Joined: Jan 21, 2010 Posts: 7 Location: Bristol,UK
Posted: Wed Jul 20, 2011 11:52 am Post subject:
Thanks rosch,
I'm intending to build and sell this as a ready made synth in small volumes (to supplement the meagre income from my day job ), so no plans to make the code available.
But happy to answer any questions, and grateful for the feedback received.
Joined: Nov 07, 2009 Posts: 78 Location: Surrey, UK
Audio files: 2
Posted: Sun Jul 31, 2011 9:14 am Post subject:
Okay, high time I unveiled the project that has been keeping me occupied for the last 18 months - behold The Mightier Mirlitzer (I prematurely named my Sound Lab 'The Mighty Mirlitzer' and now have to go one better):
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_________________ Life is like an analogue sequencer. Twiddle the knobs to avoid boredom.
Joined: Nov 07, 2009 Posts: 78 Location: Surrey, UK
Audio files: 2
Posted: Sun Jul 31, 2011 9:36 am Post subject:
The design criteria for 'The Mightier Mirlitzer' are as follows:
1. Keep it simple. Some of the modules are primitive but effective.
2. Each cabinet is approximately two feet wide and accommodates 8.75" (5U) panels. Standard panel widths are in multiples of inches (2" is the norm).
3. Each cabinet contains its own individual power supply giving +/- 12V at 1A (12V transformers are easier to find surplus than 15V ones). A power supply failure will only take out one cabinet, and each supply is sufficiently overrated to power a second cabinet in an emergency. In a REAL emergency, two 12V gel cells will do the job.
4. Each cabinet can play autonomously, containing at least one 'player' module (sequencer, pattern generator, S&H etc.) and at least one oscillator. Thus, individual cabinets can be extracted for demonstration or live use.
5. The MM is DIY down to the component level. Each module is built on stripboard or homebrew PCB. You can see that the front panels are colour-coded and no expense has been spent.
6. I have a 2' 6" wide gap between desks in my tiny home studio, in which fits a cheap veneered TV table. The MM is being erected vertically upwards from there. I figure I have room for six or maybe seven cabinets at a pinch. Two-and-a-half are filled (see photos); one will be a big sequencer and another one will be a Lunetta, offering both sound and timing signals for the rest of the monster, as well as operating stand-alone.
7. Eventually, the MM will meet the definition of a 'monster synthesizer', namely, if it falls on me, it will cause death or at least serious injury.
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_________________ Life is like an analogue sequencer. Twiddle the knobs to avoid boredom.
Joined: Nov 07, 2009 Posts: 78 Location: Surrey, UK
Audio files: 2
Posted: Sun Jul 31, 2011 12:14 pm Post subject:
Thanks!
I forgot to mention that I used quarter-inch jacks because they're cheap, robust, reliable, compatible with everything else in the studio, and you can buy ready-made patch cords cheaply in a variety of lengths and colours. After all, who would want a black synthesizer?
On the other hand, the Lunetta will use phono connectors. They're cheap, robust, small and can be connected with a bare wire and a matchstick in an emergency... _________________ Life is like an analogue sequencer. Twiddle the knobs to avoid boredom.
On the other hand, the Lunetta will use phono connectors. They're cheap, robust, small and can be connected with a bare wire and a matchstick in an emergency...
not technically finished as such, but i'm proud of my efforts so far and just got the prototype pcb's back from the fab house.
and populated it today.
its an analogue dub siren i built for a few friends, based around the amdek PCK-100 and the DS7. resettable LFO, Tri/Sqr wave VCO, decay envelope generator and VCA. i used the other half of the lm13700 to use as a voltage control for the VCO instead of it going to waste. the strip board version worked a treat so i'm keen to finish this to see how it holds up!
its an analogue dub siren i built for a few friends, based around the amdek PCK-100 and the DS7. resettable LFO, Tri/Sqr wave VCO, decay envelope generator and VCA. i used the other half of the lm13700 to use as a voltage control for the VCO instead of it going to waste. the strip board version worked a treat so i'm keen to finish this to see how it holds up!
