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synthesizer trio
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uuuuu



Joined: Nov 24, 2012
Posts: 13
Location: Switzerland, Europe

PostPosted: Sat Nov 24, 2012 12:50 pm    Post subject: synthesizer trio
Subject description: :)
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Hello
synth trio designation

Last edited by uuuuu on Wed Mar 06, 2013 7:14 pm; edited 1 time in total
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uuuuu



Joined: Nov 24, 2012
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Location: Switzerland, Europe

PostPosted: Sat Nov 24, 2012 1:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

xxx
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uuuuu



Joined: Nov 24, 2012
Posts: 13
Location: Switzerland, Europe

PostPosted: Sat Nov 24, 2012 1:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

iiii
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Cynosure
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PostPosted: Sat Nov 24, 2012 2:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

The cost of posts and knobs can often be worth that much alone, but if you find some cheap pots and skip the knobs then you might be able to put something together in that price range.

Have a look in the Lunetta thread for some ideas. You should be able to do a baby 4 with a simple filter and 7555 EG for that much.
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uuuuu



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PostPosted: Sat Nov 24, 2012 2:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

kkk
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Cynosure
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PostPosted: Sat Nov 24, 2012 2:42 pm    Post subject: Reply with quote  Mark this post and the followings unread

Baby 10 (limit it to less steps if you can't afford all the pots):

http://i210.photobucket.com/albums/bb292/frequencycentral/baby10.jpg



7555 EG that runs off a +5V supply:

http://www.jacobwatters.com/images/synth/ad_7555_jovianpyx.gif



Some simple active filters for the EG to control. Use one that has a CV input:

http://electro-music.com/forum/topic-43897.html



I think you could fit the EG buffer and invertor and the filter all on one LM324.
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uuuuu



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PostPosted: Sat Nov 24, 2012 2:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

TTTTTTTTTTT
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Cynosure
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PostPosted: Sat Nov 24, 2012 8:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

haney wrote:
the greatest human being to ever live!! this guy!!!!

Possibly Very Happy

haney wrote:
U have a band out there????

No band. I just play with myself Laughing

haney wrote:
give me a full working schematic for 10 dollars paypal

I would have to breadboard it and test it out, and I don't have time for that right now.

haney wrote:
no thinking required.

Learning this stuff is half the fun. Then next time you can figure it out on your own, and pretty soon be giving schematics to other noobs here in the forums.
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-minus-



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PostPosted: Sat Nov 24, 2012 8:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here's my suggestion. It's going to be hard to do for $20-$40. I'd be making one of these:

http://www.musicfromouterspace.com/forums.html?CATPARTNO=ALIENSCREAMERKITANDPANEL&PROJARG=ALIENSCREAMER%2FALIENSCREAMER.php&MAINTAB=CATALOG&VPW=1261&VPH=761

Ok, so it's $70... and you will need a soldering iron and solder too, but it looks like it comes with everything you need, even a panel. At least you know all the parts are there, and the circuit will work.
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uuuuu



Joined: Nov 24, 2012
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PostPosted: Sun Nov 25, 2012 12:45 am    Post subject: Reply with quote  Mark this post and the followings unread

sssssssssssss
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uuuuu



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PostPosted: Sun Nov 25, 2012 1:36 am    Post subject: Reply with quote  Mark this post and the followings unread

xxxxx
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-minus-



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PostPosted: Sun Nov 25, 2012 1:53 am    Post subject: Reply with quote  Mark this post and the followings unread

haney wrote:
I have an emergency that i need it


Laughing I know the feeling. I've had alarm bells ringing here for 4 years and I still haven't finished the synth I want/need!

I'm not sure what you define as a 'synth'. There are plenty of little noise makers out there you could make. The budget is the problem. You aren't going to get much in terms of a full synth with that. I'd be looking at an Atari Punk Console or a square wave drone machine. The expensive part is hardware. Potentiometers, switches, sockets etc. You say you want to plug it into an amplifier, so there goes 1 socket. You need a battery clip. That would be around a tenth of your budget gone already. Potentiometers cost money. You can't really have more than say four or five with your budget. Then there's some kind of board to build it on. IC's, resistors, capacitors etc. And an enclosure of some sort.

I'd be looking in the Lunetta forum. You could probably make some simple noise maker out of a couple of IC's and some passives. have a look around there.

