Subject: Re: [linux-audio-user] Green's Function in Audio --- Demo Song
From: Erik de Castro Lopo (erikd-lad_AT_mega-nerd.com)
Date: Sun Aug 15 2004 - 01:50:01 EEST
On Sat, 14 Aug 2004 12:28:36 -0700
davidrclark_AT_earthlink.net wrote:
> From your web page, it *appears* that you are using the sinc method
> developed by Julius Smith of Stanford.
Basically yes.
> Smith's method is very
> fast, but not as accurate as FFT/overlap with large windows. Without
> Kaiser windowing, it wouldn't have seen the light of day due to the
> truncation effects.
I do use a Kaiser but unlike JOS, I optimize the beta value for
a number of factors that the JOS paper seems to neglect.
> I need something that preserves the phase and
> other information as accurately as possible between the channels,
> not a small-windows approximation.
SRC preserves phase.
> I need a guarantee of accuracy,
> and I simply didn't have the time to fully investigate the sinc
> method with Kaiser and other windows.
I have been meaning (at least since I first released SRC) to
write up some documentation on how SRC is tested, but I've
been a little busy doing other things :-).
> That was probably a longer answer than you anticipated, but I hope
> I answered your question.
Yes, thanks very much.
Erik
-- +-----------------------------------------------------------+ Erik de Castro Lopo nospam_AT_mega-nerd.com (Yes it's valid) +-----------------------------------------------------------+ `If you want a vision of the future, it is a wireless broadband network feeding requests for foreign money-laundering assistance into a human temporal lobe, forever. With banner ads.' -- John M. Ford
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