That looks splendid ! I'm at the moment trying to expand my ol'DS7 (adding sq. wave, filter w/ CV/LFO/EG, additional EG, routable audio modulation, tri/sq. LFO ao) but I'm definitely in another league :
Finished Scott Bernardi's VC Delay circuit. So much fun so far!
Coooool artwork. How do you label the panel? _________________ --
How may I be of disservice?
---
Music for conscious listening @ http://www.fmdelight.de/
Finished Scott Bernardi's VC Delay circuit. So much fun so far!
Coooool artwork. How do you label the panel?
Thanks! That's my dog Boris in the picture. I actually used the same toner transfer method that I use to etch circuit boards and panels. I just printed out the reverse image from a laser printer on to a piece of magazine paper. Then ironed it on the piece of sanded smooth aluminum. Threw on a couple layers of clear coat and it turned out pretty well. Not as deep of black as I wanted but I like it. _________________ http://www.youtube.com/user/borisandfef
its an analogue dub siren i built for a few friends, based around the amdek PCK-100 and the DS7. resettable LFO, Tri/Sqr wave VCO, decay envelope generator and VCA. i used the other half of the lm13700 to use as a voltage control for the VCO instead of it going to waste. the strip board version worked a treat so i'm keen to finish this to see how it holds up!
That looks splendid ! I'm at the moment trying to expand my ol'DS7 (adding sq. wave, filter w/ CV/LFO/EG, additional EG, routable audio modulation, tri/sq. LFO ao) but I'm definitely in another league :
(but it works !)
thank you!! but we all start somewhere! i'm just a bit of a nerd who likes to design stuff, and your mods are easily accomplishable with the DS7. i just looked at your thread and reckon my changes would work pretty well for what you need for the envelope trigger section. i'll finish this prototype board and if it all works how the strip board did then i'll post the schematic for any one who wants it. everything i've learnt has been from here, and all the other synth freaks who are decent enough to share their work so i'm more than happy to do the same!
the gate to trigger circuit works nicely but the lfo reset might get a few questionable looks from folk... however it does what i want! with a few component changes and jumpers it'll make a nice drum module as well.
should hopefully be done by the end of the week if i get time away from decorating the house and all the other things life throws in the way!
Hello , here are some sounds from these great circuits from Ian Fritz, i use the 5Pulser alot in my recent music & the chaos sometimes for unusual lfo type modulations.
Dave.
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Okay, high time I unveiled the project that has been keeping me occupied for the last 18 months - behold The Mightier Mirlitzer (I prematurely named my Sound Lab 'The Mighty Mirlitzer' and now have to go one better):
Impressive synth you have there , good work & nice and colorful .
Do you use lots of multiples or did you build mini mixers into the designs ??
i'll finish this prototype board and if it all works how the strip board did then i'll post the schematic for any one who wants it. everything i've learnt has been from here, and all the other synth freaks who are decent enough to share their work so i'm more than happy to do the same!
the gate to trigger circuit works nicely but the lfo reset might get a few questionable looks from folk... however it does what i want! with a few component changes and jumpers it'll make a nice drum module as well.
Well THAT IS COOL.
Quote:
should hopefully be done by the end of the week if i get time away from decorating the house and all the other things life throws in the way!
...all you hear is 808. The tones are from self-oscillating congas.
mods:
- white noise level
- snare decay
- snare filter
- clap offset
- clap reverb amount
- maraca filter
- rimshot filter
- cowbell tuning x2
- open hat filter
- closed hat filter
- white & pink noise input jacks (not used in this demo)
- schmitt trigger input jacks (not used in this demo)
- self-oscillation of congas when the decay is set all the way _________________ Sneak-Thief - raw electrofunk
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