I can agree. If I use my Analog Rytm MKI with the Octatrack MKI Power Supply ( PSU-2 Rev. B 6V 3.0A ) then I exactly get this Test Error: Audio [-] LR12345678. If I use then instead the Analog Rytm MKI Power Supply ( PSU-3 12V 2.5A ) then the Sound / Audio works as expected. Seems the Voltage from the Octatrack PSU is to low. Maybe it’s also not a good Idea to change it the other way around. I understand if Users think that a Elektron PSU is a PSU for all Devices from Elektron but it seems we need to take Care here !