The reality is not that they improve, necessarily, but that by playing them regularly, they remain in good working order. The motor needs to run, the bearings need to revolve and the electronics need to warm up. Cleaning a Mellotron or Chamberlin regularly is also critical to their reliability and playability.
Frank
In a message dated 6/16/2010 10:04:03 A.M. Eastern Daylight Time, unobtainiumkeys@gmail.com writes:
And the more you play them, the better they work.