Subject: Re: [linux-audio-dev] beat slicer under linux
From: Juhana Sadeharju (kouhia_AT_nic.funet.fi)
Date: Sat Oct 06 2001 - 10:59:19 EEST
>selected sample. During this analysis, all of the beat transients in the
>sample are located by performing a frequency-domain analysis of the
>signal. The patented Beat Munging algorithm looks at the energy in
>various frequency bands and locates the times where the energy rises
>sharply, identifying them as transients.
The patent and previous publications should be looked at detail because
analysing audio that way has been done for years. Sure, they have(?)
a patent for their variant but they may have no right to beat analysis
by these methods.
The intent could be to scare people away from using spectral analysis
in beat finding, and make us to waste time in reading previous
publications. Does the patent even list references to research on
beat estimation? Many patents don't list research other than other
patents: they are trying to mislead us that there are no free
research done in the field.
If the beat is the same for the whole song, then one could check
peaks at very low frequencies; the bass drum or the bass guitar.
Just do it.
Regards,
Juhana
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