VU Meter

SirWattlesworthSirWattlesworth Registered User
I did some lighting for a hip hop show last week and had the idea of getting my source 4 par lights to become a vu meter for the bass frequencies. I was thinking I need to go through MIDI to get this effect to work. Any suggestions?

Comments

  • Marty PostmaMarty Postma Registered User
    edited May 2010
    I can't think of a way to make this work directly on the console, and I don't think you would need MIDI.

    Sounds like you would need to get a media server with a live input stream and a pixel mapper involved to get that effect.

    Once you are at that level of cost you might as well go to LEDs and ditch the PARs altogether.

    Hope this helps. :)
  • SfeerPeerSfeerPeer Registered User
    edited May 2010
    I know you can make a input by midi which triggers a quelist. Friend of mine did it with midi-sampled drumkit: when the drummer hitted a tom, a quelist would fire.
    Maybe you could create it using midi-output from a audio-compressor with a microphone or so?
  • serdar kastasserdar kastas Registered User
    edited May 2010
    I suggest you use Madrix or Canvix ! Can be controlled from the Desk ..(I'm using fullboar and Madrix software , led light or dimmer channel matrix control )There are audio options ;level meters,equalizer,level ring etc..
    example video: (http://www.videozaplat.com/izle/Yetenek-Sizsiniz-Turkiye-yari-final-2-bolum-14-subat-Serkan-Kilic-Beatbox-Show-)

    www.madrix.com
    http://www.visualproductions.nl/products/canvix.html
  • ChrisTallChrisTall Registered User, DL Beta
    edited May 2010
    I can see using a MIDI Event Processor to trigger the cuelists, but you'll need something to sample the audio and pull out the frequencies and relate them to MIDI notes.

    Catalyst has a Scope mode which I've used. Worked well, but more than you are looking for.
  • SirWattlesworthSirWattlesworth Registered User
    edited May 2010
    Would a microcontroller work like Arduino with a MIDI shield? Has anyone ever tried this?
  • AndrisAndris Registered User
    edited May 2010
    You can get really complicated and figure out a way to program an Arduino to listen for specific frequency peaks and have it send a MSC command to trigger a cue on the hog. The problem with this is you can't really get a good intensity scale that follows the music. Hog3 only understands MSC cue triggers, so you'd need to make a cuelist with several cues that builds the 'vu meter' and have the Arduino rapidly trigger the cues to make it look like the lights are reacting to the music. I think you'll probably run into processing delay issues and end up being behind the beat.
    Your best bet is not to use hog for this kind of application. I have used E:Cue before for this kind of thing and it has an effects engine that does respond to audio input quite nicely.
  • hertelhertel Registered User
    edited May 2010
    serdar kastas;47034 said:
    I suggest you use Madrix or Canvix ! Can be controlled from the Desk ..(I'm using fullboar and Madrix software , led light or dimmer channel matrix control )There are audio options ;level meters,equalizer,level ring etc..
    example video: (http://www.videozaplat.com/izle/Yetenek-Sizsiniz-Turkiye-yari-final-2-bolum-14-subat-Serkan-Kilic-Beatbox-Show-)

    www.madrix.com
    http://www.visualproductions.nl/products/canvix.html
    @serdar kastas Thank you for recommending our products. If you want to see all the realtime audio effects check out also this video at YouTube: http://www.youtube.com/watch?v=-xRXEUkWrqI

    :Eyecrazy: :notworthy: :headbang:

    Kind regards,
    Dipl.-Inform. (FH) Christian Hertel
    MADRIX - Sales Manager
  • SirWattlesworthSirWattlesworth Registered User
    edited May 2010
    If midi and arduino would bog down my system. Would Arduino reading audio and outputting DMX protocol hooked up in series with the lights work.
  • AndrisAndris Registered User
    edited May 2010
    Yes you can do that. You'd need a RS485 transceiver like the MAX485 and write some code to scale the incoming audio signal into DMX values and it will work. If you want to use it in conjunction with the hog or other console, then you'd need to get a device to HTP merge the DMX signal from both console and Arduino to the dimmers.
  • ChrisTallChrisTall Registered User, DL Beta
    edited May 2010
    This is ineresting...

    I'm thinking an LM3914 and a PIC processor.

    The LM3914 Bar/Dot display driver would feed the PIC, and the PIC would convert to MSC commands.

    If and when I get it built, I'll give a shout.
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