Perhaps there is a magic chip somewhere to give you a fully fledged synth. I haven't found it yet! Laughing
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uuuuu



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PostPosted: Sun Nov 25, 2012 1:57 am    Post subject: Reply with quote  Mark this post and the followings unread

YYYY
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elmegil



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PostPosted: Sun Nov 25, 2012 2:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Perhaps there is a magic chip somewhere to give you a fully fledged synth. I haven't found it yet!


Closest I've seen are the CEM chips, and they'll blow the hell out of that budget by themselves, well before you get to all the physical stuff you were pointing out.
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syntherjack



Joined: Oct 29, 2012
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PostPosted: Sun Nov 25, 2012 3:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hallo,

try WP-20 synth. Not very popular, a little outdated, but really fun to tweak. I build it much below 20$ (using chinese pots, but still below 20$). You can find some demo on youtube.

Jack
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RF



Joined: Mar 23, 2007
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PostPosted: Sun Nov 25, 2012 4:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here's something to try. Although results are varied from others who have built it.
It's not 1 volt per octave. Wink and is a bit unruly.

You need a CV and Gate/trigger source to get any sound from it.
Repeat
You need a CV and Gate/trigger source to get any sound from it.
Sequencer...CV Keyboard or other CV/Gate or Trigger source.
Here it is using a baby 10 sequencer with a trigger mod.

http://www.youtube.com/watch?feature=player_embedded&v=Z-ZdbbtVmAM

Good luck

bruce[/url]


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elmegil



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PostPosted: Sun Nov 25, 2012 6:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

The WP-20 looks pretty interesting; that's basically an even more simplified version of the same idea as the Soundlab, which I've been building lately.
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RotomotioN



Joined: Mar 02, 2013
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Location: Netherlands

PostPosted: Wed Mar 06, 2013 4:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

I can spot a couple of omissions in that schematic.
First: VR2 appears to be a normal fixed resistor, it should probably be wired like VR1.
Second: no mentioning what IC's were used, which makes it impossible to build.
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elmegil



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PostPosted: Wed Mar 06, 2013 5:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

My guess for the chips is a standard op amp (TL07X) and a hex inverter, probably one of the schmitt trigger ones, so a CD40106.
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analog_backlash



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PostPosted: Wed Mar 06, 2013 6:38 pm    Post subject: Reply with quote  Mark this post and the followings unread

Also:

(1) You should connect unused inverter pins to 0V (5 and 9 in this case).

(2) The op-amp pins suggest that a dual op-amp has been used (e.g. a TL072). If you use this, I would connect the spare op-amp up with the inverting input connected to the output (pins 6 and 7) and the non-inverting input to the junction on R13, R14 and C12 (pin 5 - this is at half the supply voltage). Alternatively, If you don't want a wasted op-amp, you could use a single op-amp (e,g, TL071) - pins 2, 3 and 4 as per diagram, pin 7 to positive (not pin 8 ) and pin 6 as the output (not pin 1).

Gary
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elmegil



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PostPosted: Wed Mar 06, 2013 7:43 pm    Post subject: Reply with quote  Mark this post and the followings unread

Looking at this again that fixed resistor may be deliberate as well, since that's the control voltage side. Not clear whether the mistake is omitting the rheostat bits of a pot or naming the resistor incorrectly. I haven't build this circuit so I can't say for sure....
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analog_backlash



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PostPosted: Thu Mar 07, 2013 3:30 am    Post subject: haney Reply with quote  Mark this post and the followings unread

BTW, I think uuuuu = haney and he (she?) has been playing silly buggers (as we English say). It doesn't matter really - he (she) can only screw up their own postings...
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Blue Hell
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PostPosted: Thu Mar 07, 2013 4:21 am    Post subject: Reply with quote  Mark this post and the followings unread

hmm .. uuuuu felt lonely? Shocked
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richardc64



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PostPosted: Thu Mar 07, 2013 6:41 am    Post subject: Reply with quote  Mark this post and the followings unread

CV In controls the frequency of both oscillators thru "starvation." A "master pitch", if you will. VR1 makes the second oscillator variable for harmony, beating and general weirdness.
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analog_backlash



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PostPosted: Thu Mar 07, 2013 3:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

richardc64 wrote:
CV In controls the frequency of both oscillators thru "starvation." A "master pitch", if you will. VR1 makes the second oscillator variable for harmony, beating and general weirdness.


Sounds perfectly logical (Spock) to me. I must admit, I hadn't noticed the starvation CV control until you pointed it out Rolling Eyes I must pay more attention in future...

Gary
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