[sdiy] TRYING TO RECREATE/CONFIGURE THE psych tone for modern use.

[Dan Snazelle]

this is why i now own over 85 vintage popular electronics magazines! great articles






--------------------------------------------
check out various dan music at:

http://www.myspace.com/lossnyc


http://www.soundclick.com/lossnyc.htm


http://www.indie911.com/dan-snazelle
(or for techno) http://www.myspace.com/snazelle


> Date: Mon, 25 Aug 2008 14:13:21 +0100
> From: admin at bugbrand.co.uk
> To: subjectivity at hotmail.com
> CC: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] TRYING TO RECREATE/CONFIGURE THE psych tone for modern use.
>
> Heya Dan,
>
> Can't be of any direct help right now, but....
> ...thanks for that link!
> - there are some great articles available if you trawl through the
> www.swtpc.com site (SWTPC standing for Southwest Technical Products
> Corporation *not* /South West Tractor Pullers Club!!/)//
> I found:
> -a valve theremin circuit artilce
> (http://www.swtpc.com/mholley/PopularElectronics/Apr1955/PE_Apr1955.htm)
> - reverb for your car!!
> (http://www.swtpc.com/mholley/PopularElectronics/Feb1966/PE_Feb1966.htm)
> - Don Lancaster's Musette Colour Organ
> (http://www.swtpc.com/mholley/PopularElectronics/Jul1966/PE_Jul1966.htm)
> - more reverbs!
> - something called 'The Amazing People Detector' !!!
>
> Basically, there's loads of interesting articles archived there. Ok,
> there's some quite old technology going on in most cases, but definitely
> worth a trawl.
>
> All best,
> Tom
>
> Dan Snazelle wrote:
>> THE PSYCH TONE....
>>
>> a psuedo random tone gen capable of 1728 different sequences.
>> I have really wanted to build this or something like it for a long time. at least the tone computer part and the pause gate.
>>
>>
>>
>>
>> to start with, here is a link to the original schematics:
>>
>> http://www.swtpc.com/mholley/PopularElectronics/Feb1971/PE_Feb1971.htm
>>
>>
>> you can also find an updated version in the TTL cookbook under: A MUSIC COMPOSER (pages 282-284 in my edition)
>>
>> in the new version he replaces the old flip flops with: 7474's (three of em) they are set/reset types and i am wondering if i can replace them with 4013's?? or maybe even 4015's???
>>
>> he also uses an 8 input Nand Gate called a 7430
>> and a 1 of 8 decoder called a 7442
>> and a 7486
>>
>> and a 555 clock (easy)
>>
>>
>> and some rotary switches.
>>
>> I think if i could figure out how to replace those old fashioned flip flops, i could get the sequence gen and the pause selector working. But then there is the question of how to HOOK up the result of the 1 of 8 decoder to a tone generator. in the old version, he uses a complicated series of transistors (including UJT's) to create a sound based on 3 inputs being high or low.
>>
>>
>> in the new one, the 7442 has 8 outputs which are to a "note generator" and it says LOW=note
>> but i dont know how i could implement that with either CV (could i use an 8 step R2r? but that would only get me 8 different notes..right?) or somehow into a cmos based oscillator...
>>
>>
>>
>> getting sound out of it is a major point of confusion for me. probrably since the old design is, well, so old!
>>
>> i have heard very mixed things about this but remember, i love all the stuff being built on the LUNETTA thread (on electro-music.com) so this would probrably be great as a CV generator front end.
>>
>>
>> any and all help appreciated.
>>
>> really trying mainly to figure out what kinds of flip flops to use and then how to convert the bits and pauses into sound or CV.
>>
>> thanks so much
>> man/listinfo/synth-diy
>>
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>>
>