![](../../images/calibration.jpg)
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Select [AUDIO]
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Set [FREQUENCY] to maximum
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Set [RESONANCE] to '5'
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Set [CV POLARITY] to ‘0’ and [INPUT] to maximum
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Adjust P101 fully anticlockwise
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Patch a 12Hz 5VDC p-p the square wave in to [INPUT]
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Monitor the [BANDPASS] output
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Increase [RESONANCE] until the filter starts to ring
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Adjust P101 for a frequency of 19kHz. You may need to slightly increase the [RESONANCE] to maximize the duration of the ringing waveform
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![](es07-pulse.jpg)
Step 7 - ES08 Ringing
![](es07-sine.jpg)
Step 9 - Tuning to ~19kHz |