[sdiy] string machine technology?

[David Moylan]

Some string machines used chorusing units (BBD), others used multiple 
top octave divider chains slightly out of tune.  Don't recall which the 
Freeman used but the Paia Organtua used 2 (adjustably) tuned master 
oscillators to thicken the sound.  Paia Strings n' Things used 
chorusing.  They both came in the typical Paia black case with controls 
to the left.

I haven't played an Organtua but I did see one on Ebay recently.  Don't 
think it went for too much.  Might be a good one to stick a chorus after 
as well.  I had a Strings n' Things.  It was decent and also had a 
rudimentary piano sound which was more harpsichord-y.  It was not an 
Omni though, understandably if you look at the original price for both.

Dave

Peter Blackett wrote:
> Dear Rykhaard, and DIy list.
> as mentioned before if you are copying most of the production string 
> machines they use top octave generators and BBD delay ic chips to 
> produce the chorus effect.
> it would be possible to use separate oscilators,to rep[ace the tog ic , 
> but I don't think it is easy to reproduce the chorus effect without the 
> BBD delay ic's.
> [ if it is please let me know ! ]
> But I would be interested to know what the Original String machines 
> built by Ken Freeman [ is that the correct person ? ] used.
> of course if you have the space you could probably find a late 1970's 
> organ that has a string synth built in at a good price.
> regards Peter
> 
> D.A.M.I.A.N. wrote:
> 
>> I thought of this tonight at work - finding a service manual for a
>> String Machine, and cloning it.  Then my brain wandered off into the
>> areas of simple design.  
> 
>