Re: upsampling and sinc-filter

"[email protected]" <[email protected]> writes:

> Hi all,
>
> I want to make 3 changes to a wav-file: 1. bit depth, 2. upsampling and
> 3. sinc-filter - at one time. For the upsampling I assume -L and for the
> filter I assume -L. Does Sox calculate this several times in a row? Is
> this the correct and most effective command?
>
> sox 16bit_44_1.wav -b 32 -e float output.wav rate -v -L 88200 sinc -a 80
> -L -21000 -t 2100

What is the purpose of the lowpass filter here?

-- 
Måns Rullgård