I have a bit to finish in the second one, on progressions, and some more to finish the last one. If anyone who is good on theory wants to check them, add some missing bits, make suggestions or whatever I would be grateful for any input.
Music theory 1 - basics
Easy ways to learn scales and chords, and a trick to make it impossible to enter the wrong notes.

A minor (Am) scale and chord. Note that there are no sharps (black notes) between B and C, and between E and F.
This tutorial is for beginners who want to make music but don't know any theory, a quick way to get going. This is the first of 4 tutorials. Later I will explain why everything as it is, so you understand more, which means less need for parrot fashion memorising. You will be able to work things out for yourself from basic knowledge.
All the white notes form the scale A minor. This is our starting point for all the major and natural minor scales.
Note - in this tutorial 'minor scale' means the natural minor scale. Major scales tend to sound happy, and minor ones sound moody, but minor scales are frequently used in pop, rock and dance music.
A minor (Am) is the same notes as C major (C).
C major just emphasises the C note more. Each scale starts with a tonic (first note), A starts with A and C starts with C.
All major and minor scales are related like that, i.e. the relative major is three semitones up from the minor.
A semitone or half tone is just each horizontal line in the Note Editor or a key on your keyboard, a tone is two semitones.
Now, let's say you want to do a remix/tune in D major. How to remember what notes you can play?
Well the relative minor is going to be be 3 semitones down, i.e. B minor.
Here's the clever bit...
Draw notes on all the white note slots in a vertical column for where A minor is supposed to be. Now shift them up two semitones. Any scale can be transposed up or down. So by starting from B, you now know where every note should be for B minor, who's relative major is D major.
For the B minor scale go from B to B, and go from D to D for D major scale.
Now adjust your midi clip so these notes are just outside your loop. To do this, select all the notes and hit the left arrow cursor on your keypad. Now click the Fold button.
Now you have folded, any note you draw in is going to be right!
Obviously do more than one octave (12 semitones), and accentuate the D if using the D major scale rather than the B minor.

Note editor is folded with the Bm scale so now any note entered is part of that scale

D major scale, folded

D major, unfolded
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I have to go and watch telly now, the rest of the tut and the other 3 are on my site, and the pics are clickable there if you need that. I might post the rest later.