There are other scales, such as the Dorian mode (1-2-b3-4-5-6-b7), but the minor pentatonic and natural minor are the ones we usually learn first. By contrast, the harmonic minor has a unique ...
The Hungarian Gypsy scale is the fourth mode of the double harmonic scale, and is a great choice over minor/major 7th chords.
Listen to this audio extract to hear C Major modulating to A Minor. You can follow along ... modal music dates from before the use of scales and keys. Modes are similar to tonal scales.