On Fri, Jan 28, 2011 at 12:03 PM, Peter Nelson <peter@xxxxxxxxxx> wrote: > On Fri, 2011-01-28 at 12:28 +0100, Philipp Ãberbacher wrote: > >> Interesting.. would you mind explaining how this can be? >> How can 11-11 yield 4.80518e-16? > > Because, rather than 11, log(2048)/log(2.0) is actually (to 40 d.p.) > > 7.6246189861593984035895533360399422488305 / > 0.6931471805599453094172321214581765680755 > > But doubles don't contain 40 d.p.; it is approximately 16. Thus some > rounding errors may occur... > .. I wonder if this bugfix should be added to some other projects? I think the same fft.h is used in one of the functions in audacity? Perhaps someone who is on LAD could cross-post this? James _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
