On Fri, Jan 28, 2011 at 12:03 PM, Peter Nelson <peter@fuzzle.org> wrote:
> On Fri, 2011-01-28 at 12:28 +0100, Philipp Überbacher 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@lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
Received on Fri Jan 28 16:15:05 2011
This archive was generated by hypermail 2.1.8 : Fri Jan 28 2011 - 16:15:05 EET