mswlogo;543050 Wrote: > 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". So 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%. > I think I see where you're coming from.
If you look at the tests volume 30 is 12.5db of attenuaton but the result is only 7.1db reduction in dynamic range from 40 (max). This is noticeably different to stepping from volume 30 to volume 20, a further 12.5db attenuation but which results in a more expected 11.7db reduction in dynamic range. Why is the initial drop off nowhere near 12.5db decibels? I'm not an engineer but I do know this test was performed on a Squeezebox which has an SNR of "over 100db". Perhaps someone can step in and explain why the initial drop off is less than 12.5db. Perhaps it is to do with the DAC noise being a further 4db or so lower than -96db (compared to a digital 0db signal)? I would like to see the same test but on a Transporter. This has a SNR of about 120db. Wouldn't the drop in dynamic range be less than with a Squeezebox? Darren -- darrenyeats http://www.amazon.co.uk/gp/richpub/listmania/byauthor/A3H57URKQB8AQO/ref=cm_pdp_content_listmania/203-7606506-5721503. (Inguz bass EQ'd) SB3 -> (pre bypassed) Krell KAV-300i -> PMC AB-1 (caps bass EQ'd) Desktop -> Genius Slab SW-flat2.1 700 Sennheiser HD 25-1 II ------------------------------------------------------------------------ darrenyeats's Profile: http://forums.slimdevices.com/member.php?userid=10799 View this thread: http://forums.slimdevices.com/showthread.php?t=77725 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
