Trimpot added and auto high level still 992

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Trimpot added and auto high level still 992

Postby DruminMD » Wed Sep 12, 2012 12:02 am

I've tried a 47k ohm trimpot and a 100k ohm trimpot on my DIY mesh head snare. Without the trimpots the drum is not playable -- it's full volume all the time with no dynamics at all. With either the 47k or 100k ohm pot the feel of the drum is much improved with dynamics, etc. However, the auto high level still registers 992 even with the pots all the way down. So according to what I read that means that this drum is still too "hot."

Any suggestions or comments on why the reading is still 992 even with the trimpots?

Thanks,

Mike
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Re: Trimpot added and auto high level still 992

Postby dmitri » Wed Sep 12, 2012 9:13 pm

DruminMD wrote:However, the auto high level still registers 992 even with the pots all the way down.

Are you sure it's all the way down? With the pot all the way down there shouldn't be any signal at all. Maybe you connect the pot 'inline' with the signal wire and not as a voltage divider? But even in this case there should be only very weak signal left.
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Re: Trimpot added and auto high level still 992

Postby DruminMD » Wed Sep 12, 2012 9:20 pm

dmitri wrote:
DruminMD wrote:However, the auto high level still registers 992 even with the pots all the way down.

Are you sure it's all the way down? With the pot all the way down there shouldn't be any signal at all. Maybe you connect the pot 'inline' with the signal wire and not as a voltage divider? But even in this case there should be only very weak signal left.


When I turn the pot all the way down the drum does turn off -- no signal at all. I then turn it up bit by bit until I can hear the snare sound again. Then when I turn auto high level on and give a few whacks it's registering 992.
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Re: Trimpot added and auto high level still 992

Postby dmitri » Wed Sep 12, 2012 9:25 pm

Hmm, it seems to me the pot might be not wired right. Double check it against http://www.megadrum.info/forums/viewtop ... 911#p11911
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Re: Trimpot added and auto high level still 992

Postby DruminMD » Wed Sep 12, 2012 9:34 pm

dmitri wrote:Hmm, it seems to me the pot might be not wired right. Double check it against http://www.megadrum.info/forums/viewtop ... 911#p11911


OK. I'll check. Not sure why it plays better though?
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Re: Trimpot added and auto high level still 992

Postby DruminMD » Thu Sep 13, 2012 5:24 pm

OK. I double checked the wiring and did a new cable with 2 47k ohm trimpots. I used a voltage meter to confirm that the pot is reducing the voltage on the tip and ring.

However, even with the pot turned to the maximum attenuation, I'm still getting auto high level of 992.

I notice the difference if playing and in the sound but the meter on megadrum still shows 992.

Any other suggestions about how to lower the high level in order to get more dynamics?
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Re: Trimpot added and auto high level still 992

Postby dmitri » Thu Sep 13, 2012 5:32 pm

Are you sure you set the HighLevel value to the minimum - 64 - before each test?
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Re: Trimpot added and auto high level still 992

Postby DruminMD » Thu Sep 13, 2012 5:42 pm

dmitri wrote:Are you sure you set the HighLevel value to the minimum - 64 - before each test?


Yes. I just tried it again. This time the highlevel was 990. Interestingly, I tried the same cable on the first rack tom and got highlevel of 833. Is there something physical that I should try with the snare?
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Re: Trimpot added and auto high level still 992

Postby dmitri » Thu Sep 13, 2012 7:24 pm

It's hard to say. The snare might be producing ocasinal signal spikes above maximum level which confuses high level autodetaction. The main thing is that the snare should produce maximum velocity MIDI notes only on your hardest hits consistently.
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Re: Trimpot added and auto high level still 992

Postby ibanman555 » Fri Oct 05, 2012 6:11 am

Where are you at with this now DruminMD?? Any resolution?
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