Re: upsampling and sinc-filter
Måns Rullgård <[email protected]>
| Newsgroups | gmane.comp.audio.sox |
|---|---|
| Message-ID | <[email protected]> |
[email protected] writes: >> Am 20.02.2021 um 14:01 schrieb: >>> >>>> 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? > > The answer is YES? :-) Huh? The resampling (rate effect) applies a low-pass filter at about 21 kHz already. What is the purpose another one (sinc effect)? -- Måns Rullgård