diy 3-zone ride Roland compatible

Discussions related to MegaDrum Hardware

diy 3-zone ride Roland compatible

Postby stefan1982 » Tue Apr 25, 2017 6:46 am

Am I right that this scheme is compatible with a Roland-module, and also works with MegaDrum?

Image

I'm really trying to understand how it works, but could not fully understand it..
Could someone please explain how this works? And is a 10k resistor not needed in such a diy-cymbal? I remember seeing the inside of the Roland-cymbal, which does have some resistor(s).
Hope one could clarify things a bit..
stefan1982
 

Re: diy 3-zone ride Roland compatible

Postby dmitri » Tue Apr 25, 2017 11:27 am

Roland style 3 way cymbal uses two stereo jacks (4 inputs), Yamaha style uses one stereo jack (2 inputs).
If it is a DIY 3-zone cymbal, why follow Roland style instead of Yamaha style?
Regardless, MegaDrum will work with both styles and because Roland style uses separate inputs for edge and bell switches, 10k resistor on the edge switch is not needed.
dmitri
Site Admin
 
Posts: 8654
Joined: Fri Aug 03, 2007 8:05 pm

Re: diy 3-zone ride Roland compatible

Postby stefan1982 » Tue Apr 25, 2017 12:16 pm

Well, to answer your question.. In the future I will own a Roland TD-30, so it would be nice if the cymbals are future proof. And that would make it the main reason why I would like to make it the Roland way.
I don't think a Yamaha cymbal could be easily rewired to behave on a Roland-module, allthough it'll be much easier on the inputs.
stefan1982
 

Re: diy 3-zone ride Roland compatible

Postby stefan1982 » Tue Apr 25, 2017 2:38 pm

The other take would be the Yamaha-stye cymbal, which you are talking about..
Image

I looks a lot simpler, although it's difference is all in the wiring..

So, to be short: MegaDrum knows what the difference is between edge-switch and bell-switch only by the resistor, and takes the velocity of all strikes using a single piezo?
stefan1982
 

Re: diy 3-zone ride Roland compatible

Postby ignotus » Tue Apr 25, 2017 3:00 pm

stefan1982 wrote:So, to be short: MegaDrum knows what the difference is between edge-switch and bell-switch only by the resistor, and takes the velocity of all strikes using a single piezo?
Correct. If you're going to be getting a Roland module at a later date it makes more sense to just wire it for that - it's not as if you're going to run out of inputs with your MD meanwhile ;). Also, I don't think Roland cymbals have any resistors in them - they have a small PCB but I think that's just to mount the jacks and connectors on it.
If it ain't broken... fix it until it is.
ignotus
 
Posts: 881
Joined: Sat Nov 24, 2007 11:36 am

Re: diy 3-zone ride Roland compatible

Postby stefan1982 » Tue Apr 25, 2017 3:08 pm

Question remains that I wonder how a module (megadrum or Roland) knows when the cymbal is chocked, or when it should play the edge sound.
Any idea?
stefan1982
 

Re: diy 3-zone ride Roland compatible

Postby dmitri » Tue Apr 25, 2017 3:22 pm

MegaDrum knows the difference by measuring the time the switch is "made".
dmitri
Site Admin
 
Posts: 8654
Joined: Fri Aug 03, 2007 8:05 pm

Re: diy 3-zone ride Roland compatible

Postby stefan1982 » Wed Apr 26, 2017 3:48 pm

dmitri wrote:MegaDrum knows the difference by measuring the time the switch is "made".

Right, you mean the time the switch is closed, before it is getting opened again (normally open-switch).. So, does the Roland module know this too in the same way?

Because I know that the choking of Roland cymbals is underneath the cymbal, I *suppose* that the edge trigger is positioned on top of the cymbal. Which make it 2 separate switches instead of 1, which is in the drawing above. is my assumption right that this means that a Roland-cymbal had 3 switches (bell/edge/choke), and a MegaDrum 3-way cymbal could do the same with only 2?

So, my final question would be.. if I build a cymbal like the above Roland-schematic, do I have bell/bow/edge sound and choking of the cymbal working at both the Roland-module, AND the MegaDrum TMI?
stefan1982
 

Re: diy 3-zone ride Roland compatible

Postby ignotus » Wed Apr 26, 2017 4:01 pm

The switch under the edge of the Roland cymbal is wired to the same point as the one above it - I think it's just there to make it easier to grab and choke. That wiring in the first post should work for both, yes.
If it ain't broken... fix it until it is.
ignotus
 
Posts: 881
Joined: Sat Nov 24, 2007 11:36 am

Re: diy 3-zone ride Roland compatible

Postby airflamesred » Wed Apr 26, 2017 4:15 pm

stefan1982 wrote:Well, to answer your question.. In the future I will own a Roland TD-30

Why on earth, Sir, Do you wish to own a TD 30, may I ask?

koby drums - Triggera krigg/Bix - megadrum - Kontakt........... Samples from all and sundry.
airflamesred
 
Posts: 1196
Joined: Fri Mar 30, 2012 1:58 pm
Location: Hammersmith

Next

Return to MegaDrum Hardware

Who is online

Users browsing this forum: No registered users and 115 guests

cron