That's
exactly what I was thinking. Spend some time to picking the closest
thing.
Cheers,
-----Original Message-----
From: Floyd Smoot [mailto:tubetater@...]
Sent: 30. October, 2003 17:28
To: crumar@yahoogroups.com
Subject: [crumar] Re: New Owner of an OTR/Orchestrator
Good idea Margus. I was
thinking of doing something like that. I From: Floyd Smoot [mailto:tubetater@...]
Sent: 30. October, 2003 17:28
To: crumar@yahoogroups.com
Subject: [crumar] Re: New Owner of an OTR/Orchestrator
suppose the pins will be different. I was thinking of making a small
wire-wrap board with the other chip and an empty 14-pin socket that
would plug into the empty 4727 socket. Is that what you are thinking?
But I still think someone must have some of those chips sitting in a
dusty old bin somewhere, or in a deceased crumar keyboard!
floyd--- In crumar@yahoogroups.com, "Margus Kliimask"
wrote:
> Sorry, no idea. Maybe you can find a substitute, a counter should
be quite a
> trivial thing. For example, ARP Omni uses 4520 (which is also
CMOS), they
>; should be readily available. As to why there's only ten of them, I
have no
> clue. Check again, you should have two more :)
>
> Regards,
>
> -----Original Message-----
> From: Floyd Smoot [mailto:tubetater@y...]
> Sent: 29. October, 2003 01:50
> To: crumar@yahoogroups.com
> Subject: [crumar] Re: New Owner of an OTR/Orchestrator
>
>
> you are exactly right, margus! In my Orchestrator the chip is a
4727,
> which i think is a cmos counter. Any idea where I can buy one? I
have
> struck out so far.
>
> funny thing is I only see 10 of those chips- seems like there should
> be 12.
>
> Thanks for your help!
>
> floyd--- In crumar@yahoogroups.com, "Margus Kliimask"
> wrote:
> > I don't know about OTR keyboard (does this stand for Orchestrator?
> which is
> > actually Multiman) but in these 'organ-style' keyboards the sound
is
> > generated by TOS (Top Octave Synthesizer chip which generates all
> 12 base
> > frequencies) which are then divided down by divider chips for
lower
> octaves,
> > one for each note (12 altogether). In my Performer this divider
> chip is
> > TDA1008, I bet one of your dividers is either dead or
> malfunctioning. You
> > can try swapping the C note divider (should be the first one from
> left) with
> > another one and see if the dead note moves to another note.
> >
> > Cheers,
> > Margus
> > Service.
>
>
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