[sdiy] Midi knob box

[Troy Sheets]

Hi david, if you are interested in purchasing, the Encore Electronic's
Knobby and SlideMate are two nice 8 channel by 4 "pages" boxes.  They
have software you run on your PC/mac to assign the knobs.

http://www.encoreelectronics.com/cont_knob3.html

Might give you an idea, anyway...

Those DIY knob boxes look very cool, though...

-troy

On Wed, Dec 12, 2001 at 04:33:15PM +0100, David Brännvall wrote:
> I am not a sdiy:er yet, well I kind of am one if you count softsynths. Anyway I need a midi knobbox, and I thought it would be nice to build my own. I don't have the skills to do it on my own. I have a crazy idea that should work, it is ovious that this is a really BAD way of doing it. Let me explain why. First I route 4 mono channels out from my audio card, into 4 mono channels on my mixer. Then I let the computer generate sinwaves, ie 1 khz on channel 1, 2 khz on channel 2, 3 khz on 3, 4 khz..., then route the mixed signal back in to my computer (via one subgroup on the mixer). Then I have to write a simple program to detect the amplitude of the different frequencys (fouriertransform or something), and convert it to midicontroller messages. And voila the volume sliders on my mixer can be used to generate midi control data. Although this should be simple to implement and it wouldn't cost me a dime, it would waste alot of audio ios, midi ports, mixer channels, cpu power et!
 c.!
!
>   So what I really need is a real knobbox, would it be cheaper to build it, or buy it? Where can I find info/schemas.
> 
> Please help me to get started.
> 
> regards,
> David
> 
> 

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