For all those engineers who dabble in music [Magnetovore] has your back. Musicians simply must know their scales and he came up with a papercraft slide rule for major and minor scales. The system ...

Harmonic minor keys are used when writing chords. There is another version of the minor key known as the melodic minor. This is used when writing a melody. Each key signature has two possible keys.

You don't need to know many guitar scales to play guitar solos – but you do need to know this one. The minor pentatonic is good enough for players including Angus Young, Slash, Eric Clapton ...