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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Noise! Noise! Noise!
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autowitch



Joined: Nov 19, 2011
Posts: 10
Location: Denver, CO

PostPosted: Mon Mar 18, 2013 1:49 pm    Post subject: Noise! Noise! Noise! Reply with quote  Mark this post and the followings unread

Just some fun with melody generators, shift registers, ring mod and pitch tracking. Sort of taking everything and throwing it together to see if something interesting happens. I probably should have cut the length down a bit...

https://soundcloud.com/autowitch/sausage-party (with too much reverb)



https://vimeo.com/62040867 (video - not enough reverb Smile )

Sausage Party from the autowitch on Vimeo.



Edit: I was trying for garbled and out of control.
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Draal



Joined: May 18, 2010
Posts: 305
Location: Oak Park, IL
Audio files: 5

PostPosted: Wed Mar 20, 2013 6:45 am    Post subject: Reply with quote  Mark this post and the followings unread

Super build there Cool .

That's alien abduction music in my book!

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analog_backlash



Joined: Sep 04, 2012
Posts: 391
Location: Aldershot, UK
Audio files: 21

PostPosted: Tue Mar 26, 2013 4:23 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Autowitch.

I've only just got round to listening/watching these posts (I had to be in a patient mood because, as you say, they are quite long!). Really like some of the sounds that you're getting. I'm building a lunetta at the moment (I will post very soon - I keep saying that).

Draal wrote:
Super build there Cool .

Ditto.

Just wondered which circuits you've used for pitch tracking (a 4046-based circuit?) and the shift registers. I have lots of schematics in my collection, but I'm not sure which ones to try.

Keep up the good work,

Gary
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autowitch



Joined: Nov 19, 2011
Posts: 10
Location: Denver, CO

PostPosted: Fri Mar 29, 2013 1:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hey Gary,

I'm looking forward to seeing what you are working on!



I used this thread for the pitch tracker. I used the 4049/4046 version (more specifically the breadboarded one in the middle of the thread).

http://electro-music.com/forum/topic-51275.html

The pitch tracker can vary pretty wildly depending on the manufacturer you use for the chips. I don't quite get the laser bloops that some people do, but I do get a nice texture of gurgles. I'm planning on building another one using a different source for the 4046 and seeing what happens.

I suspect that tweaking the caps will lead to some pretty dramatic changes in the behavior. (You must build a pitch tracker; I can't recommend it enough).



For the shift registers, I started with this:

http://electro-music.com/emsynth/PseudoRandom.html

I only have one bit hooked up. I wasn't sure how to seed the bits going into the shift register, so I added a push button going from hot to one of the legs of the XOR input. That effectively gives me a bit toggle that I can use to seed the shift register as it starts or to tweak it when it runs.

I think using an XNOR instead of an XOR may handle this problem on its own; but I've decided that I like the manual tweaking.

I made two outputs for the "random" bits. One is just like it's seen in the emSynth schematic. The other ANDs the bit with the clock; that would give a pulse output. This could be fun if combined with the drum circuits found here: http://electro-music.com/forum/topic-52786.html

The eventual plan is to create four of these using the various XOR connections in the emSynth version. That should provide a source for 4 bit random numbers that could be used for all sorts of things.



-aw
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RingMad



Joined: Jan 15, 2011
Posts: 232
Location: Montreal, Canada
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PostPosted: Sat Mar 30, 2013 6:19 am    Post subject: Reply with quote  Mark this post and the followings unread

autowitch wrote:
The eventual plan is to create four of these using the various XOR connections in the emSynth version. That should provide a source for 4 bit random numbers that could be used for all sorts of things.

If you are interested, there was some discussion of a few other 4-bit pseudo-random generators here: http://electro-music.com/forum/topic-52066.html

James.
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Dogenigt



Joined: Oct 25, 2009
Posts: 40
Location: Denmark
Audio files: 4

PostPosted: Mon Apr 01, 2013 9:42 am    Post subject: Reply with quote  Mark this post and the followings unread

autowitch wrote:


The pitch tracker can vary pretty wildly depending on the manufacturer you use for the chips. I don't quite get the laser bloops that some people do, but I do get a nice texture of gurgles. I'm planning on building another one using a different source for the 4046 and seeing what happens.


Hi aw, try unplugging your ground connection to your 4046, I did that with my CD4046BE and suddenly the lazer sweeps came on! very strange...!

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