Joined: Feb 28, 2008 Posts: 161 Location: chicago
Audio files: 9
Posted: Wed Jun 25, 2008 12:56 am Post subject:
lunetta sound samples
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...
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.
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 ??
Joined: Feb 28, 2008 Posts: 161 Location: chicago
Audio files: 9
Posted: Wed Jun 25, 2008 7:52 am Post subject:
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
Joined: Feb 28, 2008 Posts: 161 Location: chicago
Audio files: 9
Posted: Wed Jun 25, 2008 8:14 am Post subject:
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)
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!
Joined: Feb 28, 2008 Posts: 161 Location: chicago
Audio files: 9
Posted: Fri Jun 27, 2008 12:47 pm Post subject:
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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Joined: Mar 23, 2007 Posts: 1502 Location: Northern Minnesota, USA
Audio files: 28
Posted: Wed Jul 30, 2008 8:52 pm Post subject:
Alligator clips from the Lunetta into the computer -
(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.
Joined: Mar 23, 2007 Posts: 1502 Location: Northern Minnesota, USA
Audio files: 28
Posted: Sat Aug 02, 2008 10:45 pm Post subject:
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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Joined: Mar 23, 2007 Posts: 1502 Location: Northern Minnesota, USA
Audio files: 28
Posted: Sun Aug 03, 2008 2:14 pm Post subject:
Free Jazz Lunetta
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?
erm .. I do actually 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
Joined: Mar 23, 2007 Posts: 1502 Location: Northern Minnesota, USA
Audio files: 28
Posted: Sun Aug 03, 2008 5:12 pm Post subject:
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.
that last one was great yea you dont want to hear my samples
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!!
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. _________________ --Howard
my music and other stuff
Joined: Mar 23, 2007 Posts: 1502 Location: Northern Minnesota, USA
Audio files: 28
Posted: Wed Aug 06, 2008 2:29 pm Post subject:
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 Pull it out and fire it up!
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. 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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