MOTM

Is anyone else interested???  Perhaps we could get Larry to do a few for a more
afordable reward ????   : )  Larry ....why so costly ?
Ringo Jim

J. Larry Hendry wrote:

>
> > ----- Original Message -----
> > From: <weld@...>
> > Ive had a day to digest my MOTM system.
> > I must say Pauls designs and build is A-One!
>
> You're preachin' to the choir.   HA HA.  That's why we keep buying and
> bugging Paul about when the next module is coming out.
>
> > He should win some kind of award!
>
> He is rewarded with some loyal customers.  And, I think his wife is getting
> a new kitchen.
>
> > One wish on the VCO, would be preset octave switches.
> > I once had a 2600 modded with this and it was a nice addition.
> > Anyone done this or have any thoughts ?
>
> I have always loved octave switches.  I have made a stand alone module for
> my MOTM that does just that.  In fact, it has not only octaves but other
> musically useful intervals.  However, it is strickly a DIY thing and not
> available as a kit or constructed module.  There are two ways to approach
> this issue:
>
> # 1 - I first thought about a VERY simple module with a rotary switch and
> some resistors and some trimmers that would produce a voltage that could be
> connected to one of the MOTM-300 FM inputs.  As that voltage was switched,
> it would add internally to the 300 VCO 1-volt-per-octave signal to give
> octave or other interval switching.
>
> However, my idea was frowned upone by those of greater minds and I was
> convinced to do something a little better.  Hence # 2.
>
> # 2 - This modules adds two DC voltages VERY accurately.  One voltage is the
> 1-volt-per-octave keyboaerd CV and the other is a voltage produced in the
> module to produce octave or other musical intervals.  The output of this
> module feeds the 300 VCO or other VCOs to give you instantly switchable
> octaves and intervals.
>
> You cannot use a generic mixing module for this function because even very
> small variations or errors in the keyboard CV result in audible pitch error.
>
> I can send you the information about the circuit.  I have one successfully
> built on Paul's protoboard and it works fine.  However, it is strictly DIY.
> If you just got your MOTM and are enjoying it, that means you must have
> purchased assembled modules.  Many of us buy kits.  The circuit I have for
> octave shifting could not be recommended for someone brand new to building
> electronics.  It is not available as an assembled modules (unless you have
> hundreds of dollars burning a hole in your pocket these days.  I am not
> cheap, but everyone has a price.  HA HA).
>
> Stooge Larry