Building a new drum synth

Skrog Productions · Posted: Mon Dec 22, 2014 4:50 pm Post subject:

Thomas Henry MPS number 2 finished first with mfos dual A/R generator.
I wanted a couple of A/R generators with repeat function and a couple of simple LFO's (lfo's to be fitted on MPS number 1 module, under construction).
These will be used to modulate the mps , cynare , mfos VC echo, mfos VC pan & battery acid CV , when required.
Slowly getting near the end Smile

.

Dave.

MPS module 2 & dual AR.jpg

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MPS no.2 & dual AR.jpg

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Skrog Productions · Posted: Sat Jan 10, 2015 5:03 am Post subject:

Hi all , I managed to get a little bit of soldering done over the past week....

MPS with 2 mfos simple skew lfo's added at the end finished now .

2 finished MPS's.jpg

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Skrog Productions · Posted: Sat Jan 10, 2015 5:17 am Post subject:

And also got the Quad-BASS++ finished too Smile

after a battle with finding a little slither of copper between tracks on my veroboard daughter board for the pitch bump & wave mods , got it though and working now Smile

.

That's all the sound making panels loosly fitted in place in the case, now the long list of snagging jobs to do (wrong direction pots , couple of volume level increases & wire the FX send rotary switches to the modules that don't have an audio output jack on their panels.

Dave.

Quad Bass++.jpg

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Skrog Productions · Posted: Sun Jan 11, 2015 9:06 am Post subject:

Hey hey Finished , phew , Smile

, ............

testing & demo Sounds & stuff to come through the week ..........

DIY Drum Synth Finished.jpg

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blue hell · Posted: Sun Jan 11, 2015 12:14 pm Post subject:

looks great!

party!

roglok · Joined: Aug 28, 2010 Posts: 202 Location: uptown

great job!

mcop · Joined: Apr 27, 2012 Posts: 46 Location: Brighton UK

Awesome! looking forward to the demo's.

roglok · Joined: Aug 28, 2010 Posts: 202 Location: uptown

may i ask whether you considered a central bus system for the gate/trigger/cv inputs and if yes, what made you go completely modular?

Paradigm X · Posted: Mon Jan 12, 2015 3:17 am Post subject:

Incredible work, looks amazing.

Cool

Skrog Productions · Posted: Wed Jan 14, 2015 11:36 am Post subject:

Thanks Jan , roglok , mcop , Ben Smile

Dave.

drum synth plumbed in.jpg

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Skrog Productions · Posted: Wed Jan 14, 2015 11:51 am Post subject:

Skrog Productions · Posted: Wed Jan 14, 2015 1:03 pm Post subject:

A bit of info about the build...........

Top Row Left..
808 kick & snare :- Eric Archer layouts + some mods
808 HH's / Cymbal / cowbell :- Minus layouts on electro-music.

http://www.ericarcher.net/

http://www.electro-music.com/forum/topic-54826.html

http://www.stereoping.com/e-drums/?lang=en

By studying these pages and the 808 service manual I was able to cross reference between them to help me lower the tuning of the kick and extend the decay a little on the snare & cymbal.

2X CYNARE :- as the original CGS47 cynare with the 6 shimmer control pots brought out to the panel.

http://www.cgs.synth.net/

Mega Percussive Synth :- Got these in 2009 standard build without inserts .

http://www.birthofasynth.com/Thomas_Henry/Pages/MPS.html

Bottom Row Left.....

Nein oh nein :- as per purchased pcb kick, snare , rimshot, claps, with all the mods done in the documents.

http://cv.hexinverter.net/?page=projects&id=neinohnein--kick-drum-v10

Quad Bass++ :- as the original plan with bump mod and Wave mod.

http://www.birthofasynth.com/Thomas_Henry/Pages/Bass_Plus.html

http://www.electro-music.com/forum/topic-53420.html

http://electro-music.com/forum/topic-40457.html

Pan Control :- all the modules have their own volume out controls, the outputs from each module are wired in screened cable to this panel's veroboad circuits , nearly all the voices were reasonably balance in level , only a couple of drum sounds needed a little pre amp to boost.

