HI
This is a question concerning the use and connexion a dac to a streamer and set up the hardware volume control.
My volumio is V3, My DAC SMSL M100 that is compliant with the hardware volume control.
When I connect the dac via the USB port I can set up in volumio the hardware volume control
When I connect the dac via Toslink, I cannot, only software volume control is proposed.
It that mean the hardware volume control only available if we connect the dac on usb ?
Did I miss something in the setting to allow the hardware volume control when connected via toslink ?
Help will be appreciated
Georges
This is a question concerning the use and connexion a dac to a streamer and set up the hardware volume control.
My volumio is V3, My DAC SMSL M100 that is compliant with the hardware volume control.
When I connect the dac via the USB port I can set up in volumio the hardware volume control
When I connect the dac via Toslink, I cannot, only software volume control is proposed.
It that mean the hardware volume control only available if we connect the dac on usb ?
Did I miss something in the setting to allow the hardware volume control when connected via toslink ?
Help will be appreciated
Georges
USB has means for both signalling and audio between the units. Toslink is strictly only audio signal. So, no control via Toslink.
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IMO your DAC uses digital volume control inside the DAC chip, at least there does not seem to be any analog volume control behind the DAC https://petestunersandamplifiers.co...ecoder_Black_-9_1024x1024@2x.jpg?v=1568796694
That means software and hardware volumes make no difference, both just change numeric values of samples before the oversampling filter in the DAC.
That means software and hardware volumes make no difference, both just change numeric values of samples before the oversampling filter in the DAC.
So If I well understood, software/hardware volume is the same! why it is suggested to select HW rather than SV when possible in the streamer?
I thought HW is managed by a chip like PGA2311 or ressitance network to "simulate" the potentiometer on the analogic signal, after the dac does the conversion.
I thought HW is managed by a chip like PGA2311 or ressitance network to "simulate" the potentiometer on the analogic signal, after the dac does the conversion.
That's possible, but very few DAC devices use it. It's MUCH easier -> cheaper to utilize the digital volume control which most DAC chips offer. Parameters of current 24bit DACs are comparable to analog PGAs, the newer DACs likely having less noise/distortion.