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Re: [motm] Interest in a MOTM-102 module?

2005-12-29 by Richard Brewster

Yay!  I'll take two.  Now to discuss...

Digital noise and digital sampling is perfect.  Great idea.

Not sure of the value of a normal/shift switch.  Why would we want 4 
identical outputs (normal mode)?

I find that a clock polarity switch is very useful to choose whether the 
new sample is acquired on the rising or falling clock.  Center-off and 
you have infinite hold, which is perfect with this digital design.

The internal clock in the MOTM-101 is limited by a small range (it 
doesn't go very slowly), a lack of voltage control, and it is not 
available as an output (important for synchronizing other events to the 
new sample).  For these reasons I tend to use a MOTM-390 LFO to clock 
the 101.  I would like the internal clock to have some of these 
features, especially a larger range and an output jack.  VC would be cool.

This may be asking for a lot, but could it have a scale quantizer?  It 
is digital to begin with.  How much extra would adding a major/minor 
scale be?  How about a 3-position toggle switch:  major/minor/off.

Output correlation.  A nice feature of the Oakley S&H is the output 
"restriction".   It's a classic sample and hold feature that's done by 
mixing some of the output back with the input being sampled.  The more 
of the ouput mixed in, the closer the next sample will be to the current 
value.  With noise input this makes for nice meandering sequences 
without sharp jumps.

Panel thoughts.

2 Pots:  Input Level *or* Correlation, Clock Rate
2 Switches:  Quantizing, Clock Polarity
10 Jacks:  Input, Ext Clock Input, Int Clock VC input, Int Clock Output, 
Out 1, Out 2, Out 3, Out 4, White out, Pink out

Too many jacks!  Eight is all that will fit.  Let's lose the Int Clock 
VC input and the White out.  (Maybe provide a jumper option for the 
noise output to be white or pink.)

Ok, discuss!

-Richard Brewster


Paul Schreiber wrote:

>Thinking of a 1U wide, new noise/S&H module.
>
>Bad news: not a full kit, the pcb would be pre-soldered (teeny SMT parts). Still 
>have to wire it up, though :)
>Good news: check these features!
>
>a) White/Pink out, digitally generated (Pink is analog filtered).
>b) the S&H is a cascaded, 4-channel "shift register" type with *infinite* hold 
>time/zero droop (it's 12-bit digitized). There is a switch to either be 'Normal' 
>(each int/ext clock samples the Input and passes it to the 4 outputs at once) or 
>'Shift' (each clock shifts the previous stage down to the next stage, and In 
>always goes to Out #1).
>
>Like I said, not a full kit but a nifty module. And same price as current '101 
>kit.
>
>Discuss.
>
>Paul S.
>
>  
>

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