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Chapter 15 Utilities and tools 270
Test Oscillator
Test Oscillator is useful for tuning studio equipment and instruments and can be inserted as both
an instrument or eect plug-in. It operates in two modes, generating either a static frequency or
a sine sweep.
In the rst mode, which is the default mode, it starts generating the test signal as soon as it is
inserted. You can switch it o by bypassing it. In the second mode, which is activated by clicking
the Sine Sweep button, Test Oscillator generates a user-dened frequency spectrum tone sweep
when triggered with the Trigger button.
Test Oscillator parameters
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Waveform buttons: Select the waveform to use for test tone generation. The Square Wave and
Needle Pulse waveforms are available as either aliased or anti-aliased versions—the latter
when used in conjunction with the Anti Aliased button; the Needle Pulse waveform is a single
needle impulse waveform.
Note: The Waveform buttons are disabled when the Sine Sweep button is turned on.
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Frequency knob and eld: Rotate to set the frequency of the oscillator (the default is 1 kHz).
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Sine Sweep button: Turn on to generate a sine wave sweep of the frequency spectrum you set
with the Start Freq and End Freq elds.
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Time eld: Drag to set the duration of the sine wave sweep.
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Start Freq(uency) and End Freq(uency) elds: Drag to set the oscillator frequency for the
beginning and end of the sine sweep.
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Sweep Mode pop-up menu (Extended Parameters area): Choose a type of sweep curve—Linear
or Logarithmic.
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Trigger button: Turn on to start the sine sweep.
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Trigger pop-up menu: Choose the sine sweep mode:
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Single: Triggers the sweep once.
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Continuous: Triggers the sweep indenitely.
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Level slider and eld: Drag to set the overall output level.