Alpha is a collection of various sounds for Synth1. It starts with Zero expansion that contains a miscellaneous set of presets. More expansions are planned and will be available in the future.
Currently available expansions
Zero: a misc set of sounds like gritty basses, evolving dark soundscapes, unstable pads, abstract textures and soundscapes, sequences, keys, and sound effects. This collection contains 128 presets and it’s free.