Following the blinking LFO light on a hardware synth


    Apr 25 2014 | 1:46 pm
    This is a fantasy project,
    The synth is a Yamaha CS-5, although if i got it working i'd also try it on my fender rhodes which also has a blinking LED.
    The light turns off and on to show the rate of the LFO.
    Can i set up a light sensor or camera and a Max patch that measures the rate and either outputs a number in BPM or drives an LFO that matches the LFO in the synth?
    any thoughts? x

    • Apr 26 2014 | 1:40 pm
      this should be doable with a cam and jitter i guess. Another thing to consider would be to pull the voltage applied to the led out of the synth and analyse it directly. Then the use of [timer] would be straightforward.
    • Apr 26 2014 | 1:50 pm
      thanks for your reply,
      as to the voltage from the LED, it did occur to me, but i hesitate before taking apart my synth? i don't suppose there is another way to "pull the voltage applied to the LED out of the synth",
      assuming i managed this - being new to max - how would one use [timer]?
    • Apr 26 2014 | 3:04 pm
      My nephew did something like this, but to synchronize its pedals, delays, chorus and other time based effects .. even a cute envelope follower whose light increases as a function of the amplitude. What did I think I should ask him directly, but can not receive or make calls from El Chino and I think this week is in isolation. I think: Led Photoresistor (LDR) and a microcontroller, probably an arduino or something based on ATMEL ... The information collected in the arduino is processed in this wonderful, wonderfull application. If CAM>jitter.. If i wanted capture all the lights... I think hmmm the fps per second... Regards Wendy
    • Apr 26 2014 | 3:18 pm
      Thanks Wendy, naturally my heart beats a little faster thinking that you are the Wendy Carlos, who still inspires me (switched on bach), but this being the internet i suspect you have just taken the name,
      either way, thanks for your response, i almost bought an arduino and light sensor yesterday- but i'm hesitant, more research required, should you manage to contact your nephew please let me know,
      x
    • Apr 26 2014 | 3:24 pm
      So is the internet, my dear, one can not be sure of anything. I'm glad you're on track. regards
    • Apr 27 2014 | 8:35 am
      If you've got a cam, I would first try the jitter road with a high rate metro.
    • Apr 27 2014 | 10:55 am
      I'd never do this with a cam, the photo resistor thing is just so much more convenient IMHO
    • Apr 27 2014 | 10:59 am
      i'm open to both options, anyone got an example of a jitter patch that would do this?
    • Apr 27 2014 | 1:12 pm
      LDRS May be, with ultra high speed fps cam.. or http://people.csail.mit.edu/mrub/vidmag/
    • Apr 27 2014 | 1:12 pm
      LDR May be, with ultra high speed fps cam.. or http://people.csail.mit.edu/mrub/vidmag/
    • Apr 30 2014 | 1:53 pm
      Arduino Uno, Breadboard, Light Depending Resistor, Jump Leads... I'm on my way x
    • May 04 2014 | 8:45 pm
      current version, arduino, LDR... no max yet, just clumsy hardware x
    • May 21 2014 | 5:07 pm
    • May 22 2014 | 11:07 am
      Nice. …and if it is the real Wendy Carlos, so pleased that she's using Louis Wain's 'Electric Cat' as her avatar! Cheers Roger