An ever-increasing number of mainstream synths are supporting microtonal tuning these days. On the hardware side, Korg’s Monologue includes a set of the most common tunings, as well as user-created scales. On the software side, synths ranging from Alchemy to Zebra provide access to custom scales.
While getting the hang of composing with microtonal tunings can be daunting, there’s a simple way to experiment with one of the more common flavors: Harmonic sequencing. Although the standard 12-tone equal temperament scale is essentially based on the harmonic series with caveats for each key, working directly on harmonic sequences offers a tonal purity that’s immediately enticing for some artists.