The power to do my thang!- Introducing Mr Scott Stites :D

elektro80 · Posted: Sat Jan 07, 2006 5:27 pm Post subject:

The Copenhagen lysergics still rocks. Dunno.. Perhaps this is a EU thingie.

blue hell · Posted: Sat Jan 07, 2006 7:05 pm Post subject:

Scott Stites · Posted: Sat Jan 07, 2006 9:03 pm Post subject:

I'm not drawn to any cutlish or mojo-like aura of the SN76477 (though I am fond of the timbre of the PWM it produces). By the same token, in terms of scale, I would not list its assets as terribly meager.

Consider in one LSI you have an LFO, a linear VCO, a pre-randomized shift register with a controllable filter on the output, an envelope generator and a built in addressable mixer.

The noise generator pseudo-random length is adequate enough to have a fairly long cycle without repeating, which would take perhaps a couple of 4015's and EXOR's to randomize it. You'd have to rig a VCO and an LFO (triangle, mind you), a means to modulate one with the other, a mixer, and a at least one multiplexer. To control the level of the shift register out, you're going to need something on the order of a controllable amplifer or filter. For the output of the thing, a VCA would have to be rigged. Then of course, you would need rig a fairly simple EG.

None of that is rocket science. The point is, for a nice little accessory to the Sound Lab or something along those lines, this would be a means of producing some potentially interesting results with a minimum of circuitry. And, it would be a gas to do. Grab the SN76477, slap some extraneous circuitry to it, and go on your merry way. For me, that's the point of the idea.

A CMOS/Linear adaption (much more cirucitry) or a PIC or two (a little bit more circuitry and programming) would be preferable for numbers greater than a onesies/twosies. But, in that case, why emulate the SN76477?

Cheerio,
Scott

Uncle Krunkus · Posted: Sat Jan 07, 2006 9:12 pm Post subject:

I agree Scott,
Sometimes we should play around with old technology simply because it's fun to play around with old technology. Cool

v-un-v · Posted: Sun Jan 08, 2006 3:18 am Post subject:

blue hell · Posted: Sun Jan 08, 2006 3:21 am Post subject:

blue hell · Posted: Sun Jan 08, 2006 3:22 am Post subject:

Wild Zebra · Posted: Tue Jan 10, 2006 12:04 pm Post subject:

Allright, with all that being said. Is this a go. Have we gained interest?
I'll the electronic geniuses get it started. Sounds like it could be real cool. I chip, lots a fun, space invaders, dang.

v-un-v · Posted: Tue Jan 10, 2006 1:28 pm Post subject:

Okay- I've got to get these next couple of weeks out of the way (until the end of semester)- up to my teeth in assignments Sad

I'm well up for this (I may even treat myself to a PC (or get XP and run it under iEmulator)) so I can run schematic designer.

The actual circuit I reckon will be really easy. But I should add that there are different sized SN7's around. The one I sent you Zebra was the original sized one. Mine is much smaller (but not a surface mount type). It has an 'N' on the end I think.

Wild Zebra · Posted: Tue Jan 10, 2006 2:12 pm Post subject:

v-un-v · Posted: Tue Jan 10, 2006 5:59 pm Post subject:

Yes Beer! We're gonna need a lot of that too!!! Smile

Especially when you realise that Mosc (or was it Stein?) has duped me into this position of moderator- and reckons I'm some super-duper electronics techie (Mr Bicycle repairman? Very Happy

) when I too am more of a 'paint by numbers' sort of chap! LOL!

got some new super- psychedelic prog CD on the turntable right now. I'm diggin' it!

yes everything's groovy Smile

I don't know if you can get it in the States, but one of my favourite bottled English beers is Theakston 'Old Peculier' 5.6%vol. I recommend you sink some bottles Smile

for the web-minded;

http://www.theakstons.co.uk/

Wild Zebra · Posted: Wed Jan 11, 2006 7:15 am Post subject:

dnny · Posted: Wed Jan 11, 2006 11:30 am Post subject:

Wild Zebra · Posted: Wed Jan 11, 2006 12:22 pm Post subject:

Thanks for the link dnny. I hadn't seen that yet. Boy, that chip has alot going on. Let's exploit the heck out of it!!!

v-un-v · Posted: Wed Jan 11, 2006 12:56 pm Post subject:

Wild Zebra · Posted: Wed Jan 11, 2006 1:01 pm Post subject:

v-un-v · Posted: Wed Jan 11, 2006 1:02 pm Post subject:

dnny · Posted: Sun Jan 22, 2006 10:24 am Post subject:

have you seen this videoclip of SpaceSynth?
the SpaceSynths are made from the SN76477 (Space Invader) chips by Tony from ElectroKraft.

the video is great but the sounds don´t impress me - because whit one modded-WSG you could do almost the same and more.

so are there any samples where this chip is taken to it´s limits?

and if anyone knows where to get one of those SN7677 I'm interested -
so by experimenting i could learn more about this chip and finally fall in love whit it.

daniel

v-un-v · Posted: Sun Jan 22, 2006 3:27 pm Post subject:

Hmm- Blacet made a very similar device in the early 80's called the 'synbow'. But my idea was to use the SN7 as a modulation source, NOT a sound source. This way you can still use your favourite vintage sounding analogue monster instead of having to listen to just the SN7 sound source.

I'll have another look soon for the chip again (so you people can start experimenting!)

Tom

toppobrillo · Posted: Thu Jan 26, 2006 10:19 pm Post subject: sn76477n'n

hey-o

im a recent join of this electroforum thing.

i got one of those [complexsoundgenr8rs].. still in the package actually.
i haven't committed it to anything yet.

i have studied over every application for it i can find on the net.
which does not include schematics for the supercontroller, DSC or synbow,
unfortunately..

i would definitely like to see those too, so if any of you guys got'em and
wouldn't mind sharing a peek, lemme know. greatly appreciated and if i can be of any help to the cause i surely will.

byu the way, have youall seen the "arcade synth" PIC interface project for the 76477? i ran across it not too long ago.. checked it out?

joshr

v-un-v · Posted: Fri Jan 27, 2006 4:25 am Post subject: Re: sn76477n'n

toppobrillo · Posted: Fri Jan 27, 2006 4:28 pm Post subject:

first see this:

http://experimentalistsanonymous.com/board/topic-79-0-15.html

then download this:

http://experimentalistsanonymous.com/diy/Schematics/Full%20Synths%20and%20Drum%20Synths/Arcade%20Synthesizer.zip

i am going to put this on the "sn76477" forum entry

mosc · Posted: Fri Jan 27, 2006 5:13 pm Post subject: Re: sn76477n'n

v-un-v · Posted: Fri Jan 27, 2006 6:58 pm Post subject:

nice one : that beatbox gif is similar to what Ive got in mind. But howabout we automate those pots too- using a simple step sequencer?

I'm looking along the idea of an analogue 'nanoloop' type affair- which can be interfaced to external v.c. gear etc Smile

This is a nice circuit and a good place to start Very Happy

cheers!