U-HE ACE TIP: Pulse Width Modulation Basics


After watching my YouTube video “u-he ACE Tutorial: Patch Cables 101”, I had a viewer ask “How can i modulate the pulse width of the osciliator?”, so I thought I’d do a quick answer here in text form. Click the image above to see a larger version of the synth. Annotation numbers in diagram match steps below.

For VCO1, LFO2 is already hard-wired to modulate pulse width. To get going follow these steps:

  1. Turn the Waveform1 knob clockwise to select pulse width
  2. Turn the lfo2 knob clockwise. You’ll hear Pulse Width Modulation right away
  3. Turn the sync knob to increase the speed of modulation
  4. Turn pw knob to set the PulseWidth

Play around with other lfo2 params to get more extreme results.

Mark Mosher
Electronic Musician, Boulder CO

Synth: u-he ACE

Mark Mosher • Audio/Visual Synthesist | Boulder, CO View All →

Artist site: http://www.markmoshermusic.com
Host of Sonic Encounters Podcast: http://markmoshermusic.com/podcast/.
Boulder Synthesizer Meetup founder and host: http://www.bouldersynth.com

1 Comment Leave a comment

  1. I find hard in visiting sites that could actually give me this information. I’m glad that I found it here in your site. It’ll be a great help to those newbie in using computes especially in modulating pulse width of the oscillator. It’s a nice tip. I would have to inform my friends about it. For sure they’ll love it as well.


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