desired to adjust the volume 1 interval
at a time(0-20) until the desired volume is reached.
- To Adjust Volume Rapidly : Press and Hold the front panel buttons
in the direction desired until the desired volume is reached .