Mfos oldies but goodies pan mixer

http://www.musicfromouterspace.com/forums.html?MAINTAB=SYNTHDIY&PROJARG=OLDIESBUTGOODIES/AUDIOMIXER/panningmixer.html&VPW=1124&VPH=500

FX and mixer :- Hexinverter battery acid CV , compressor & MXR distortion built as per document & pcb , stand alone FX
,Drum voices or external sounds / instruments can be pluged into it.

http://cv.hexinverter.net/?projects=batteryacid-cv-diy-version-of-idow-edition

Mfos cv panner speaker simulator , the outputs are hard wired to the stereo bus , input level is set with a trimmer on the pcb it is set for the drum modules levels only.

2x Mfos CV echo , built as per design & pcb , these are both stand alone FX (in & out jacks).

http://www.musicfromouterspace.com/forums.html?MAINTAB=SYNTHDIY&PROJARG=STEREOPANNER/STEREOPANNER.html&VPW=1124&VPH=500

http://www.musicfromouterspace.com/forums.html?MAINTAB=SYNTHDIY&PROJARG=ECHOFXXX/ECHOFXXX.php&VPW=1124&VPH=500

The two rotary switches are FX sends for the modules that don't have an audio output socket on their panels , rotary 1 handles Bass++ 1,2,3 & 4.
Rotary 2 handles Cynare 1&2, MPS 1&2 , both selectors send their signals through a unity gain buffer to the single socket under their dials ready to patch to FX .

The little 5 channel pan mixer above those acts as FX returns to the stereo bus or plug an external instrument in if needed or the returns from an external FX unit .

That's my brain empty of drum info now , I'm off to programme some demo patterns Very Happy

Dave.

Skrog Productions · Posted: Sat Jan 17, 2015 11:45 am Post subject:

Hi

Sounds......

First mp3 ...jam & dial twist 808 kick / snare / hi hats / cymbal & cowbell , (dry sound , no FX).

Second mp3...808 sounds & a bass line , (no FX).

third mp3... 808 you suffer, but why? , .

fourth mp3... 909 sounds & bass++ sounds (lfo's into bass++ cv inputs).

fifth mp3... 808 / 909 / cynares / MPS's (mfos echo on cymbal).

Drum synth 808 sounds.mp3

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Drum synth 808 & bass line.mp3

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Drum synth 808 you suffer but why.mp3

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Drum synth 909 & quad bass++ sounds.mp3

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Drum synth 808 909 cynares mps's.mp3

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DUBmatze · Posted: Sat Jan 17, 2015 8:56 pm Post subject:

nice build, nice build documentation, nice link overview and nice sound samples !!!!

Skrog Productions · Posted: Mon Jan 19, 2015 11:41 am Post subject:

Thanks DUBmatze Smile

Been a long project but fun (at times) Very Happy

roglok · Joined: Aug 28, 2010 Posts: 202 Location: uptown

very cool demos. i like the sound of your 808, the low-pitched cowbell sounds nice. did you install a switch for the timing caps or is it fixed?

roglok · Joined: Aug 28, 2010 Posts: 202 Location: uptown

Skrog Productions · Posted: Tue Jan 20, 2015 10:31 am Post subject:

Paradigm X · Posted: Tue Jan 20, 2015 11:26 am Post subject:

looks and sounds amazing man... what a drum box.

great demos too, they all sound fat as fook.

Nice one.

Skrog Productions · Posted: Tue Jan 20, 2015 11:37 am Post subject:

Thanx Ben , really chuffed with it , Smile

isak · Posted: Tue Jan 20, 2015 3:38 pm Post subject:

Hi Dave.

kick ass work man, its not a drum box...its a DREAM BOX Cool

i was very happy to follow this post, keep up your great building posts.

cheers,
Isak E Smile

Skrog Productions · Posted: Wed Jan 21, 2015 1:40 pm Post subject:

Thanks Isak Smile

mcop · Joined: Apr 27, 2012 Posts: 46 Location: Brighton UK

Sounds great. Hope you have a lot of fun with it.

Skrog Productions · Posted: Sat Jan 24, 2015 2:00 am Post subject:

Thanks mcop Smile