Also [2] is a decent book for overall dsp concepts.
[1] DAFX - Digital Audio Effects (Second Edition) Edited by Udo Zölzer https://dafx.de/DAFX_Book_Page_2nd_edition/index.html
[2] Understanding Digital Signal Processing, Richard Lyons
consider maybe backing it up with one of the textbooks like oppenheim (the classic) or manolakis (one that i think i remember liking).
Also [2] is a decent book for overall dsp concepts.
[1] DAFX - Digital Audio Effects (Second Edition) Edited by Udo Zölzer https://dafx.de/DAFX_Book_Page_2nd_edition/index.html
[2] Understanding Digital Signal Processing, Richard Lyons