I have some music collection and I want to sort/filter them easily according to their cut-off frequency (real bitrate, usually in kHz. I used to use Spek for showing me this information, but Spek doesn't provide any possibility to use it in terminal or for multiple files operations. I've already found some ways, but all of them just list bit-rate in which audio file is saved in kbps, not the actual cut-off frequency in kHz, which I need. I want to find a simple solution to filter the whole collection using e.g bash, python, existing simple tool, etc. Do you know any solution?
Clarification: I'm not looking for bitrate or sampling rate, I'm looking for frequency cut-off!