4 ms·

I made a video about the FFT a few months ago that I hope might offer another perspective to help understand these concepts: https://www.youtube.com/watch?v=iyj

I made a video about the FFT a few months ago that I hope might offer another perspective to help understand these concepts: https://www.youtube.com/watch?v=iyjIVSnrPSo&t=271s https://www.youtube.com/watch?v=iyjIVSnrPSo&t=271s The FFT segment starts at 4:30 (linked), the specific part about phase and magnitude is at 5:45, and the part about negative vs. positive frequencies starts at 6:35.

ByThyGrace 5y ago
Making quality animations drive the point home is not so easy to pull off, so thanks for sharing. Both interesting and impressive.
- nitrogen 5y ago
  Thanks for taking a look!
erwincoumans 5y ago
Very nice video, the 3d animations and colors make it look very professional. What tool(s) did you use to create the video? Ruby? OpenGL? A custom synthesizer?
- nitrogen 5y ago
  All of the above. I have a custom animation system written in Ruby that talks to some visualization software I wrote using C and OpenGL. The synthesizer is also in Ruby, and the core audio code for that is on GitHub. I use Inkscape for overlay graphics, and reboot into Windows for VEGAS for editing and compositing.
  - nitrogen 5y ago
    ...and thanks for checking out the video!
  - erwincoumans 5y ago
    I've never tried Ruby, but would love to try out that synth and its visualizations. Do you plan on making them available?
    - nitrogen 5y ago
      You can try the synthesizer and other audio code if you're using Linux. Here's an earlier version of the synthesizer (licensed under AGPL3). The MIDI CCs for controlling different parameters are listed in the source code. You'd want to clone the repo, run through the installation instructions in the mb-sound repo, do a bundle update mb-sound, then run bundle exec bin/complex_synth.rb. https://github.com/mike-bourgeous/mb-surround/blob/3823de44a55f083c6cc914621c9c93a49f57b710/bin/complex_synth.rb https://github.com/mike-bourgeous/mb-surround/blob/3823de44a... Here's the core sound repo (licensed under BSD) with some examples for getting started: https://github.com/mike-bourgeous/mb-sound https://github.com/mike-bourgeous/mb-sound I don't plan on making the visualizations available, in part because the system is too convoluted and they probably only work in my specific environment.
      - erwincoumans 5y ago
        Very nice, thanks a lot, will try it out. Does the synth have gui?
        nitrogen 5y ago
        No, just MIDI CC controls. I control it with a hardware keyboard, but anything that can generate note events and MIDI CC changes can be wired in with jackd and a patchbay like Patchage.

ByThyGrace 5y ago

Making quality animations drive the point home is not so easy to pull off, so thanks for sharing. Both interesting and impressive.

nitrogen 5y ago
Thanks for taking a look!

erwincoumans 5y ago

Very nice video, the 3d animations and colors make it look very professional. What tool(s) did you use to create the video? Ruby? OpenGL? A custom synthesizer?

nitrogen 5y ago
All of the above. I have a custom animation system written in Ruby that talks to some visualization software I wrote using C and OpenGL. The synthesizer is also in Ruby, and the core audio code for that is on GitHub. I use Inkscape for overlay graphics, and reboot into Windows for VEGAS for editing and compositing.
- nitrogen 5y ago
  ...and thanks for checking out the video!
- erwincoumans 5y ago
  I've never tried Ruby, but would love to try out that synth and its visualizations. Do you plan on making them available?
  - nitrogen 5y ago
    You can try the synthesizer and other audio code if you're using Linux. Here's an earlier version of the synthesizer (licensed under AGPL3). The MIDI CCs for controlling different parameters are listed in the source code. You'd want to clone the repo, run through the installation instructions in the mb-sound repo, do a bundle update mb-sound, then run bundle exec bin/complex_synth.rb. https://github.com/mike-bourgeous/mb-surround/blob/3823de44a55f083c6cc914621c9c93a49f57b710/bin/complex_synth.rb https://github.com/mike-bourgeous/mb-surround/blob/3823de44a... Here's the core sound repo (licensed under BSD) with some examples for getting started: https://github.com/mike-bourgeous/mb-sound https://github.com/mike-bourgeous/mb-sound I don't plan on making the visualizations available, in part because the system is too convoluted and they probably only work in my specific environment.
    - erwincoumans 5y ago
      Very nice, thanks a lot, will try it out. Does the synth have gui?
      - nitrogen 5y ago
        No, just MIDI CC controls. I control it with a hardware keyboard, but anything that can generate note events and MIDI CC changes can be wired in with jackd and a patchbay like Patchage.