The PDF I downloaded is ~1100 pages and it's the second revision of an originally crowd-funded project
I've only briefly skimmed it but it certainly seems very comprehensive & way more than I'm ever likely to need. :D
But just now I've just noticed that they describe (on https://openmusictheory.github.io/about.html) their use of the textbook for "...“inverted” or “flipped” courses, often following an inquiry-based model" and the "..text is meant to take a back seat to student music making (and breaking)".
Which matches what's motivated me to learn more about the theory side: it was after playing around & creating tracks (using the FLOSS LMMS / Carla / Surge XT music creation software) that I hit a point where I wanted to learn how to make my music have more of a melodic component to it.
And it turned out, for me, at least, creating rather than playing/reproducing music is way more motivating for me to learn the theory which I kinda wish someone had shown me during the short period multiple decades ago when my parents were paying for piano lessons until it was suggested that if I wasn't going to practice perhaps it wasn't the best investment... :)
* Interactive version: https://openmusictheory.github.io (v1) or https://viva.pressbooks.pub/openmusictheory/front-matter/int... (v2)
* Non-interactive downloads (e.g. PDF, EPUB): https://viva.pressbooks.pub/openmusictheory/ (via http://www.openmusictheory.com/) (v2)
The PDF I downloaded is ~1100 pages and it's the second revision of an originally crowd-funded project
I've only briefly skimmed it but it certainly seems very comprehensive & way more than I'm ever likely to need. :D
But just now I've just noticed that they describe (on https://openmusictheory.github.io/about.html) their use of the textbook for "...“inverted” or “flipped” courses, often following an inquiry-based model" and the "..text is meant to take a back seat to student music making (and breaking)".
Which matches what's motivated me to learn more about the theory side: it was after playing around & creating tracks (using the FLOSS LMMS / Carla / Surge XT music creation software) that I hit a point where I wanted to learn how to make my music have more of a melodic component to it.
And it turned out, for me, at least, creating rather than playing/reproducing music is way more motivating for me to learn the theory which I kinda wish someone had shown me during the short period multiple decades ago when my parents were paying for piano lessons until it was suggested that if I wasn't going to practice perhaps it wasn't the best investment... :)
But, you know, better late than never, I guess!
Edit:
* Added direct link to v2 interactive version.
* Re: your specific question re: pitch & tone, this seems like a reasonable starting point: https://viva.pressbooks.pub/openmusictheory/chapter/aspn/ though it also refers back to an earlier chapter: https://viva.pressbooks.pub/openmusictheory/chapter/clefs/