xxrich@alliant1.lerc.nasa.gov (Rich Rinehart) (12/05/90)
There was a post to rec.music.makers a few weeks ago that didn't really get answered. Does anyone have information on making a controller driven by MIDI information? I am personally interested in controlling lights via my musical sequencing, but really anything electronic could be controlled. Thanks! -rich -- ----------------------------------------------------------------------------- Rich Rinehart | phone: 216-433-5211 NASA Lewis Research Center | email: xxrich@alliant1.lerc.nasa.gov -----------------------------------------------------------------------------
djw@hpldsla.sid.hp.com (David Williams) (12/07/90)
> There was a post to rec.music.makers a few weeks ago that > didn't really get answered. Does anyone have information > on making a controller driven by MIDI information? I am > personally interested in controlling lights via my musical > sequencing, but really anything electronic could be controlled. I guess it's just another microcontroller kind of project. You need a uP (nothing in MIDI can be done without one), a MIDI port (that is opto-coupler, and UART), some code, and I guess if you want to control lights some industrial strength digitally controlled switching electronics. My suggestion in the uP department is something like a Motorola 6802 (built in serial port that will run at MIDI speed, some RAM, etc), or maybe even 68HC11 (lots of stuff, including an A/D converter). Read any book on MIDI, they'll tell you need a Sharp PC-900, or HP 138? opto. There has been a few articles on uP based MIDI projects in Electronic Musician (recent), Keyboard (a Casio SK-1 mod'), others back around 86/87 (when people still built home brew MIDI interfaces for their home PCs). Also, get the service manual for some MIDI box, that helps me - say any little Yamaha control box. I'm sure there a million things out there that can tell you about controlling lights. Hope that helps some. David Williams ___________________________________________________________________ Hewlett-Packard Scientific Instruments Division (SID) /\___________ 1601 California Ave, Palo Alto, CA, USA. /\______________/\________ phone: 415 857 6100. FAX: 415 852 8011 //\\____________|__________ HP-UX Mail: djw@hpldsla.hp.com / \____/\____/\___________ HPdesk: (djw)hpldsla/HP1900/00 /\____________/ \__________
michael@boulder.Colorado.EDU (Michael Williams) (12/08/90)
>> on making a controller driven by MIDI information? I am >> personally interested in controlling lights via my musical >> sequencing, but really anything electronic could be controlled. > >I guess it's just another microcontroller kind of project. You >need a uP (nothing in MIDI can be done without one), a MIDI port Ouch! Nothing in MIDI without a uP? Wow! I just recently built a MIDI project using nothing more fancy than a UART. Happened to be a MIDI light controller ! :-) Funny thing, eh? I know its easy to do things WITH microprocessors, but whatever happened to Karnaugh maps, etc. (not that I really like them). With a little thought about what MIDI sends (ie MSB=1 for system commands, such as NOTE ON), and a little logic design, one can take the words coming from the UART and process through to the final stages of registers driving your relays. I have built to versions of this: (1) lights controlled by key #, the most useful (2) lights controlled by velocity of a particular key. very specific to drum machines with limited # of keys. Good luck! Michael ******************************************************************************* Michael Williams Internet: michael@synapse.nsma.arizona.edu "I need someone who'll gimme a dollar!" - Users of the Wicked Gravity. ******************************************************************************* Michael Williams Internet: michael@synapse.nsma.arizona.edu "I need someone who'll gimme a dollar!" - Users of the Wicked Gravity.