Vintage Synth Repair

Yes, interesting project, but I'm not sure CS01 is the best candidate for 
such a customization. I don't have the schematics, but I opened mine a 
couple of times for cleanup and I think most of the electronics has been 
packed in a custom made chip.
However, I'd be very curious to see how this micro-synth could be 
customized.
If I remember well, the model II is very close to the original (the one I 
have) except for the Resonance which is a slider instead of a switch. Is the 
filter capable to self-oscillate on this model ? And what is the value for 
this slider ?

Fran\ufffdois


>From: "P........" <phd76er@...>
>Reply-To: vintagesynthrepair@yahoogroups.com
>To: vintagesynthrepair@yahoogroups.com
>Subject: [vintagesynthrepair] Yamaha CS01II mods questions
>Date: Sat, 28 Oct 2006 01:52:49 -0000
>
>I've got this olde yamaha cs01 which is functional but in a bad shape
>- no case, just bare electronics. It's a wonder that this thing works
>at all. I would like to make a new case for it and also seize the
>opportunity to make some modifications on it but I need some advice on
>what's possible to do and what not, so here's what I wanna do:
>
>- I want to replace the wave form selector with individual switches so
>that I can mix multiple waveforms with each other (saw+tri+pulse and
>such)
>
>- I also want to add another row of switches to individually select
>waves to modulate the filter by osc.
>
>- I want to replace the switch for the mod wheel with individual
>switches for vibrato and filter modulation and add another one so I
>can modulate vca as well and one to bypass LFO modulation.
>
>- I would like to add ADSR controls for OSC and VCA and a switch for
>each and VCF to bypass either of these.
>
>- I want to add controls to shape my own waveforms (kinda like on the
>Roland sh3a.
>
>- a input for VCF and OSC would be cool, if that works at all (audio 2
>OSC that is) and some patch points would be awesome so that I can do
>stuff like syncing vcf to pwm and such.
>
>- Also I need to get the LFO to modulate much deeper and faster/slower.
>
>Lotsa plans, eh? Well let me know what can be done and some
>examples/instructions for already accomplished mods would be veeery
>helpful and time saving.
>
>
>
>

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