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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
lunetta sound samples
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jnuaury



Joined: Feb 28, 2008
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PostPosted: Wed Jun 25, 2008 12:56 am    Post subject: lunetta sound samples Reply with quote  Mark this post and the followings unread

i noticed a lack of sounds in this forum....

the following lunetta clips maybe be a little different than the "traditional" lunetta. both clips feature a simple 40106 oscillator as the sound source but the 40106 has a CV input

the CV input is actually connected to the +V pin so the chip actually uses the CV input to power the IC



the first clip involves ZERO knob twiddling its just a handful of oscillators (from a separate chip) powering the 40106



the second clip is a hardwired lunetta patch which functions as a sequencer
besides the 40106 clocking oscillators there no are components on the board beyond the ICs

im running a clock into a 4040 divider to clock into a 4051
theres a rotary switch to select what divisions clock the 4051
the first selection though instead of having divisions of the first osc has 2 extra oscillators patched in to make unsteady rhythms and patterns

the 4051 routes 8 voltage dividers into the common which is a CV out
im running my lunetta stuff off 5 volts so i can try to keep the signals under that range if i plug them into external modules

the sequecer clip runs through the modes in order...

1) three clocks

osc 1 divided by...
2) /1, /2, /4
3) /1, /4, /8
4) /1, /4, /16
5) /1, /2, /8
6) /1, /2, /16


I think that covers things for now....


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Uncle Krunkus
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PostPosted: Wed Jun 25, 2008 1:48 am    Post subject: Reply with quote  Mark this post and the followings unread

Cool!
Nice to hear some square waves! Very Happy

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jnuaury



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PostPosted: Wed Jun 25, 2008 2:06 am    Post subject: Reply with quote  Mark this post and the followings unread

well yes you do normally get square waves...
but with that "CV" input i mentioned you can sneak some curves out of those chips

here is some scope shots of...
the shot that has the peak and then valley has the scope locked on to one cycle - it was a repeating waveform


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loss1234



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PostPosted: Wed Jun 25, 2008 5:59 am    Post subject: Reply with quote  Mark this post and the followings unread

wow

can you explain a little more about how you are using cv with the 40106.

if i understand correctly, you are NOT giving the pin 14 of the chip any power except for a cv input (is this tied to ground like a normal jack?)

so when you put cv in to this jack, is that the only power the 40106 gets? does it control it like a starve pot instead of a regular pitch CV?

the more information the better and thanks so much for taking the time to do t his.

i am sifting through recordings i did this weekend trying to find something to post as well.

i will definitely study your notes


WE SHOULD HAVE A LUNETTA PATCH THREAD where people explain how they connect the chips to get cool sounds.

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loss1234



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PostPosted: Wed Jun 25, 2008 6:01 am    Post subject: Reply with quote  Mark this post and the followings unread

also i know i have asked before but how can we turn squarewaves into other waves? is there a lunetta waveshaper...not so much changing the duty cycle (which i dont really understand either) but turning these waves into saw or tri or sine.

thanks

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loss1234



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PostPosted: Wed Jun 25, 2008 6:02 am    Post subject: Reply with quote  Mark this post and the followings unread

i keep listening to these over and over. great stuff.

i am thinking about trying to add vactrol cv

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loss1234



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PostPosted: Wed Jun 25, 2008 7:24 am    Post subject: Reply with quote  Mark this post and the followings unread

a few things in your explanation confuse me

1. "the 4051 routes 8 voltage dividers into the common which is a cv out"

ok, what are you using for voltage dividers? pots? and are these then being summed together? or R2R'ed together? you are making a common cv out with these but in your samples, what did you connect the cv to? your 40106 +v ??

thanks

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jnuaury



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PostPosted: Wed Jun 25, 2008 7:40 am    Post subject: Reply with quote  Mark this post and the followings unread

loss1234 wrote:

so when you put cv in to this jack, is that the only power the 40106 gets? does it control it like a starve pot instead of a regular pitch CV?


yes! thats it, there is no power going to the chip at all
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jnuaury



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PostPosted: Wed Jun 25, 2008 7:52 am    Post subject: Reply with quote  Mark this post and the followings unread

loss1234 wrote:
also i know i have asked before but how can we turn squarewaves into other waves? is there a lunetta waveshaper...not so much changing the duty cycle (which i dont really understand either) but turning these waves into saw or tri or sine.

