Re: [SoX-users] mcompand: getting stats for each band

[Eric W. <nor...@yh...>]

Ulrich Klauer <ul...@ch...> wrote:
> Eric Wong <nor...@yh...>:
> 
> > Since SoX doesn't expose the Linkwitz-Riley crossover filters used by
> > mcompand as standalone effects
> 
> In principle, L-R is just two Butterworth filters in series, so you  
> can get the lower part by "lowpass 800 lowpass 800" and the higher one  
> by "highpass 800 highpass 800", for a crossover frequency of 800.

OK.

> However, I did a quick comparison between this and using mcompand to  
> split audio into several bands, and the results matched only for  
> *some* bands. I am not sure why that is.

If you figure it out, I'd be curious to know.  Unfortunately much of
this stuff is still over my head :x