On Wed, Jul 21, 2010 at 2:01 PM, <f...@kokkinizita.net> wrote: > On Wed, Jul 21, 2010 at 01:26:40PM -0400, Paul Davis wrote: > >> floating point -1.0 == minimum value of an integer sample == -inf dBFS >> floating point 1.0 == maximum value of an integer sample == 0dBFS > > ??? At least the first of these makes no sense at all, > and the second applies if the dB value indicates a digital > peak level. More accurately: 0dB digital peak corresponds > to a sample value of + or - 1.
yeah, i got the first one wrong. mea culpa. but i think you need to avoid using "dB" in this context, and be clear about using dBFS. restated: floating point value of -1.0 == minimum value of an integer sample floating point value of 1.0 == maximum value of an integer sample floating point value of 0.0 == -inf dBFS floating point value of +/- 1.0 == 0 dBFS > An audio signal represents pressure variation as a function of > time. Multiplying it by two will give 2 times the pressure, > and 4 times the power. The subjective result is another matter. i was trying to be precise enough to include nonlinearities in the analog path. perhaps unnecessary. _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
