Atari ST stereo mod on YM2149 chip

This video shows how to create a stereo mod for the Atari ST by tapping audio signals on the Yamaha YM2149 chip. Link to Atari ST stereo mod schematics: https://rdemming.home.xs4all.nl/Atari/StereoST/ Music: Chiptunes from the Atari SNDH archives