@mijostyn wrote:
There is no such thing as a "lossless" digital volume control. Some units may revert to an analog volume control. But, even the best digital volume controls lose bits as the volume goes down. It is just that the really fast processors do not lose enough bits to affect sound quality.
You're right, there isn't, but I explained what I meant by the "lossless" part in parenthesis, while forgetting the quotation marks. Whether or not the volume control of my DAC/preamp sports a 64-bit floating point (I don't know its specs in this regard, other than it's digital through and through), I can't say, but it trumps the 64-bit floating point VC of my JRiver MC31 playback software (with DAC volume at what equates to 0dB), and that's all I need to know. And bear in mind: my speaker system is ~100 to 111dB sensitive, actively configured, so oftentimes I'm using the lower range of the volume control, which only tests its resolving capabilities here.
Down the road? I have been tuning my system one Hz at a time for 25 years. Let's say I measure my system and see a 3 dB dip in the left channel at a specific frequency say 358 Hz. I can select 358 Hz and increase it 3 dB. I can also adjust the Q of the filter matching what I see on the measurement exactly.
That's what I'm doing already and have for a few years now, but what I've learned from measurements and the corresponding, manual frequency corrections is that a frequency peak of, say, 5dB's shouldn't be suppressed with -5dB's, but rather less. Indeed, less is more here, and it's surprising how smaller corrections can have an effect - indeed the proper effect. We measured a peak over my EV horns at just over 13kHz with the left and right horn peak measuring exactly the same down to the single Hertz, and applied a mild suppression here (i.e.: less than the peak indicated) for the best sonic outcome. Decibel increments with the Xilica DSP are adjusted at 0,25dB's, although 0,10 would've been nice. Delay in 0.010ms increments. Single Hz ditto.