MOTM

This is heresy to suggest..But since many MOTMERS seem to be in dire
need of a full featured mixer here is my suggestion...Barry Klein has
plans for such a device in his electronic music book he sells
privately.  Sorry I don't have his web site address handy..I think it is
listed in the links list of many analog synth web sites.   It is
completely of easy to find inexpensive op amps and other cheap parts and
looks easy to build even by simple
point to point wiring.  It does have switchable inversion and mixes both
dc control voltages and of course ac audio signals..BTW don't get me
started!   It seems to me that looking around for analog synth kit/ready
built modules manufacturers the audio mixer module is often clearly
overpriced considering the simplicity and low cost of the parts (Paul
save your cost of doing buisness rant please!)..even when factoring such
overhead..But the all time undisputed king of all module cost vs funcion
overpricing by everyone is the multiples module!

For the record I am not singling out Paul or mean to imply him so please
spare me your flames!
For what it's worth..

If you're gonna build your own mixer, easiest thing is to buy 1 or 2 of Tony
Allgood's mixer pcbs, buy a few parts and stick it behind a MOTM panel. It
uses a MOTM connector, the pots are spaced correctly, the boards mount using
sturdy pot clips, and you can build a 3 input 1U or a 6 input 2U version.
Choose your opamp to optimize for CV or audio mixing.

Dave Bradley
Principal Software Engineer
Engineering Animation, Inc.
daveb@...

> -----Original Message-----
> From: LD [mailto:jar5831@...]
> Sent: Tuesday, July 18, 2000 9:25 AM
> To: motm@egroups.com
> Subject: [motm] MOTM heresy here!
>
>
> This is heresy to suggest..But since many MOTMERS seem to be in dire
> need of a full featured mixer here is my suggestion...Barry Klein has
> plans for such a device in his electronic music book he sells
> privately.  Sorry I don't have his web site address handy..I think it is
> listed in the links list of many analog synth web sites.   It is
> completely of easy to find inexpensive op amps and other cheap parts and
> looks easy to build even by simple
> point to point wiring.

I have built one of these and I must compliment Tony on the performance for
part count ratio.  This is a neat little mixer for not too many parts.  And,
Dave Bradley shared a lot of good normalizing schemes with me that allow the
mixer to be 3-IN-1-OUT, 1-IN-3-OUT or separate reversing attenuators.  It is
great for AC.  I really like the usefulness that can be crammed into 1U of
space.  However, I have some issues with use of the mixer for DC if you need
very high accuracy. It is not accurate enough for say keyboard CV.

This is not criticism, just observations of the performance as I see it for
others that may be considering it.  I would be happy to go into more detail
privately since it is somewhat OT.

Larry H.

----- Original Message -----
From: Dave Bradley <daveb@...>
To: <motm@egroups.com>
Sent: Tuesday, July 18, 2000 9:44 AM
Subject: RE: [motm] MOTM heresy here!


If you're gonna build your own mixer, easiest thing is to buy 1 or 2 of Tony
Allgood's mixer pcbs, buy a few parts and stick it behind a MOTM panel. It
uses a MOTM connector, the pots are spaced correctly, the boards mount using
sturdy pot clips, and you can build a 3 input 1U or a 6 input 2U version.
Choose your opamp to optimize for CV or audio mixing.

Dave Bradley
Principal Software Engineer
Engineering Animation, Inc.
daveb@...

> -----Original Message-----
> From: LD [mailto:jar5831@...]
> Sent: Tuesday, July 18, 2000 9:25 AM
> To: motm@egroups.com
> Subject: [motm] MOTM heresy here!
>
>
> This is heresy to suggest..But since many MOTMERS seem to be in dire
> need of a full featured mixer here is my suggestion...Barry Klein has
> plans for such a device in his electronic music book he sells
> privately.  Sorry I don't have his web site address handy..I think it is
> listed in the links list of many analog synth web sites.   It is
> completely of easy to find inexpensive op amps and other cheap parts and
> looks easy to build even by simple
> point to point wiring.


------------------------------------------------------------------------
Shoes? On the web?
Click Here!
http://click.egroups.com/1/7061/6/_/529958/_/963931659/
------------------------------------------------------------------------