hi cfuttrup,
My advise is not the think about volume control to much... it hurts. :D cfuttrup wrote: > 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. Welcome to the club. > 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. This is only concerning the built-in audio. The RPi built-in audio card is called "ALSA". I think they did this to confuse people. By default there is a 4dB gain. We have been recently playing with the "card controls" to allow this to be set to exactly 0dB rather than 96% which I think is 0.25dB. > 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% ?? Scary when you start thinking about this! You can set LMS to output 100% and use your analogue volume control, this is what I used to do. In the end I found, convenience won out and I use LMS volume control even though it is probably not bit perfect. I don't think LMS boosts output. > 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. Have you got your ApplePi DAC working? AFAIK we haven't got ApplePi DAC on the drop-down yet. regards Greg ------------------------------------------------------------------------ Greg Erskine's Profile: http://forums.slimdevices.com/member.php?userid=7403 View this thread: http://forums.slimdevices.com/showthread.php?t=109866 _______________________________________________ Squeezecenter mailing list Squeezecenter@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/squeezecenter
