Rack units at the back: 4U

Equalizers:

the filter’s effective gain is adjusted dynamically according to the program material

They are loved and used for that to this day

Street Erhu Beltdrive Rack units at the back:About The Street Erhu is a truly unique live performance phrase library featuring over 4600 high quality traditional Chinese Erhu violin phrases. The Erhu is a traditional 2 string violin dating back more than a thousand years, likely originating from Mongolia. The instrument has a small hollow snake or goat skinned cylindrical resonating body and a long thin neck with no fingerboard. It is played upright in the performer's lap, with the bow passed