Home Products Downloads Registration Support  


Coyote AmpliDude is a DirectX plugin that implements high-quality amplitude modulation effects. Advanced audio processing algorithms produce a very clean output, free of artifacts.

Some of the unique features of the Coyote AmpliDude are:
  • Sine, triangle-wave and rectangle-wave low-frequency oscillator (LFO)
  • Duty-cycle control for the rectangle-wave LFO option
  • Randomized option for the LFO, for a more natural, less mechanical sound
  • Built-in filters to allow amplitude modulation of specific ranges of frequencies
  • Tap-tempo button for easily matching the tremolo rate to the beat of the song
  • Handles professional audio formats, including 16-bit, 24-bit and floating-point, at up to 192 KHz sampling rate
  • Supports presets
  • Clipping indicator
Coyote AmpliDude should be compatible with any audio application that accepts DirectX plugins. It has been tested with several of the more popular applications.

Have a look at a screen shot: PhaseOne ScreenShot


By setting the LFO Type to Sine, a tremolo effect similar to that found in vintage amps and stomp-pedals is achieved. The LFO Rate, and Depth can be adjusted to obtain a wide variation in the effect, from a gentle oscillation, up to a rapid pulsation.


Setting the Stereo button to Invert results in the left and right channels of a stereo signal being increased and decreased in amplitude in opposition to each other, which causes the sound to seem to sweep from left to right and back. Using the filter to control the range of frequencies which is swept can result in some subtle or wild effects, not available in any other plugin we know of.


Setting the LFO Type button to Rectangle results the amplitude suddenly switching between a high value and a low value. If you set the depth high enough, the audio will actually cut out periodically. Use the Duty Cycle slider to control the ratio between the "on" and "off" times. Again, the Filter control can produce some really unique sounds!


PCRecording.com recently reviewed AmpliDude and had this to say: "...AmpliDude does produce some interesting effect...Coyote has put together a set of effects that are easy to use and understand". Read the whole review here.

Evaluating and purchasing Coyote AmpliDude

You can install the demo version of Coyote AmpliDude and run it for the purposes of evaluation. It is fully functional but it will mute the audio for a half-second every 30 seconds.

Once you have decided to purchase Coyote AmpliDude, payment may be made by cheque, money order or credit card. The registration fee is only $19.00 U.S. and this entitles you to technical support from Coyote's responsive support staff, as well as a free upgrade to any future version of the plugin. When you register, the full version of the plugin will be sent to you by e-mail.

If you want to quickly hear some of the capabilities of this remarkable plugin, go to the Demos page and download the sample files.

See the Downloads page for a list of sites from which the evaluation version of Coyote AmpliDude can be downloaded.

Problems with Coyote AmpliDude?

First, have a look at the list of Frequently Asked Questions. If your problem is not answered there, e-mail Coyote. Please clearly state your problem, the conditions under which it happens, and what version of Coyote AmpliDude you are using, along with any other info you think might be relevant.

System Requirements
  • Runs under Windows 98, NT, Windows ME, Windows 2000 or Windows XP.
  • Pentium-III, Pentium-4 or Athlon recommended, with:
  • At least 64MB of RAM, and
  • A 16- or 24-bit sound card
  • DirectX 8 or higher (available free from Microsoft)
    (DirectX 3, with Windows NT 4.0, is also suitable)
  • An audio application that supports DirectX plugins.

Last update: Dec, 2003
E-mail Coyote