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S/H => bitcrusher-style
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piedwagtail



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PostPosted: Tue May 09, 2006 8:29 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
The build quality is formidable....


not to read entirely straightforward,Uncle K Wink

nevertheless zipzaps buffer difficulties could be ironed out with one of those impedence analysers...0-15 Mhz should cover all....just a snip at $20,000,probably.
Wouldn't surprise me if they weren't a subsidary of Haliburton ,these days....

Robert
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elektro80
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PostPosted: Tue May 09, 2006 8:37 am    Post subject: Reply with quote  Mark this post and the followings unread

piedwagtail wrote:
Wouldn't surprise me if they weren't a subsidary of Haliburton ,these days....


Shocked

You mean, these Kerr devices come with an imprint of Cheney´s butt.

Shocked

I guess I would have preferred a Jesus bumper sticker.

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bugbrand



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PostPosted: Thu May 11, 2006 1:21 am    Post subject: Reply with quote  Mark this post and the followings unread

Sorry, still no updates on this circuit - I did breadboard the planned VCO part (based on Rene Schmitz 3phase LFO driver), but not fully tested..

(it does become harder to focus on work when the summer starts to approach...)

Anyone else got any good ideas for simple VC Osc control? I may try the Vactrols, but wondered if there's any other good ideas. If it can make use of a 40106 gate that'd be super!

The circuit idea now looks like this:
Rate Reducer Proto2 (EDIT -- note: this didn't work out!)

The main problem seems to be that -ve CVs don't really work out.. (hence the range knob is connected between +v and gnd rather than +v and -v in Rene's original design.. I'd like to be able to feed it with normal bipolar signals

I also connected R7 to +5v rather than v+ ----- that seems to be best??

Oh the confusion.
(highlights my sketchy electronic skills..)

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Last edited by bugbrand on Thu Sep 21, 2006 1:25 am; edited 1 time in total
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Uncle Krunkus
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PostPosted: Thu May 11, 2006 2:53 am    Post subject: Reply with quote  Mark this post and the followings unread

What did you draw that schem with Bug?
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bugbrand



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PostPosted: Thu May 11, 2006 9:52 am    Post subject: Reply with quote  Mark this post and the followings unread

YoYo - its done in Eagle (www.cadsoft.de) and screen grabbed.
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bugbrand



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PostPosted: Wed Jun 14, 2006 2:34 am    Post subject: Reply with quote  Mark this post and the followings unread

HeHe how the time flies (..bugs on the mind..)
Partly summertime I guess...
Well, finally I've gotten some great results from the Rate Reducer ideas.
I've now used an LM13700 for voltage controlled resistance driven by a log converter from a Ray Wilson VCA.

Here's the new schematic (if anyone wants an Eagle PCB layout then email me --- I've got it with the two pots on the board (I like doing it this way..!?!..)) - nice and compact little layout and working really well (well,actually, after a very silly mistake --- I'd prototyped it using Ray's Log/Lin converter so used a TL072 - when I built the new version yesterday I took the chips from the old prototype and completely forgot that I should now be using a TL071 - so I had a couple of hours of real head scratching --- DUH!)

Ok, so it uses an AN781 -- get a free sample from analog devices.
The choice of bits for the LM13700 VCResistor was a bit of trial and error - working around from the datasheet example I took the pair of resistors down from 100k to 4k7 - seems to work good now
There;s probably scope for improvement..

Comments etc would be great.!.

I'm happy now with this VC Resistor - it works well - none of the wierdy problems I had from -ve voltages when using DIY vactrols (..but that was probably due to my lack of real electronics knowledge..!..). I'm now going to re-do the simple varishape LFO scheme to make it simply voltage controllable. YES YES YES this opens up a load of possibilities.!.



Edit --- oh yeah, at full rate (with the 40106 osc running at highspeed) it does degrade the signal a bit (makes it noisy) -- I haven't yet measured the actual speeds its running at.. But I added a simple true-bypass switch around the module inputs.

Today I try to make this into a stomp pedal with modulation LFOs and volume pedal control input. DOPE-ASSED!

EDIT2 --- oh yeah, I'm totally naming this the BUG CRUSHER!

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bugbrand



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PostPosted: Wed Jun 14, 2006 3:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh, maybe no-one is as excited as me then....
(other than Dnny -- yup I send you the plans tomorrow)

I wonder whether this counts as an analogue or digital effect? I kind of figure analogue...?... maybe blurs the boundaries..

Anyway, its now in a stompbox form and sounding freaking amazing (with LFO modulation - varishape pulse and triangle - and CV foot control too)

I'll post pics and sounds tomorrow morning..

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Blue Hell
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PostPosted: Wed Jun 14, 2006 3:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

bugbrand wrote:
maybe blurs the boundaries..


Yes, its time discrete continues level processing, another interesting device using that is the bucket brigade delay. Sort of inbetween what's usually called analog and digital.

See we read you Very Happy

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bugbrand



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PostPosted: Wed Jun 14, 2006 4:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

HeeHee -- up pretty late in the Netherlands..!..
Cheers man!
((yeah, I know people had been reading..!.. I'm just super buzzed about it 'cos as far as I know there's only a very small handful of hardware bitcrushers - mainly the Frostwave Sonic Alienator and then digi effects like the Alesis Bitrman - so as far as I can see I'm onto something interesting and kind-of new..!..))

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Blue Hell
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PostPosted: Wed Jun 14, 2006 4:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

Ah well, what's late, looking forward to hear your samples tomorrow Very Happy
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Uncle Krunkus
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PostPosted: Wed Jun 14, 2006 7:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh, I'm excited! Very Happy
I'd like to do a stripboard for it if you want me to.
I'm just not sure when I'll next get the chance to scratch myself Laughing
I've also got some ideas I'd like to try adding to the foundations that you've begun, if that's okay.
How do you get those chips?

