New features: firmware (OS)
1) The volume of the internal sounds can now be adjusted independently from external sounds in the Pxx and Uxx modes.
This setting also works in the USr and PC modes but has to be set in the Pxx or Uxx mode.
When the Proteus is turned on, the volume setting for the internal sounds is set to its maximum value.
Usage
While a session is running,
press the middle and bottom buttons at the same time and hold. This will cause the internal volume to decrease then go off over approximately 5 seconds. It will hold at the off level for half a second then cycle back up to full volume.
This setting is retained as long as the unit is turned on. The overall loudness of the mixed internal and external sound is still affected by the volume control.
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