OT - Percussion generator?

[Marcos - Munky]

Anybody know some circuits to generate percussion sounds? I want to build one for me, but the only things that I found are bass drums, snares and woods. I need some ride and crash cymbals, toms and a hi-hat circuit with a momentary switch to get open and close sounds. All activated by a momentary switch.

[Maneco]

Hi,
for good cymbal sounds,there's a 909 sounds generator clones in...

http://www.resonance.fsnet.co.uk/

and here

http://www.colinfraser.com/tr909/my909.htm

i think everything's there,including the eprom images for the cymbal sounds...you'll need an eprom programmer...here there is one...

http://www.techedge.com.au/tech/eprom/default.htm

hope this information is useful

Bom Natal


Maneco

[Paul Perry (Frostwave)]

http://www.midwest-analog.com/
This is THE place, if yu wat to build a percussion kit (they sell pcbs).
My only complaint is that their stuff sounds TOO MUCH like a 'real' set...
but I think that could be fixed

[Nasse]

Marcos wrote:

"I need some ride and crash cymbals, toms and a hi-hat circuit with a momentary switch to get open and close sounds. All activated by a momentary switch..."

I think the suggested links are somewhat complicated designs, but seemed super quality, thanks for nice links and circuits.

Ride and crash and hi-hats are quite difficult to create "analoque" way, and I think that 909 solution is sample playback for symbals section. And because it is not easy to make good cymbal sounds electronically (exept sampling) the circuits are rare. If you are planning to use your drums live, I suggest getting real cymbals and hihats and just make other instruments electric...

Filtered and envelope controlled noise does not sound much like cymbals or hi-hats, but I think cheesy cheapo drum boxes used this method. I have one circuit lying somewhere that uses four squarewave VCO:s
whose outputs are connected trough XOR logig gates, needs some envelope generator.

I found an old XR2206 drum synth application when trying to find some old cmos circuits, bummers I did not find it yet... Maybe I can post the schem some day soon... It is voltage controlled sine wave generator, makes powerful bass drum, tom tom and (with some noise added) snare sounds, just trigger it with cheapo piezo mic attached to a piece of wood with some thick rubber mat glued on top, bounces like real drum head...but it can blow your speakers, sounds so huge :roll:

[mattv]

http://www.angelfire.com/electronic/epeasant/projects/ssdrums/ssdrums.html  

[Mark Hammer]

There was a terrific cymbal synthesizer in Electronics Today way back when, using several CMOS chips for ring-modulated ring-modulators to generate the noise, and an op-amp based state variable filter to tune the noise.  I built a few some years ago and was very impressed with the realism.  The project article comes with a PC layout.  I can send you a scan, but don't have it here at the moment.

One version of the same circuit showed up in E&MM in 1983.  You can find a scan of it here: http://www.physicsenterprises.andrews.edu/diy_archive/schematics/drums/

Download the file called "Useful drum circuits (Synbal, Syntom2)".  The zipfile contains 3 scanned TIFs of the Synbal article.  It's about 90% the same, but unfortunately it does not have a PCB layout.

[tambek]

guitar pedals are a piece of cake compared to these giants!

but it could be blody interesting...

I think I might wanna try building one someday. or... open up a factory where people build those... yeah...

[Marcos - Munky]

Thanks to all. I will take a look and try to build something.

[Paul Perry (Frostwave)]

"The complete plans for the Clangora hi-hat cymbal appeared in the November 2003 issue of Nuts & Volts magazine."
- I guess a few people here have seen this, seeing as teve Daniels is an ocassional contributor to N&V!

[Paul Perry (Frostwave)]

"The complete plans for the Clangora hi-hat cymbal appeared in the November 2003 issue of Nuts & Volts magazine."
- I guess a few people here have seen this, seeing as Steve Daniels is an ocassional contributor to N&V!
whoops duplicate !

[ian87]

marcos -- very much looking fwd to seeing and hearing what you come up with -- i'm VERY interested!

p.s.: i have a fried Cort Drummer unit -- i can take pics of that circuit if you think it might be of any use at all.

-ian

[Marcos - Munky]

I found this site with some simple generators. I will try the bass drum first. I have a magazine here with some circuits too, I will try to scan it.
http://members.shaw.ca/roma/sixteen.html

[analogguru]

Munky, depending on which quality you want.....
Gott stuff is CORON DS-7 and even better TAMA TS-305

You can find the links on my Homepage:

www.anubics.com

follow "Schematics by Manufacturers".

Also for analog drums the sound part from Boss DR-55, DR-110
Roland TR-606, the famous TR-808 and more


Digital stored look for Oberheim DX, DMX,  Sequential Drumtracks etc. Paul White has a HP with original Eprom-files of this units and also the legendary Linn stuff. (Links not placed yet, I have to work too   )

Merry X-mas

analogguru

[Mark Hammer]

Schematics for most of the classic Korg and Roland drum machines is posted on the net.  In some cases, you can isolate the drum voice circuits, in other cases they are a little harder to turn into separate modules.  The schematic for the PAiA drum voice board can be found here: http://www.paia.com/drumtone.gif

I have a few more drum module projects from Polyphony that I can scan and send you.  We're driving out of town tomorrow morning so I may not be able to scan them until next week.

I will put in a vote again, though, for the cymbal synthesizer circuit I noted earlier.  It does a wide variety of cymbal sounds, and because of the way it generates noise, all you need to do is change a capacitor value here and there to produce cymbals that have different characters and voicings.  Add the flexible filter on top of that and you have a very wide range.

[Marcos - Munky]

Thanks to all. I built this one:

Isn't very realist, but can do the job when you want only to play in your house. It have a low volume, maybe a preamp will help.

[Paul Perry (Frostwave)]

Marcos, despite what the circuit says, I don't think that cap across the output is really a 'sustain' control. Try making it a lot smaller & see it it gets louder.... (please tell me if I'm wrong, as well!)

[Marcos - Munky]

I will try it.