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bugbrand



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PostPosted: Thu Jun 15, 2006 1:42 am    Post subject: Reply with quote  Mark this post and the followings unread

YES! Any circuit improvements would be great! As I say, my electronics knowledge is pretty darn sketchy - very trial'n'error so I'm sure that you all with proper indepths could walk all over the circuit - that'd be GREAT!

..for super simple (ie not voltage controlled) check back to the first schematic I posted -- that'd be super simple to breadboard and works really well...

Hehe - yes, I know about the whole lack of time - ALWAYS! I gotta cram in so much stuff before I go on tour in a band at the end of next week - wobbling all around the UK that'll be so fun.!.

Ok for the chips go to www.analog.com and set up an account -- you need to have a business (or just make one up). Once its up and running you can order free samples - up to six chips (max two of any one type) can be sampled per order - so search for AD781 and scroll down to find the different ones -- there's actually two AD781 types that can be sampled (dunno the real difference between them) so you can get four total for free - and then you may as well grab a couple of AD633s for ringmods to fill up the sample cart!

OkOkOK SOUNDS!!!!!!
Guitar
TR505
Voice
Whistling

------ sounds like a bit crusher!!!
---actually, sounds a bit like a Gristliser when the modulation is fast & deep..!.. And check the aliasing wierdy-wonders with the Whistling!

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

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mosc
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PostPosted: Thu Jun 15, 2006 7:34 am    Post subject: Reply with quote  Mark this post and the followings unread

Wow, congratulations. Very nice looking and excellent sound demos. I like the guitar demo quite a bit. You should have lots of fun with this device. Well done... Very Happy
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Blue Hell
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PostPosted: Thu Jun 15, 2006 12:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sounds like its working well, in the voice a guitar tacks I heard some very nice things. The whistling I'm not sure about Very Happy
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bugbrand



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PostPosted: Fri Jun 16, 2006 2:26 am    Post subject: Reply with quote  Mark this post and the followings unread

CHEERS!
(oh but you don't like the whistles...... ach, just demo-ing the wierdy under'n'over-tones...)

Yeah, it works out pretty well on voice - one ace thing is that it seems to reduce feedback (to some extent - and I've not exactly done extensive tests) 'cos the high frequencies are crushed... May be good application for live bands... (though probably best used sparingly.!.)

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zipzap



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PostPosted: Sun Jun 18, 2006 3:42 am    Post subject: Reply with quote  Mark this post and the followings unread

That i Like!
Wonderful Sounds! I´ll build one!
What happens when you feed back the output?
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bugbrand



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PostPosted: Sun Jun 18, 2006 8:54 am    Post subject: Reply with quote  Mark this post and the followings unread

..hhmmmmm haven't tried that yet --- WILL DO!
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Basthian



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PostPosted: Fri Jul 28, 2006 6:21 am    Post subject: Reply with quote  Mark this post and the followings unread

Uncle Krunkus wrote:
Oh, I'm excited! Very Happy
I'd like to do a stripboard for it if you want me to.
I'm just not sure when I'll next get the chance to scratch myself Laughing
I've also got some ideas I'd like to try adding to the foundations that you've begun, if that's okay.
How do you get those chips?


How is that layout going? bugbrand told me to order some free samples of the AD781 and now I want to try it.

/André
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Uncle Krunkus
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PostPosted: Fri Jul 28, 2006 6:52 am    Post subject: Reply with quote  Mark this post and the followings unread

Sorry,
I just haven't had time. I'm trying to finish some projects first. I am interested in this though. Keep buggin' me. Smile

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Basthian



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PostPosted: Fri Jul 28, 2006 6:56 am    Post subject: Reply with quote  Mark this post and the followings unread

Uncle Krunkus wrote:
Sorry,
I just haven't had time. I'm trying to finish some projects first. I am interested in this though. Keep buggin' me. Smile


I will (<--- me buggin' you)
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v-un-v
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PostPosted: Fri Jul 28, 2006 7:33 am    Post subject: Reply with quote  Mark this post and the followings unread

Uncle Krunkus wrote:
"Wayne Kerr"!!?? Shocked
That's got to be a joke right? Laughing


"Wayne Kerr" was an alter-ego of Blue Jam genius Chris Morris.

He appeared several times interviewing several British MP's and others. So up their own arses that these people were, none got the joke Laughing

Yes- wayne kerr is a joke Very Happy

BUT- after doing a google search, it looks like there are indeed some poor fools who are actually called Wayne Kerr !! Laughing

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v-un-v
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PostPosted: Fri Jul 28, 2006 7:38 am    Post subject: Reply with quote  Mark this post and the followings unread

The Bit Crusher sounds wicked- especialy on geetar Smile

So much to catch up on after soooooo long without my computer Sad

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Blue Hell
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PostPosted: Wed Sep 20, 2006 12:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

EDIT by v-un-v; this is the link to the good schematics on the electro-music.com forum (so if Tombugs' external link goes down you lucky people will never loose them- hoorah!)

It doesn't matter if this EM link gets lost in the vaults, because this is the link to it (thank Jan :D ). Hoorah again! :D


Also see : http://electro-music.com/forum/post-90435.html#90435

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v-un-v
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PostPosted: Wed Sep 20, 2006 12:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

PS, Especially big thanks (and hugs) to Tom bugbrand for giving us this lovely circuit Very Happy

Thank you Tom! Cool

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bugbrand



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PostPosted: Thu Sep 21, 2006 1:20 am    Post subject: Reply with quote  Mark this post and the followings unread

Oh I've caused thread chaos - bad bugs!

I'll try to attach the files or do a link on the first post of the thread - that'd maybe sort things a bit or just make it more spaghetti

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