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IIR z Plane |
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The IIR z plane allows mouse control of the pole and zero for a biquad filter.
The graphic shows the z plane with a pole (X) and zero (O) control. |
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Pins:
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| X | input | required to operate |
| A | attenuation | input | optional, default = 1.0 |
| Y | Output |
Controls:
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| O Zero control |
| X Pole control |
Keyboard and Context menu:
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| del | delete the object |
Default State:
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| as shown |
| internal values reset to zero at play start. |
Notes:
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| The graphic shows the z plane with the unit circle.
0Hz is at 3 o'clock, 11025 Hz is at noon, and 22050 Hz at 9 o'clock.
The unit circle shows where the filter will break into oscillation.
| | Moving the pole or zero control will change the filter coefficients.
The locations are interpolated accross sample frames. |
| To prevent saturation, this object clips the output at ±1.0. Use attenuation to prevent this. |
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