I have had brass for almost a year and a half..........It has never been solid.Always glitches and zippers.... even on my FX55..just try an ensemble with 3 or more voices...They have never really improved it since it was dumped on the public. I complained to mr Brun long ago .......I am willing to send mine back to Arturia for a discount on the new "Origin" equal in value to my brass purchase ....."I am Happy with my CS80v purchase though"