I'm asking for a textbook, website or whatever that is filled with "musical interval equations" to solve and that can check me.
By "musical interval equations" I mean something like:
- You are given a note and an interval or amount of semitones. You need to sum or subtract them and write the resulting note. E.g. "D + 11 st. = *you write the resulting note(C#)*", "Bb - minor 6th = *you write the resulting note(D)*" and so on.
- You are given two intervals or two notes. You need to find their difference in semitones or intervals. E.g. "A# - F = *you write the resulting interval(major 3rd)*", "tritone - major 7th = *you write the resulting interval(perfect 4th)*".
- And so on...
Also, how useful is it to do such kind of exercise, will I be able to recognize intervals nearly without thinking in the same way that I add and subtract small numbers(like the ones up to 20). Is there the something like this but about chords or scales?