darrenyeats;543041 Wrote: > Hi mswlogo, > If I look at the original link > (http://mysite.verizon.net/forumwebspace/RightMark/Test%20Reports/Volume.htm) > I can't see where 75db is mentioned (except 75.8db, under volume 20 or > what they call "50%"). > > The point is that at 80 volume on Squeezebox you're dropping about 10db > or less than 2 bits. > > Where do you get 14 bits from? The original 16 have descended less than > 2 bits - they're sitting comfortably in the middle of the 20 bits a good > DAC can resolve. > Darren
Correct in that example Volume 20 has has 75.8dB of dynamic range. They also note that "Volume 20" is "50%". I believe translating that, that would mean 50% of the 0-96dB scale. Or in other words 48dB of attenuation. 8bits of attenuation. For the "Volume 30" case. They list that as "75%". Which is the closest value to your example of "80". You you will get close to the performance of "Volume 30". At volume 30 you get approx 88dB dynamic range. 2-bits lost at 75% volume. If you want to extrapolate you'd lose something like 1.8bits at 80%. My assuming 0 to 40 on the old squeezebox maps roughly to 0 to 96dB or 0 to 100 on newer SQueezeBoxes means I'm assuming a very agressive log scale in that test. If that old scale is any less agressive (meaning they are attenuating even less for the same amount of dynamic range loss) they numbers come out much worse. -- mswlogo XP > Cat5 > Transporter/DuetController > SPDIF > Meridian G68 > DSP6000, DSP5500HC, DSP5000 XP > Cat5 > SB3 > SPDIF > Meridian DSP5000 XP > Cat5 > DuetReceiver > SPDIF > Meridian G91 > DSP5000 'My Transporter Setup' (http://forums.slimdevices.com/showpost.php?p=350741&postcount=45) 'Hitch Hikers Guide to Meridian' (http://www.meridianunplugged.com) ------------------------------------------------------------------------ mswlogo's Profile: http://forums.slimdevices.com/member.php?userid=9090 View this thread: http://forums.slimdevices.com/showthread.php?t=77725 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
