If you mess up with this configuration you can reset to default.
Here you can select your desired output option. Default is onboard DAC, if any. At the moment, Volumio supports only one Output at the time.
These are the global volume control settings. By default, Hardware Mixer is enabled. However, if you cannot set the Volume, switching to Software Volume Control will solve your issue, costing in decreased quality.
Here you can set Up or Downsampling. Set the desired bit-depth and resolution and the desired Resampling algorithm.
You are going to reset the configuration to the default original values. You will lose any modification.