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

[Ulrich K. <ul...@ch...>]

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.

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.

Ulrich