Right now we are doing the volume in the CPU, for both s/pdif and DAC outputs. The DAC also has volume control capability but we're not using it at the moment.
Since the DAC is 24 bits, no resolution is lost (assuming 16-bit PCM source) except at the ultra-low volume levels.
If you have a preamp then it's really ideal - set the preamp to the max listening level you'd want to use, and then you can use the volume control in Squeezebox.
On Mar 28, 2005, at 1:02 PM, windguy2 wrote:
How is the analogue volume controlled?
Is it lossless using shunt resistors in a chip or is it done digitally therefore dropping bits?
The reason I ask is that I use a passive preamp driving a power amp - if it uses shunt resistors in the analogue domain then I would be able to use the remote to control the volume of my system without losing resolution at low volume.
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