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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
The grind is over....
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CHRISKELLY



Joined: Apr 08, 2018
Posts: 96
Location: England
Audio files: 3

PostPosted: Mon Mar 18, 2019 2:29 pm    Post subject: The grind is over....
Subject description: Finally finished my first project
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I recently finished my first electro music project. It's taken about 10 months altogether. Mainly due to the fact it started off as a baby 8 sequencer and grew organically into something more complicated. And also I had to learn everything from scratch!

Not strictly lunetta but since you guys helped me so much I wanted to share it with you and say thanks Very Happy.

Quick run down of it:

- Runs on 9V supply
- Atari Punk Console based, but with the astable oscillator driving 2 monostable oscillators (so they are 'in tune' with each other and can run through the same stepped tones)
- the first pair of 555's is the classic APC with a baby 16 sequencer which is the 'LEAD' sound. Can be full or half steps
- the 2nd pairing is sent via a 4040 to create sub octaves and becomes the 'BASS' and 'CHORDS'
- the BASS uses 4046 pll's to create the 5th and Octave notes by freq multiplying the root note
- the CHORDS use 4046's in the same way to create the 3rd (both major and minor) the 5th and the 4th or 6th notes (selectable)
- BASS has a 4017 sequencer with 3 to 8 steps. Steps can be root note or 5th/Octave or off, chosen by centre off on/off/on toggle switches
- CHORD notes can be played sustained, or in an arpeggio. I came up with 3 sequences using a 4017, a 4015 or a 4040. Can be played forwards or backwards, and you can mix and match the type for each of the 4 notes.
- 4 main clock speeds, using 4017's to sub divide.
- LEAD and BASS both have Ring Mods using 4070's
- LEAD has a 4046 pll for octave selection. I also added pots to vary the resistances on pins 11 and 12. One slows down the time to lock onto the CV change which sounds like a kind of portamento. The other creates a kind of wobble as the pll can't quite lock on.
Basically a poor man's vibrato Laughing

- BASS and CHORDS have a 'vibe' mode which was from Run off the groove's Trivibe guitar pedal circuit
- LPF/HPF using Tim Escobedo's ms20 clone
- Delay circuit (another guitar pedal circuit)
- LFO for the filter, with rates either in sync with the clock or free
- a few more features but nothing too interesting, and I'm getting bored of typing Wink

Anyway here's a quick video of it. Sorry for the poor audio and the camera work is straight off of the film Cloverfield. Also its a bit of an amateur demonstration but you get the idea. Also there's a few more pot knobs to attach still.

https://youtu.be/-agakEa1epw

Cheers guys
Chris
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Steveg



Joined: Apr 23, 2015
Posts: 109
Location: Perth, Australia

PostPosted: Mon Mar 18, 2019 3:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow, there is so much going on! A real professional looking and sounding tour de force.
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PHOBoS



Joined: Jan 14, 2010
Posts: 4536
Location: Moon Base
Audio files: 633

PostPosted: Mon Mar 18, 2019 6:56 pm    Post subject: Re: The grind is over....
Subject description: Finally finished my first project
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wow! well-done
looks and sounds great! I like that you went for switches instead of making it patchable. Although it might limit the available options a bit
it's easier to play with and you don't have to dig through a wire spaghetti. Also those chord buttons seem to work very well, I really
should look into using the PLL more.

CHRISKELLY wrote:
- Atari Punk Console based, but with the astable oscillator driving 2 monostable oscillators (so they are 'in tune' with each other and can run through the same stepped tones)
oh nice idea, I still have an APC build on my todo list so I might incorporate that.
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stolenfat



Joined: Apr 17, 2008
Posts: 476
Location: Sunny Oakland California
Audio files: 1

PostPosted: Mon Mar 18, 2019 9:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

sooooo coooool!
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CHRISKELLY



Joined: Apr 08, 2018
Posts: 96
Location: England
Audio files: 3

PostPosted: Tue Mar 19, 2019 2:32 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the positive feedback guys Very Happy

In my head I wanted it to be like a groovebox that could just be played on the fly - hence all the switches instead of patch cables.

It definitely limits it though. I think if i re-built it I'd try and incorporate some banana jacks. I'm going to trawl through this forum to get some ideas!
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Top Top



Joined: Feb 02, 2010
Posts: 249
Location: California

PostPosted: Thu Mar 21, 2019 4:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

Really nice!
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Blue Hell
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Joined: Apr 03, 2004
Posts: 22852
Location: The Netherlands, Enschede
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G2 patch files: 319

PostPosted: Fri Mar 22, 2019 1:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hey, this is very nice Cool
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Jan
also .. could someone please turn down the thermostat a bit.
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RingMad



Joined: Jan 15, 2011
Posts: 384
Location: Montreal, Canada
Audio files: 3

PostPosted: Fri Mar 22, 2019 2:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

Very impressive build and looks/sounds fun to play!

I love the eyes-as-tempo-indicators.

I think I would forget what a lot of switches do if I put it aside for a bit. But I have a crap memory so tend to put labels on my boxes.

.:james:.
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CHRISKELLY



Joined: Apr 08, 2018
Posts: 96
Location: England
Audio files: 3

PostPosted: Fri Mar 22, 2019 5:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks fellas Very Happy

James - I agree with you about the labels, I definitely need to add them at some point.

The LED indicators worked great originally but now one of them is constantly on! I designed it so that when audio passed through the "vibe"/modulation circuit, it also closed a 4066 switch via an NPN transistor and allowed the indicator CV to pass through and activate the LED's. I think in the struggle to close the lid on the box something must have shorted and the switch is always closed. There were so many wires in there it was like trying to pack a suitcase Laughing
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donpachi



Joined: Jul 16, 2009
Posts: 81
Location: Marburg
Audio files: 2

PostPosted: Fri Mar 22, 2019 11:52 pm    Post subject:   Reply with quote  Mark this post and the followings unread

Great awesome stuff Cool
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brock



Joined: May 26, 2011
Posts: 112
Location: Canada

PostPosted: Sun Mar 31, 2019 11:06 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice work Chris. Sounds great, looks great. I really like the chromatic chord and bass stuff.
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Harry



Joined: May 09, 2017
Posts: 20
Location: Texas

PostPosted: Sun May 05, 2019 1:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cool build. I too like the switches instead of patch cable approach. I vote for no labels!
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droffset



Joined: Feb 02, 2009
Posts: 508
Location: London area
Audio files: 2

PostPosted: Wed May 22, 2019 12:36 am    Post subject: Reply with quote  Mark this post and the followings unread

Very cool, great build!
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Check out the FREE Intro to Lunettas Document
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