If I understand this, on the Squeezebox2 the volume is controlled digitally, therefore dropping bits to lower the volume. Because the DAC is 24 bits, with 16 bit PCM data the loss of resolution would only come at low levels after 8 bits are dropped. Would this increase the noise floor since that is an advantage with the 24 bit DAC?




<x-tad-smaller>Sean Adams</x-tad-smaller><x-tad-smaller> </x-tad-smaller><x-tad-smaller>sadams at slimdevices.com wrote:</x-tad-smaller><x-tad-smaller>
</x-tad-smaller>

<x-tad-smaller>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:

></x-tad-smaller><x-tad-smaller> How is the analogue volume controlled?
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> Is it lossless using shunt resistors in a chip or is it done digitally
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> therefore dropping bits?
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller>
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> The reason I ask is that I use a passive preamp driving a power amp -
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> if it uses shunt resistors in the analogue domain then I would be able
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> to use the remote to control the volume of my system without losing
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> resolution at low volume.
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller>
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> _______________________________________________
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> Discuss mailing list
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<x-tad-smaller>></x-tad-smaller><x-tad-smaller> </x-tad-smaller>
<x-tad-smaller>Discuss at lists.slimdevices.com</x-tad-smaller><x-tad-smaller>
</x-tad-smaller>
<x-tad-smaller>></x-tad-smaller><x-tad-smaller> </x-tad-smaller><x-tad-smaller>
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