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+TAP-plugins +Tom's Audio Processing plugins +for audio engineering on the Linux +platform + |
+ + |
+[ TAP AutoPanner ] +[ TAP Chorus/Flanger ] +[ TAP DeEsser ] +[ TAP Dynamics (Mono & Stereo) ] +[ TAP Equalizer and TAP Equalizer/BW ] +[ TAP Fractal Doubler ] +[ TAP Pink/Fractal Noise ] +[ TAP Pitch Shifter ] +[ TAP Reflector ] +[ TAP Reverberator ] +[ TAP Rotary Speaker ] +[ TAP Scaling Limiter ] +[ TAP Sigmoid Booster ] +[ TAP Stereo Echo ] +[ TAP Tremolo ] +[ TAP TubeWarmth ] +[ TAP Vibrato ] ++ +
![[TAP Rotary Speaker GUI as shown in Ardour]](tap_rotspeak.png)
++This plugin simulates the sound of rotating speakers. Two pairs of +rotating speakers are simulated, each pair fixed on a vertical axis, +with their horns spreading the sound in opposite directions. The two +pairs of speakers are rotating with different revolutions +(frequencies). The incoming sound is split into a low and a high part +(with a low-pass and a high-pass filter, using a crossover frequency +of 1 kHz). The low part is fed into the "Rotor" pair of speakers, and +the high part into the "Horn" pair. A pair of horizontally aligned +microphones is used to pick up the resulting sound. The distance of +the microphones (the width of the stereo image of the effect) is +adjustable. +
+ +| Unique ID | 2149 | +
|---|---|
| I/O ports | 2 inputs / 2 outputs | +
| CPU usage (44.1 kHz) | 8.5% | +
| CPU usage (96 kHz) | 19% | +
| Hard RT Capable | Yes |
| In-place operation | Supported | +
| run_adding() function | Provided | +
+For every speaker pair, two physical effects are simulated. First, in +the situation when one speaker is behind the other one (from our point +of view), the speaker that is behind has lower volume (because of the +distance), the one in front of us has higher volume. At this moment, +the speakers have no velocity in our direction, so no pitch shift is +perceived. Second, when the two speakers are at the same distance from +us (after a 90 degree turn), they have the greatest velocity in our +direction. One is rolling away, resulting in its pitch lowering caused +by the Doppler effect. The other one is coming near, so its pitch will +be perceived to be higher. +
++To set the rotating speed of the "Rotor" and the "Horn" pair of +speakers, use the "Rotor Frequency" and "Horn Frequency" +controls. Remember that sounds under 1 kHz will be fed (mostly) into +the "Rotor" pair, and sounds higher than 1 kHz will go (mostly) into +the "Horn" pair. You can adjust the stereo width of the effect via +the "Mic Distance" control. The higher this setting, the wider the +stereo image will be. Finally, you may adjust the mix of sounds coming +from the "Horn" and "Rotor" parts with the "Rotor/Horn Mix" +control. At a setting of zero, only the sound coming from the "Rotor" +is heard; when set to 1, only the "Horn" sound is heard. The default +setting of 0.5 yields an equal mix of "Rotor" and "Horn" sounds. +
++The settings shown in the above screenshot should provide a good +starting point for your own experimentation. +
+ + + +| name | min. value | default value | max. value |
|---|---|---|---|
| Rotor Frequency [Hz] | +0 | +0 | +30 |
| Horn Frequency [Hz] | +0 | +0 | +30 |
| Mic Distance [%] | +0 | +25 | +100 |
| Rotor/Horn Mix | +0 | +0.5 | +1 |
| latency | +latency time is 48 ms, +value depends on sample rate | ||
+Rotary speaker effects usually deal with the finite mass of real +speakers, so when the user changes a speed setting, gradual +acceleration of the corresponding speaker pair is simulated. TAP +Rotary Speaker does not implement this, because if needed, this effect +can easily be produced on a mix using Ardour automation. +
+ + +