A deliberate practice app for guitar players who want to level up

Cool! I guess there needs to be a way for people to share new lessons to practise, it gets complicated with copyright pretty fast.

For real "lessons" you'd probably need to start at chord progressions, go into scales and how the chords relate back to those, then move to these types of soloing technique lessons.

AlphaTab is the star here https://github.com/CoderLine/alphaTab - it's been maintained tirelessly for years by Daniel Kuschny.

I've started to build this type of lessons sitea few times in the past and never really got it together enough to release anything. I've done scale/chord/arpeggio tools: https://github.com/webprofusion/scalex

What do you need "scales" practice for on guitar? It's a totally relative instrument except when playing on empty strings, so there's only one "scale" pattern that you have to learn. It's nothing like a keyboard!

There are dozens of scales to learn, with roots all over the fretboard. Each useful for different things. Just the basic minor pentatonic requires five different patterns. Eight note scales require eight different patterns, with various roots depending on the mode you want to play.

The Guitar Grimoirr scale book is 200 pages!

By "pattern" you mean starting the scale on a different note/step? (or, equivalently, rolling the interval arrangement and ending up with one that's seemingly "different"?) That seems like a trivial change - if you can play C-D-E-F etc. you can play D-E-F etc. Why does it have to be "learned" separately?

No, there are different scales. For a start, you can play a minor scale instead of a major one, or you can play a chromatic one (all the notes, a semitone at a time). Sticking to the notes of a scale when playing a melody is playing in a particular mode, for instance the pentatonic scale is a blues mode. Several modes are from ancient Greece and create strange stiff-sounding moods. I can't claim great consciousness of the mode/scale used in any familiar songs (other than the pentatonic), but this is a thing and it goes on a lot. Popular in the technical end of thrash metal.

Edit: the minor scale doesn't count because C major = A minor if you start on A, fair enough, forget that one.

> the minor scale doesn't count because C major = A minor if you start on A, fair enough, forget that one.

It might actually count since the harmonic minor exists. But this is just stressing the point that all of those "separate" scales might perhaps be best introduced as simple variations of the usual diatonic scale. Then sure, you might want to practice them a little bit, but at least you should have "learned" them in that you are not wondering what you're supposed to play.

Even though they don't all have seven notes? (Why is a seven-note scale called "diatonic" anyway, that should mean a scale of two notes, doesn't sound very exciting.)

> Why is a seven-note scale called "diatonic" anyway

The prefix of "diatonic" is "dia" ("through"), not "di" ("two"), but nobody really knows what exactly its origin (διάτονος, "diátonos") was supposed to mean[1]: it's probably either something like "through the tones" or "stretched out tones".

The second meaning is closer to the modern definition we have for diatonic: the 7 (out of 12) notes are selected to be as stretched out as possible in the octave, that is, each adjacent note is either 1 or 2 semitones apart, and the two 1-semitone-apart pairs are as far as possible from each other (note that the second requirement excludes e.g. the ascending melodic minor[2] from being considered diatonic, even though it has 7 notes).

[1] https://en.wiktionary.org/wiki/diatonic

[2] https://en.wikipedia.org/wiki/Jazz_minor_scale

Wikt doesn't give any other word where dia- means "stretched out". It's usually "across". I guess a stretched-out thing is stretched across a space.