[ Ref. Bob Taylor in 140616 MMDigest ]

For my Duo-Art (Aeolian-Skinner Op. 947, 1936) the Echo is wired at
the jackbox to turn on the softest stop, in my case the Spitzflute
Celeste.  I believe it was wired that way when I got it, but I've
had the instrument for 45 years.

Alan Douglas