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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Sinister Tone Generator
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rich decibels



Joined: Apr 01, 2010
Posts: 60
Location: Wellington, NZ
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PostPosted: Wed Jun 01, 2011 3:49 am    Post subject: Sinister Tone Generator
Subject description: Bass drone synth
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Hello people I made a little drone synth. It is not especially clever and maybe not the first time someone's thought of this set-up but it is especially fun to play and nice to look at. This specific one that I built is for sale, with all proceeds going to a good cause. Further details are up on my site. Please enjoy.

Posted Image, might have been reduced in size. Click Image to view fullscreen.
Posted Image, might have been reduced in size. Click Image to view fullscreen.

Here's a sample, with reverb and filtering added from 1:18


Update: Schematic updated as per richardc64's suggestion below

Last edited by rich decibels on Tue Jun 07, 2011 3:33 am; edited 1 time in total
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RF



Joined: Mar 23, 2007
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PostPosted: Wed Jun 01, 2011 4:09 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice job - very nice packaging and good sounds...

bruce

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tjookum



Joined: May 25, 2010
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PostPosted: Wed Jun 01, 2011 6:42 am    Post subject: Reply with quote  Mark this post and the followings unread

excellent work and very clever usage of all of the 6 inverters. I really like how you paired them together with those little 10k seperation pots, I don't think I've seen that before and it sounds fantastic.

What kind of good cause are you supporting?

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Psyingo



Joined: Jun 11, 2009
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PostPosted: Wed Jun 01, 2011 8:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

fine tune is realy good for drons
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richardc64



Joined: Jun 01, 2006
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PostPosted: Thu Jun 02, 2011 7:23 am    Post subject: Re: Sinister Tone Generator
Subject description: Bass drone synth
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rich decibels wrote:
It is not especially clever...


I don't know about that. Having oscillators track while maintaining an offset ("separation") seems pretty clever to me. That center off switch might cause problems, though. Shorting either output directly to ground doesn't seem like a good idea.

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rich decibels



Joined: Apr 01, 2010
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PostPosted: Thu Jun 02, 2011 9:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for your comments esteemed brethren! Any ideas for a better way of switching one or the other voice off without grounding the output? I guess if I ground the inputs of inverters C and D instead of the outputs that should still work, right?
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richardc64



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PostPosted: Fri Jun 03, 2011 3:30 am    Post subject: Reply with quote  Mark this post and the followings unread

rich decibels wrote:
Any ideas for a better way of switching one or the other voice off without grounding the output? I guess if I ground the inputs of inverters C and D instead of the outputs that should still work, right?


That would then be grounding the oscillators' outputs. (Thru the diodes.) Instead of grounding the Inputs of C or D, wire the switch to +V so it makes C or D In logic 1. That will disable the diode ORing and hold C or D Out at logic 0; the same effect as grounding either output was having, but without the excessive, possibly damaging, current flow.

Nice, compact package, btw.

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v-un-v
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PostPosted: Fri Jun 03, 2011 4:04 am    Post subject: Reply with quote  Mark this post and the followings unread

Rich, Would you be so kind as to show us your veroboard design layout too? Smile
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rich decibels



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PostPosted: Fri Jun 03, 2011 4:12 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks c64, I'll give it a go.

v-un-v my layout is something fairly similar to this: http://www.flickr.com/photos/rdbartlett/5785949516
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v-un-v
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PostPosted: Fri Jun 03, 2011 4:14 am    Post subject: Reply with quote  Mark this post and the followings unread

super-cool! Thx! Very Happy
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DAS KOMPUTERMASCHINE IST NICHT FÜR DER GEFINGERPOKEN UND MITTENGRABEN! ODERWISE IST EASY TO SCHNAPPEN DER SPRINGENWERK, BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKSEN.
IST NICHT FÜR GEWERKEN BEI DUMMKOPFEN. DER RUBBERNECKEN SIGHTSEEREN KEEPEN DAS COTTONPICKEN HÄNDER IN DAS POCKETS MUSS.
ZO RELAXEN UND WATSCHEN DER BLINKENLICHTEN.
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rich decibels



Joined: Apr 01, 2010
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Location: Wellington, NZ
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PostPosted: Wed Jun 29, 2011 2:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

fyi I've recorded a new demo of this unit running through a WSG filter with shitty LFO (deets about that at my site)

Sinister Tone Generator thru WSG LPF and junky LFO by Rich Decibels
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donpachi



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PostPosted: Wed Aug 03, 2011 2:46 am    Post subject: Reply with quote  Mark this post and the followings unread

I built this (standard four-knob version without filters). It is most excellent and totally awesome. It does my favorite WSG sounds in a smaller package and from a quick afternoon build. Sounds great through a guitar amp with reverb, but I'll try different filters soon.

Do not hesitate to order the dual pots for this!
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Stream Operator


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PostPosted: Thu Aug 04, 2011 11:38 am    Post subject: Reply with quote  Mark this post and the followings unread

rich decibels, did you sell it yet and at what price? I'd like to get into making boxes like this and would like to know what people pay for them.

Les

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rich decibels



Joined: Apr 01, 2010
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PostPosted: Sun Aug 07, 2011 3:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi Les

This unit sold at auction for $120 (NZD). Too cheap in my opinion, but I'm not sore because the money was for charity. I have had better experience selling my stuff as art objects as opposed to off-the-shelf products, I recommend that approach to everyone. Unless of course you've just designed the Next Big Thing and you can mass produce it for $10 a piece, there's just no point targeting the consumer market.

Make sense?
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Stream Operator


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PostPosted: Sun Aug 07, 2011 6:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow, that's a really good price actually. I see what you mean about the art object concept - huh, I'll have to give that some thought.

Les

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rich decibels



Joined: Apr 01, 2010
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PostPosted: Wed Aug 10, 2011 10:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hey Les I just finished writing a tutorial on how I make my laser-cut electronics enclosures like this one, thought you might be interested.

It covers the process from circuit design and layout, to parts + controls placement, to laser-cut construction techniques, including a few tricky things like allowing for kerf and dog-boning your internal corners to prevent cracking.

Hope it is of some use to you Smile
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SPIKE the Percussionist



Joined: Jun 06, 2006
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PostPosted: Wed Aug 10, 2011 11:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hey Rich...

That noiz toy sounds really neat!

if you decide to make more please let me know.

i would like to get one!

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Stream Operator


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PostPosted: Thu Aug 11, 2011 3:43 am    Post subject: Reply with quote  Mark this post and the followings unread

rich, my compliments on your enclosure technique, it's very well developed. I like how the dog bone cutout serves to relieve the stress of the fastener, and also fits the fastener.

You know what occurs to me is that you could make other non-rectangular shapes of box this way. You could even make lego-style U-shaped boxes or consoles of some sort. I guess now that you've mastered this technique, the rest is limited only by your imagination!

Les

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jeanpat



Joined: Jan 15, 2018
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PostPosted: Sun Feb 25, 2018 7:22 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi!
I made a sinister tone augmented. The start was Rich design, I change the range of two oscillators, add a mixer to get more balance when both side are on. I also add a three shapes LFO on each side (borrow from mfos). Si here it is.

https://youtu.be/V8MI5q4ddZk


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rich decibels



Joined: Apr 01, 2010
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PostPosted: Sun Feb 25, 2018 3:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

jeanpat thanks so much for sharing! I am so impressed with what you've built, you made my day Smile
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