LMS Volume control

Hi there

I've purchased a RaspberryPi with the 7 inch Touch Display and am planning to install a DAC board, etc. to end up with a Squeezebox Touch replacement.

When I installed piCorePlayer on the RPi I was asked about output and I could see that ALSA defaults to + 3-4 dB (or something like that) and that I'd have to choose 96% to get 0 dB out, which I did.

Suddenly I realize there's at least 4 different ways to control the volume, and I'm wondering - in which way does the LMS control it? Is it a "bit-perfect" reduction, or is it scaling in percent (not digital-friendly) ... and is dithering used, or not? Does LMS also "boost" output 3-4 dB at 100% ??

Thanks for any response that can make me a bit wiser as to what's going on. Pointers to previous discussions is definitely OK (I did a search both here and with Google, without finding answers).

P.S. I purchased the ApplePi DAC + Volume-Clocker, and the volume part controls the volume in a "bit-perfect" way, which presumably means it of course reduces output bits when you turn down the volume, but there's no quantization noise, etc. I find that I can control volume in LMS, as well as in piCorePlayer with the ALSA mixer, and now with the digital Volume-Clocker + finally I can also use the (analog) volume control on my integrated amplifier.

Best regards,
Claus