Video Asylum

TVs, VCRs, DVD players, Home Theater systems and more.

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this may help

Posted by Joe Murphy Jr on November 19, 2009 at 17:02:40:
There are players which can alter the level of their analog outputs. These players change that level in the digital domain.

For DSP work, changes are done in the digital domain. The analog input would be converted to digital and then the processing would take place. This new signal should then be converted to analog for volume adjustment, but there may be processors out there which adjust the volume in the digital domain.

For an AVR, the better ones will be analog from the input to the output and will only convert to digital if you require processing of the signal (bass management, delay, etc). The lesser ones will convert all analog inputs to digital -- regardless of whether you want to do processing or not.