Difference between revisions of "Resonator"

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Consider this article a stub while we wait for an official definition of what the Axe-Fx's resonator does.
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{{Ultra}}
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[[Image:Resonator_block.jpg|right|350px]]
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The [[Axe-Fx Ultra]] Resonator is four resonant comb filters in parallel. By tuning the comb filters a metallic or resonant timbre can be achieved from normally non-musical signals. The Resonator works best on transient signals like speech or percussion but can also be used to add unique character to musical inputs.  
  
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===This is a rough description of what a resonator can be:===
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In series with each comb filter is a bandpass filter tuned to the same frequency. The position of these filters can be before or after the comb filters. They are shown in the after position in the diagram above.  
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I'm going to have trouble defining it without using other forms of the word. I also don't know how Cliff implemented it and there's a range of what resonators can accomplish. On the simplest end, it's like a peak EQ that emphasizes a particular frequency (think of how a cabinet is tuned to make certain frequencies kick). Getting more complex, it can be a bit like a reverb, but distinctly not a reverb. This can either give some body to an instrument (like adding the wooden box to a plucked string makes an acoustic, you can build some similar acoustic "simulations" with certain resonators) or just make it sound like you're listening to something through a pipe.
 
  
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Pushing a resonator into less natural territory, it can add clangy metallic overtones or create a noise that approaches feedback or achieves oscillation at a particular (tuned) frequency. For a painful example of the latter, think of what happens when you leave a mic in front of a PA system. With minimal input, it will feedback at a certain frequency based on where the resonances of the system (mic, room, speakers) are. Those resonances can be artificially created by a resonator for some interesting ringing effects (and cut off before they fully feedback/self-oscillate).
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The Resonator can operate in one of two modes: Manual and Chordal. In manual mode control of the filter frequencies is done manually. In chordal mode a base frequency is set and a chord type chosen. The filter frequencies are then set to match the type of chord chosen.
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====Parameters====
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*'''MODE''' - Selects between the two modes of operation: manual and chordal.  
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*'''INGAIN''' - Sets the level into the effect. Since the filters are very resonant overload can occur. This control can be used to reduce the levels.
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*'''MASTER FREQ''' - Scales all the frequencies.
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*'''MASTER LEVEL''' - Scales all the output levels.
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*'''MASTER PAN''' - Scales all the output pans.
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*'''MASTER Q''' - Scales all the bandpass filter Q’s.
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*'''FREQUENCY n''' - Sets the resonant frequency of the selected filter.
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*'''FEEDBACK n''' - Sets the resonance of the selected filter by varying the feedback.
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*'''FILTER LOC n''' - Selects the position of the bandpass for the selected filter.
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*'''FILTER Q n''' - Sets the Q of the selected bandpass filter.
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*'''LEVEL n''' - Sets the output level of the selected filter.
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*'''PAN n''' - Sets the panning of the selected filter.
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{{stub}}
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[[Category:Effect blocks]]

Latest revision as of 17:05, 11 June 2007

[Ultra]

Resonator block.jpg

The Axe-Fx Ultra Resonator is four resonant comb filters in parallel. By tuning the comb filters a metallic or resonant timbre can be achieved from normally non-musical signals. The Resonator works best on transient signals like speech or percussion but can also be used to add unique character to musical inputs.

In series with each comb filter is a bandpass filter tuned to the same frequency. The position of these filters can be before or after the comb filters. They are shown in the after position in the diagram above.

The Resonator can operate in one of two modes: Manual and Chordal. In manual mode control of the filter frequencies is done manually. In chordal mode a base frequency is set and a chord type chosen. The filter frequencies are then set to match the type of chord chosen.

Parameters

  • MODE - Selects between the two modes of operation: manual and chordal.
  • INGAIN - Sets the level into the effect. Since the filters are very resonant overload can occur. This control can be used to reduce the levels.
  • MASTER FREQ - Scales all the frequencies.
  • MASTER LEVEL - Scales all the output levels.
  • MASTER PAN - Scales all the output pans.
  • MASTER Q - Scales all the bandpass filter Q’s.
  • FREQUENCY n - Sets the resonant frequency of the selected filter.
  • FEEDBACK n - Sets the resonance of the selected filter by varying the feedback.
  • FILTER LOC n - Selects the position of the bandpass for the selected filter.
  • FILTER Q n - Sets the Q of the selected bandpass filter.
  • LEVEL n - Sets the output level of the selected filter.
  • PAN n - Sets the panning of the selected filter.


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