Quick copy/paste from Matrix;
According the datasheet of the TAS5806MD it supports configuring the chip of which the voltage is one of the parameters which defaults to a PVDD of 24volt. Mycroft is not uploading a firmware nor changing the default values.
Would it help if we change the TAS5806md firmware to work on a lower voltage? Say 6 volt? with the downside to not have the full scale of volume (which we never had because of a hard limit set to around 60% anyway in their scripts)
More info over at the driver side I am working on which is based on initial code released over at the Texas Instruments Knlowledge center.
Mycroft have not released any firmware image for the DAC to be pushed toward the chip and in their script only set the same cold preboot parameters.
They also hard limit the volume output to 60%.
Maybe we can change the setting to use a lower PVDD voltage (withdraw less?) and remove the hardcoded limit of 60% as that also will no longer be needed.