The Minor Scales module produces pitch voltages representing the notes in minor scales.

There are several different minor scales.

The natural minor scale is represented by the main column on the left. The natural minor scale is also known as the Aeolian modal scale.

The harmonic minor scale differs from the natural minor scale by using the major 7th rather than the minor 7th pitch.

The ascending melodic scale is like the harmonic minor scale except it also uses the major 6th rather than the minor 6th pitch. It is essentially a major scale but with a flattened 3rd.

The descending melodic minor scale is the same as the harmonic minor scale.

Natural, harmonic and ascending melodic scales compared

The small yellow numbers show the number of semitones difference in pitch between the outputs.

The KEY IN socket is used to control which of 12 keys the scale is based on. If no voltage is connected then the key defaults to C.

The KEY IN signal is a standard 1 V/Octave pitch signal. It is used to transpose the scale by simple addition so will handle octave offsets and non-standard tuning, but it’s also used to update the helpful yellow note value labels. So the module is expecting the KEY IN voltage to be relatively stable. From an efficiency point of view it’s therefore best if things like vibrato or glides are added after this module .

Individual pitch outputs can be used for transposition, to build chords or be used in generative music patches.

The commonest application is perhaps to connect an S-Poly chord signal output from one of the OUT sockets to Adroit modules that utilize scales.

Other scale modules.

Availability

The Minor Scales module is part of LSSP XL.