I believe when you switch on the chorus switch, the left and right outputs are 180 degrees out of phase.... there is no dry channel on one side... the effect is like a parked leslie
... the delay time is modled to be consistant with a leslie cavity... so lets see...
speed of sound approx (1,125 feet per second so 1 millisecond is around 13.5 inches..... a leslie horn rotation is a little closer to 16 inch diameter so I would assume there would be an initial"dry delay" at 1.2ms (this is the one that makes the brightness drop) and a second set of delays to account for the side cabinetry (mine is 28' by 18') so first reflection (left)would be 14 inches or 1 ms and second (right)would be 28" + 14" or 42 inches... 3.0 ms... combined, d1 1.2ms/ d2 2.2ms/ d3 4.2ms)... these delays would be in both channels but out of phase... once you turn the chorus on slow horn, these delays are modified to simulate the choral effect....i believe by d2 slowing to 4.2ms and D3 speeding up to 2.2ms every rotation while d1 remains constant at 1.2 ms for that hollow sound...
-----Original Message-----
From: Max Fazio <>
To:
yamahacs80@yahoogroups.comDate: 07/09/2010 15:50
Subject: [yamahacs80] Chorus request
Hi all
Is anybody able to record a simple switch ON/OFF of the chorus effect without switching on either chorus or tremolo? I'm looking at how the structure of the circuit is made: from what I could understand at the simple ON the sound seems made as LEFT= dry signal, RIGHT= wet signal; I believe I'm wrong, can anybody confirm that or explain?
Also, according to my calculations, the basic delay at ON should be a little less than 6ms am I wrong?
Thx for any reply
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