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Random signal flow on snare input.

PostPosted: Tue Sep 18, 2012 1:37 pm
by jackiecorn
I have done quite a bit of tweaking on my snare and I am happy with it.
When all my pads are plugged in, I can actually set my threshold on the snare to 0 and now get the flowing signal when not hitting the pad.
However when I hit the snare, sometimes, after the initial hit, I get a flow of signal of 38 velocity hits forever until I hit the snare again. When this is stopped, no random signal will occur until I hit the pad again.
I am happy with my snare's threshold being between 0-2, I just love the sensitivity. But in order to tackle this "signal flow" problem I have to set the threshold way up until that signal is below the threshold itself.
Also this seems to happen only when I plug all my other pads into megadrum, when I only plug the snare input I can get threshold to 2, but below that I will have "signal flow" again....strange..
How can I fix this?

Re: Random signal flow on snare input.

PostPosted: Tue Sep 18, 2012 7:37 pm
by dmitri
I've never been able to use Thresholds below 4-5 for any pads/cymbals I have. I can only recommend to raise the Threshold.

Re: Random signal flow on snare input.

PostPosted: Wed Sep 19, 2012 3:11 am
by jackiecorn
The thing is, the number and the type of pads I plug into the other inputs seem to affect the signal level on the snare(or other inputs), I think this has to do with the resistance added to the circuit by the voltage dividers of other pads.
Without the other pads plugged in, snare works perfectly.

Re: Random signal flow on snare input.

PostPosted: Wed Sep 19, 2012 6:00 am
by everson
I can`t seem to go lower than 16-17. That`s pretty high ... Is there anything I can do about it?

Re: Random signal flow on snare input.

PostPosted: Wed Sep 19, 2012 8:35 pm
by dmitri
There is a relation between Gain and Threshold - the higher Gain the higher you have to set Threshold to prevent false triggering and the lower Gain the lower you can set Threshold without causing false triggering.

Re: Random signal flow on snare input.

PostPosted: Fri Sep 21, 2012 3:32 pm
by jackiecorn
dmitri wrote:There is a relation between Gain and Threshold - the higher Gain the higher you have to set Threshold to prevent false triggering and the lower Gain the lower you can set Threshold without causing false triggering.

True.
And I always try to keep my Gain on 0 or as low as possible as I consider gaining "distorting" the raw signal more than keeping a hot signal cooled to a desired level.
So any explanation on the relationship between the number/type of plugged inputs and the threshold that a pad can turn down before it hits the signal flow?

Re: Random signal flow on snare input.

PostPosted: Fri Sep 21, 2012 4:07 pm
by dmitri
It can be a number of things - output impedance of pads, lengths of cables, stereo cables used with single zone pads and etc. The main thing is that connecting pads to MegaDrum will introduce very small, but noticeable, electrical noise on all inputs so if you turn Threshold down too much this electrical noise can cause false triggering. The sensitivity on inputs is limited mostly by the electrical noise and this is why you cannot set Thresholds to zero or very close to it.

Re: Random signal flow on snare input.

PostPosted: Fri Sep 28, 2012 5:23 pm
by jackiecorn
I just want to update to this thread to say what I really found to be the problem of this.
All this signal bull crap is due to A BAD SOLDERING JOB, that is, I have a lead hanging and barely touching the contact point.
After resoldering it firmly, I can get my snare to have a Threshold value of 0, absolutely amazing sensitivity and performance!

Re: Random signal flow on snare input.

PostPosted: Fri Sep 28, 2012 5:34 pm
by everson
0?!?
Amazing!
Could you post a video of the snare performance?