thanks


"starve" functions whether its a pot or the cv as power method can both make cmos chips act funny enough not to be perfect square waves but at the same time they wont serve their intended purposes exactly but act a little wonky instead

its a trade-off im willing to make


and as for real waveshaping... square waves really have no timing information - a 0-5 volt saw encounters every voltage between 0-5 only once in each cycle... a 0-5 pulse hits 0 and 5 once but doesnt encounter the inbetween voltages so theres no way to know how far you are within the cycle

with that said theres always ways to get round things


http://www.robthefiddler.com/electronics-audio-diy/circuit-experiments/big-johnson-signal-generator/
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jnuaury



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PostPosted: Wed Jun 25, 2008 8:14 am    Post subject: Reply with quote  Mark this post and the followings unread

loss1234 wrote:
a few things in your explanation confuse me

1. "the 4051 routes 8 voltage dividers into the common which is a cv out"

ok, what are you using for voltage dividers? pots? and are these then being summed together? or R2R'ed together? you are making a common cv out with these but in your samples, what did you connect the cv to? your 40106 +v ??

thanks


ok the setup is fairly similar to the baby10 schematic but i think its much more fun while being just as easy

first the 4051 is essentially a switch that toggles one connection between 8 options what makes it fun is that it receives a 3-bit binary number to know what option to connect to

a 3-bit binary number is 3 square waves
so if all of the square waves are low then you are at the first step and when all are high you are on the last step and with some high some low you get inbetweens

so it selects the options like this (zero would be the first step and seven would be the last step)

0 0 0 = 0
0 0 1 = 1
0 1 0 = 2
0 1 1 = 3
1 0 0 = 4
1 0 1 = 5
1 1 0 = 6
1 1 1 = 7


and sorry if things get confusing but they are actually wired a little different than i thought....

so i have 5 volts wired to the connection that gets switched between 8 channels

i have the output of each channel wired to the right leg of different 100k pots

the left leg of each pot is tied to ground and the middle leg of all pots are then tied together via diodes to what becomes the CV out



ill try to draw a diagram later
its really more simple than it may seem
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loss1234



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PostPosted: Wed Jun 25, 2008 9:41 am    Post subject: Reply with quote  Mark this post and the followings unread

ok, i tried doing it the way i THOUGHT you did.

40106 oscillators X 3.

into A B and C inputs of the 4051.

then, i took one oscillator and made it the clock for the 4040. i took a bunch of the 4040 outputs and stuck them into 4051 INPUTS 1-7. then i took the 8 in/out (pin 3 i think) and used that as the CV. BUT it would NOT power the 40106. So instead, i used a vactrol and put that into pin 1 and 2 of the new 40106 with a 224 cap to gnd.

very cool.

very metallic sounding. different than yours. i think more noise like. (my scope had a hard time finding a waveform it could grab on to)

so, i think you are saying that instead, yours had a pot on each input to the 4051? so actually, you were using all 8 as outputs? and you dioded them together and stuck that into pin 8 of another 40106?

sounds cool.

also, i tried plugging the cv out of mine into my cgs vco. good sounds there as well.

very interesting.


i am going to have to really start using the 4050/51/and 52 more often!


thanks

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loss1234



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PostPosted: Thu Jun 26, 2008 5:51 am    Post subject: FIRST EVER SCHEMATIC Reply with quote  Mark this post and the followings unread

ok here is my first schematic ever

it looks terrible and i had to make my own 40106 object so ignore the pin numbers.

now i tried all kinds of combinations of ouputs from the 4040 to the 4051, so really, some rotary switches are in order but i figured that was obvious




anyway, please let me know how this is different from your circuit jnuary

thanks


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jnuaury



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PostPosted: Fri Jun 27, 2008 12:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

ok if anyone has a link to free schematic software for mac, please send it my way


a few notes about the diagram...

i left out power and ground connections

the circles on the right side are of course pots and connected as if viewed from the back


the cv output will be a range from zero to whatever value you are using for power - i used a 5 volt supply this time so the cv out is 0-5 volts


the 3 clock inputs A, B, and C can be any lunetta signal

itd be best to run your other lunetta chips off the same supply voltage
but the CV out can of course go to normal synth modules running on their own supply


if you want this to function as a normal sequencer run an oscillator into A and run a division of 2 into B and division of 4 into C

getting creative with different divisions will give you different repeating patterns

running the oscillator into A and a division by 2 into B and a division by 8 into C will repeat the first 4 steps twice and then repeat the second 4 steps twice (1234-1234-5678-5678)


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RF



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PostPosted: Wed Jul 30, 2008 8:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

Alligator clips from the Lunetta into the computer - Embarassed
(Think of the 60 cycle hum as 'value added' audio character)

This was recorded in one pass, and the only changes I made were flipping a couple toggle switches on the oscillators. Just a touch of reverb added. The 40106 is being starved.

