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 Forum index » DIY Hardware and Software » Developers' Corner
Any simple bass drum schematic? or snare?
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TtF



Joined: Mar 28, 2014
Posts: 1
Location: Brussels

PostPosted: Fri Mar 28, 2014 5:07 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi, This is my first post on this forum, I was looking for a simple no-808/909 analog bassdrum and I found this one Very Happy
I'm a pure rookie in electronics so I have few questions if someone can answer that would be great !
I think I'll make 3 voice modules + 1 amp module (with 3 inputs), all based on monotribe's drums, but I was thinking it was possible to output voices into another amp to extend sound-grain possibilities. I was wondering if it's possible to add a volume knob to each voices modules and also one to the amp (How people do on the monotribe ? are drums volume pre-mixed ?...).
I'm fond of Roland Grooveboxes and there are just 2 negative points that I noticed on theese machines : - No analog Crying or Very sad ; - No modularity Crying or Very sad (Excepted for the MC-307 wich is one of the most powerful thing I ever seen, don't mind about AudioFanzine reviews and YouTube videosn, thoose guys often don't understand the main idea of this groovebox) Sorry for this digression. So all that to say that theese Monotribe's drums wi'll perfectly fit in my project of groovebox-oriented modular Smile
Sorry for this bad English Embarassed

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Blue Hell
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Joined: Apr 03, 2004
Posts: 20681
Location: The Netherlands, Enschede
Audio files: 156
G2 patch files: 318

PostPosted: Sat Mar 29, 2014 11:49 am    Post subject: Reply with quote  Mark this post and the followings unread

I have no idea about eight oooh things .. but welcome to you anyway TtF.
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ragnar



Joined: Nov 14, 2014
Posts: 2
Location: Iceland

PostPosted: Sat Nov 15, 2014 6:08 am    Post subject: I know this thread is old but Reply with quote  Mark this post and the followings unread

I just put the bass drum together, its not working as I was expecting.
I don´t have a noise source a.t.m., that must have something to do with it :Þ

I was wondering if you could clarify how to connect speakers to this, I get some potting sound when I connect speakers to "rhythm" and ground. its not sounding too far from the pulse Im sending in on the input stage.

the noise generator you have built, the two transistor white noise one. where do you connect that into the circuit, right before the output transistor stage ? where it says bd out on the schematic ?

the decay is not doing much either, I have a 1k pot connected from the middle pin to one of the far ends to ground. is this the right way to connect it, as a variable resistor ?

thanks for taking your time to answer questions here, super helpful to have people like you around the world !

all the best
r.
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khakifridge



Joined: Jul 15, 2014
Posts: 9
Location: UK

PostPosted: Mon Nov 17, 2014 2:01 am    Post subject: Re: I know this thread is old but Reply with quote  Mark this post and the followings unread

ragnar wrote:
I was wondering if you could clarify how to connect speakers to this, I get some potting sound when I connect speakers to "rhythm" and ground. its not sounding too far from the pulse Im sending in on the input stage.


Are you connecting a naked speaker to the output? I think you'll need an amplifier of some sort.

Quote:
the noise generator you have built, the two transistor white noise one. where do you connect that into the circuit, right before the output transistor stage ? where it says bd out on the schematic ?


I don't think the noise generator features in the BD sound - it's only connected to the hi-hats and snare circuits.

Quote:
the decay is not doing much either, I have a 1k pot connected from the middle pin to one of the far ends to ground. is this the right way to connect it, as a variable resistor ?


Sounds correct. There's a schematic on page 1 showing how to connect the pot.
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ragnar



Joined: Nov 14, 2014
Posts: 2
Location: Iceland

PostPosted: Mon Nov 17, 2014 4:57 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks khakifridge
I went over the breadboard last night and I had connected the what should have gone into the collector into the emitter, :Þ.

it works now! love the sound, can believe how few components are needed for this one...

thanks again.
all the best.
r.
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khakifridge



Joined: Jul 15, 2014
Posts: 9
Location: UK

PostPosted: Tue Nov 18, 2014 12:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Good news! Cool

This one was on my list of possible BDs to try out. From what you've said, I think it definitely warrants a build.
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