Some sample packs on Cymatics are on sale for $ 48 for 3 hours only (until 8/31)

To be exact, I think it will be until 9:1 AM on September XNUMXst in Japan time.
(Extended until 9:2 AM on 6/XNUMX Japan time)

Some sample packs are quite cheap at $ 3.

The Gems series is especially recommended because it is easy to use.