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 Forum index » DIY Hardware and Software
Synbal
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THeff



Joined: Sep 01, 2006
Posts: 218
Location: Florida
Audio files: 30

PostPosted: Tue Oct 09, 2007 6:58 pm    Post subject: Synbal Reply with quote  Mark this post and the followings unread

All,

This same basic circuit is in the Synbal a project from E&MM Feb. 1983:

There is a Synbal (and Syntom) PCB floating around the web. I have built up one PCB for this and have another waiting to populate. With the filter on board it works very well. I will say that the overall pitch of the oscillators is rather unstable if there are any power supply glitches.

I can post the PCB if anybody wants it.

Regards,

Tim

[Note Blue Hell: this was split off from http://electro-music.com/forum/topic-20622.html where it started as a striking similarity, now turning into a project ]


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Nosferatu



Joined: Jul 27, 2007
Posts: 234
Location: Planet Rock.

PostPosted: Wed Oct 10, 2007 5:26 am    Post subject: Re: Synbal noise / cymbal circuit Reply with quote  Mark this post and the followings unread

Synbal, syntom, syndrum.

Edit: Many thanks to bluhell for maintaining thread consistency.

Last edited by Nosferatu on Thu Oct 18, 2007 1:07 pm; edited 2 times in total
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fluxmonkey



Joined: Jun 24, 2005
Posts: 696
Location: cleve

PostPosted: Wed Oct 10, 2007 10:03 am    Post subject: Reply with quote  Mark this post and the followings unread

THeff,

thanks for posting this... as i posted before, there's plenty of precidence for mixing multiple oscs together via gates, nice to see another example in the context of this discussion. including a filter has obvious advantages, a'la MFOS's WeirdSoundGenerator... would be great to get the PCB layout if you don't mind.

and gratitutde extends to anyone who goes out of their way to post information to add to the collective knowbase... your generosity deserves only praise, not public scolding...

b
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THeff



Joined: Sep 01, 2006
Posts: 218
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PostPosted: Wed Oct 10, 2007 3:30 pm    Post subject: Synbal...more info Reply with quote  Mark this post and the followings unread

Hi bbob,

Thanks for noticing the similarity!

Hmmm...let me see 6 cmos oscillators using 40106 inverters, mixed with 4070 xor gates, and a pitch adjustment by setting the oscillator B+ voltage. Seems rather similar to the schematic at the top of this thread!

The Synbal is only a percussion device if you use it that way. Change the feedback resistors in the cmos oscillators with potentiometers and you will get amazing "machine sounds". You also get a white noise generator, nice voltage controlled filter, trigger circuit, and stereo panning.

I only mentioned it on this thread to let people know that the pcb from this article is on the web and might make it a lot easier to build.

I was going to remove it until I noticed that it had been viewed 12 times, so I guess there is some interest out there.

Anyway, the pcb is attached and I will add the rest of the article to show the parts placement on the pcb. The article was scanned by a guy that goes by the name "Synth Ollie" so he gets all the credit! Laughing

Enjoy,

Tim


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Blue Hell
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Joined: Apr 03, 2004
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PostPosted: Wed Oct 10, 2007 4:22 pm    Post subject: Re: Synbal...more info Reply with quote  Mark this post and the followings unread

THeff wrote:
Seems rather similar to the schematic at the top of this thread!


Yup, I think so. Still this is developing into a new project that deserves a thread of it's own. So I'll be splitting off some posts to a new topic "Synbal".

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factus10



Joined: Jun 20, 2007
Posts: 158
Location: Buffalo, NY

PostPosted: Wed Oct 10, 2007 5:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

Awesome! I've been thinking about the EM&M drum circuits of late. So... what about the Syntom, etc Wink
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THeff



Joined: Sep 01, 2006
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PostPosted: Wed Oct 10, 2007 8:10 pm    Post subject: Syntom II, also... Reply with quote  Mark this post and the followings unread

Hi factus10,

The Syntom II article is here:

http://www.experimentalistsanonymous.com/diy/forums.html?subdir=Schematics%2FFull%20Synths%20Drum%20Synths%20and%20Misc%20Synth&sortby=name

The PCB is attached. Once again the credit for the PCB scan goes to Synth Ollie.

Enjoy,

Tim


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synth_ollie



Joined: Sep 11, 2006
Posts: 149
Location: sweden

PostPosted: Wed Oct 10, 2007 11:37 pm    Post subject: Re: Synbal...more info Reply with quote  Mark this post and the followings unread

THeff wrote:
The article was scanned by a guy that goes by the name "Synth Ollie" so he gets all the credit! Laughing


I guess that must be me then! Very Happy
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23isgood



Joined: Nov 18, 2006
Posts: 236
Location: San Francisco, CA bay area
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PostPosted: Thu Oct 11, 2007 1:43 am    Post subject: Reply with quote  Mark this post and the followings unread

This circuit is almost exactly like Ken Stone's, Cynare. I would like to build one of these.
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THeff



Joined: Sep 01, 2006
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PostPosted: Thu Oct 11, 2007 9:02 am    Post subject:  Greetings to Synth Ollie Reply with quote  Mark this post and the followings unread

Hi Synth Ollie!

We have never spoken before, but thank you for scanning these pages. I have made several of the Synbal and Syntom II pcbs as a result of your efforts and they work great. I perfboarded the MIDI/Trigger section from Trevor Pages's 9090 and it works very well as the controller for Synbal, Syntom II and other misc. percussion circuits floating around. I have also triggered these guys from the Klee 2 sequencer and that was fun. I want to setup a complete percussion section similar to the Russian link that was on YouTube. It looks like the web link for the Russian sight has been removed.

Thanks again!

Regards,

Tim
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Scott Stites
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Joined: Dec 23, 2005
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PostPosted: Thu Oct 11, 2007 7:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
your generosity deserves only praise,


Especially in light of the fact you're the only guy I know who could perf the thing up in the time it took to write the post Laughing

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THeff



Joined: Sep 01, 2006
Posts: 218
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PostPosted: Thu Oct 11, 2007 9:08 pm    Post subject:  Perfboards... Reply with quote  Mark this post and the followings unread

Thanks Scott, but I must of told you a million times not ro exaggerate! Laughing

Tim
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ickystay



Joined: Nov 15, 2006
Posts: 139
Location: Oregon

PostPosted: Wed Oct 17, 2007 8:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

Big thanks to synth_ollie!
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San



Joined: Mar 13, 2012
Posts: 4
Location: Poland, Warsaw

PostPosted: Mon Sep 10, 2012 11:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

Anyone with music samples?
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n.d



Joined: Dec 15, 2011
Posts: 22
Location: Argentina

PostPosted: Wed Nov 07, 2012 10:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Not my channel, but here are some useful videos, soundwise..

https://www.youtube.com/user/tecbugdemos?feature=watch
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