Three chips - 40106 for oscillators, 4015 4 Bit Shift Register, 4094 8 bit Shift Register.

bruce


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jnuaury



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PostPosted: Wed Jul 30, 2008 9:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

RF wrote:
Alligator clips from the Lunetta into the computer


i used this same method!
and thanks for sharing your results!
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PostPosted: Sat Aug 02, 2008 9:09 am    Post subject: Reply with quote  Mark this post and the followings unread

RF wrote:
[...] This was recorded [...] Three chips [...]


Amazing diversity for so few chips and nice sample as well.

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PostPosted: Sat Aug 02, 2008 11:41 am    Post subject: Reply with quote  Mark this post and the followings unread

OMG, I missed this topic. Great sounds. This is fun music to listen too. Great stuff. Thanks.
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RF



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PostPosted: Sat Aug 02, 2008 10:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

I put together what I imagine is a more 'conventional' Lunetta patch - I'm trying to figure out just what the possibilities are with these circuits and these are really just first steps. I think I have enough modules to play a bit now. I'm really short of patch cords, though - and a bunch of those stacking plugs are pretty tempting.

Anyway - here's just a clip of the pictured patch. Halfway through the recording I moved one plug from the 4024 Clock Divider/Sub Oscillator from -6 octave to -7.

This patch uses the Bugs 40106 Osc's, 8 stage serial Shift Register, 4 stage Shift Register, 4024 clock divider, R/2R Ladder.

Perhaps not quite Lunetta like - I used a simple 555 VCO for the single oscilltor voice you hear.


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RF



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PostPosted: Sun Aug 03, 2008 2:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Free Jazz Lunetta Smile

Lunetta doing its thang - no manipulation of controls. It's been running like this for hours. Every now and then it will hold one note for a few minutes...then start back in again.

It's been a while since a circuit's operation made me laugh - I've been having a lot of fun with these.

Is anyone else have any samples of what they have been doing?

bruce


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PostPosted: Sun Aug 03, 2008 3:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

I don't want anyone's else samples Shocked

erm .. I do actually Embarassed I'd love to hear some more surprise machines in fact, but what I mean is that I very much like your experiments Bruce, I can hear, and almost see, your smile from here Laughing

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RF



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PostPosted: Sun Aug 03, 2008 5:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks, Jan

Each time I sit down with it for a few minutes something totally different comes out of it. Since I never heard a lunetta before, I wasn't sure what to expect, so each new patch is pretty entertaining to me.


bruce
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PostPosted: Mon Aug 04, 2008 6:19 am    Post subject: Reply with quote  Mark this post and the followings unread

that last one was great Very Happy yea you dont want to hear my samples Crying or Very sad
but over last week i decided i am revamping my current lunetta. taking it
out of the milkcrate and also going into a suitcase. i started the panel
design last friday. im hoping it to be a standalone synth and also a interface for my modular!!
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PostPosted: Wed Aug 06, 2008 11:05 am    Post subject: Reply with quote  Mark this post and the followings unread

RF wrote:
Each time I sit down with it for a few minutes something totally different comes out of it. Since I never heard a lunetta before, I wasn't sure what to expect, so each new patch is pretty entertaining to me.


Bruce. You've got it! It sounds just like the Lunettas we used to build in the 70s. Nothing wrong with the 555 oscillators. Great looking system you have in that case.

With complicated patches, you can get patterns that go for a long time and then suddenly change. It's a lot of fun.

Suggestions:

Make two patches that play "in stereo"

Add modulation with NAND gates or something.

That said, you have it now. I hope you can see why I'm still enthusiastic for these things after more than 30 years. It's got all the draw of bent instruments, but even more fun, IMHO.

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RF



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PostPosted: Wed Aug 06, 2008 2:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

mosc wrote:
I hope you can see why I'm still enthusiastic for these things after more than 30 years. It's got all the draw of bent instruments, but even more fun, IMHO.


Thanks for the input and suggestions mosc. It's been a really fun process.
I'm looking through my CMOS to see what I have that might be interesting to add.

It would be fun to hear something from your machine, mosc Smile Pull it out and fire it up!

bruce
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PostPosted: Thu Aug 07, 2008 9:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
It's been a while since a circuit's operation made me laugh - I've been having a lot of fun with these.

I just listened to that sample and couldn't help giggling to myself. Laughing That is one banana jacked fun dispenser you've got there sir. Sadly, mine is still on paper. (moving in a few weeks)
-justin
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