[sdiy] Midi knob box

[Sowa Roman]

Hi,
I just subscribed today. Maybe some of you may remember me from 2 years ago.
First, hello to everyone, and second, my shameless plug:

I'm working on something like that, for 8 knobs, but it's expected
to appear on march. Right now I can offer a midi keyboard brains
with 3 controllers. Only 3, but that's all I can offer right now.
Take a look:

http://romcio.multimania.com/small_midi.html

Roman

""-----Original Message-----
""From: David Brännvall [mailto:david at brannvall.net]
""Sent: Wednesday, December 12, 2001 4:33 PM
""To: synth-diy at dropmix.xs4all.nl
""Subject: [sdiy] Midi knob box
""
""
""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 etc.!
""  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
""


---------------------------------------------------------
This message has been scanned for viruses by MIMESweeper.

Wiadomosc zostala sprawdzona pod katem wirusow przez
oprogramowanie MIMESweeper.