My new YouTube playlist: "Music production" has a mix of super insightful videos, and a few sort of interesting,music-related videos. I'm adding videos there as I go.

Good channels:

Filter vs. equaliser:

https://www.audiomasterclass.com/newsletter/what-is-the-difference-between-eq-and-filters-with-audio

Note: we can use a filter to help extract a particular part of a track for sampling, e.g., a low-pass filter, removing most of the vocals, to extract the bass line from a song that has just voice + bass.

You can apply a LFO (low frequency oscillator) to other effects. for example: