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Subject: Re: [yamahacs80] Double trigger cure ?

From: rj krohn <r_j_d_2.phila@...>
Date: 2008-05-24

i have noticed that i only seem to get double triggers on black keys. i have cleaned the contacts on all the keys as well as i can. for me, it SEEMS to be related to the fact that the weight disbursement is different on the black keys, as they have less mass on the key side than white keys.

do you have a particular method of cleaning that worked wonders on this?



erikfromhere <moogsynthex@...> wrote: In my experience, double triggering occurs mostly when releasing a key.
I think releasing a key takes a bit more time than pressing a key
during normal playing. At a certain point, there's a moment the right
spring-leave stops touching it's upper contact spring and a fraction of
a key-movement later it touches it again. This can be caused by a dirty
contact-surface, or the contact surfaces have blind spots, one or both
of the right spring-contacts are a bit tordated etc.

Till now, I am able to reduce double triggering by cleaning the contact-
area and some very slight bending/tordating of the 2 right contact-
springs and checking their behavour while very slowely releasing the
key.

In my opinion, if not all keys cause double-triggering then it's not
needed to modify the electronic circuity, just cure the keys that are
causing problems.







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