[sdiy] sequential multitrack schematics.

[harry bissell]

Save you the trouble... the CV selects the waveform

H^) harry

Cole Groff wrote:
> I'll contact the fellow who made the interface.
>
> Do you see down towards the bottom, the "Wave Select CV."  And then
> farther down there is a 10K potentiometer.  I'm guessing the
> potentiometer selects the wave?
>
> Cole
>
> On 9/26/06, Altitude <Altitude at optrand.com> wrote:
>> Cole,
>>   without looking at the data sheet for the 3394 (which you will 
>> probably
>> need to do), I'll guess that it the CV is divided into 4 ranges which 
>> select
>> the waveform
>>
>> -----Original Message-----
>> From: owner-synth-diy at dropmix.xs4all.nl
>> [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Cole Groff
>> Sent: Tuesday, September 26, 2006 10:49 PM
>> To: synth-diy at dropmix.xs4all.nl
>> Subject: Re: [sdiy] sequential multitrack schematics.
>>
>> Thanks Raph.  This looks really nice.
>>
>> What I don't understand about this interface, is how it selects which 
>> wave
>> form to use.
>>
>> How do you do this?
>>
>> Cole
>>
>> On 9/26/06, Altitude <Altitude at optrand.com> wrote:
>> > No, its all analog goodness.
>> >
>> > Aaron Cram designed and interface for it for modular use:
>> >
>> > www.ori.org/~aaronc/synth/CEM3394_V2.pdf
>> >
>> > Don't go hacking apart a multitrak for parts if it still works, its
>> > still a cool synth :P
>> >
>> > Cheers,
>> > Raph
>> >
>> > -----Original Message-----
>> > From: Cole Groff [mailto:chonald at gmail.com]
>> > Sent: Tuesday, September 26, 2006 5:42 PM
>> > To: Altitude
>> > Subject: Re: [sdiy] sequential multitrack schematics.
>> >
>> > Does the CEM 3394 need a computer or microprocessor to control it?  Or
>> > can it be made into a synth module?
>> >
>> > On 9/26/06, Altitude <altitude at optrand.com> wrote:
>> > > They were all socketed on mine
>> > >
>> > >
>> > > __________________________________________
>> > > "Setting the RESONANCE to high level might prove interesting" -
>> > > Roland
>> > > SH-101 Manual
>> > >
>> > > www.no-ho.com
>> > > www.teknatural.com
>> > >
>> > >
>> > >
>> > > -----Original Message-----
>> > > From: owner-synth-diy at dropmix.xs4all.nl
>> > > [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Cole Groff
>> > > Sent: Tuesday, September 26, 2006 4:05 PM
>> > > To: synth-diy at dropmix.xs4all.nl
>> > > Subject: Re: [sdiy] sequential multitrack schematics.
>> > >
>> > > Thanks guys.
>> > >
>> > > On to my next questions:
>> > > How hard will it be to remove these CEM chips from the SCI's circiut
>> > board?
>> > >
>> > > Are there any precautions I should take, or special things I 
>> should do?
>> > >
>> > > Cole
>> > >
>> > > On 9/26/06, Bob Weigel <sounddoctorin at imt.net> wrote:
>> > > > These are a great sounding little machine.  Most compact velocity
>> > > > sensitive poly analog that I know of. And yes it uses the CEM3394
>> > > > as does six-trak, Split-eight (still have one for sale here but
>> > > > it's so mint I'm waiting for the right buyer), and MAX as well as
>> > > > the Akai AX-60 and 73 as I recall.
>> > > >
>> > > > There is lots of info off my cu.imt.net/~sounddoctorin/synthtec 
>> page.
>> > > > Just follow the logical links to SCI etc.  Also note that there is
>> > > > a design flaw in the machine which causes the battery to discharge
>> > > > in about a year and a half.  If you don't enjoy replacing
>> > > > batteries I can show you how to fix that.  Much...pain finding the
>> problem.
>> > > > Would never object to being tipped for the tip on that one.
>> > > >
>> > > > As far as I know there is no specific parameter edit on these
>> > > > machines but patches are small so dumping a patch is probably 
>> how it's
>> done.
>> > -Bob
>> > > >
>> > > > Cole Groff wrote:
>> > > >
>> > > > > is there anywhere to find out what's inside a multitrack?  i
>> > > > > might have the opportunity to buy one from a friend.  i want to
>> > > > > know what's in there.
>> > > > >
>> > > > >
>> > > >
>> > >
>> > >
>> >
>> >
>>
>>
>
>