[Discussion] Stems and 16khz Frequency usage

I'm rather new at Spleeter, about 10 songs split as of today. I read that it can also separate at 16khz. When I tried this to see the difference, ...-c audio.mp3 spleeter:4stems-16khz -o output
I got the following msg; error: spleeter: no embedded cfs(I think it was) 4stems-16khz found
Is this still functional or is there to know what would be the optimal freq to use? Sometimes I get 2 tracks or 3 split tracks but no sounds in either one. Is this a bug or perhaps just because it cannot split it for some reason?

Start by reproducing the reported `spleeter:4stems-16khz` command with the provided audio example and inspect which embedded configurations are available. Done means determining whether the 16 kHz configuration is functional and documenting the cause of silent 2- or 3-track outputs and how frequency selection affects results.

Written by the indexing model from the issue text.