The Oscillator
Level Waveform Wave Type Coarse Fine Delay Start
Graphic
Oscillator Screen
The oscillator has many uses in sound testing, as it can zero in on a specific frequency and generate a constant steady tone. For example, the sine wave, having no harmonic content, is very useful in determining distortion in a signal that can cause very apparent changes in tone quality.
Level
Use your mouse to select an output level ranging from off to 0 dB.
Waveform Type
This lets you select the type of waveform to generate as your audio signal. The oscillator can generate Acuma (three harmonics), sine, saw tooth, inverted saw tooth and three ‘square’ waveforms. The default is a sine wave, but you can select other waveforms using the up and down arrows, or by grabbing the graphic and moving it left or right.
Course
With a range of 15.6 Hz to 20.2 kHz, the Course control enables you to
Fine
Once you have selected a Course frequency range, you can use the Fine control to
Tip: A good way to approach this is to set your Fine control to its default (control/ click). Use the Course control to hone in on the frequency, and then use the Fine control to achieve a desired setting. You can save your customized settings using the Save User Preset in the
Delay
You can offset your signal, one sample at a time, by adjusting the Oscillator Delay to add or subtract samples in the right or left channel of your source. Use your mouse to adjust the Delay knob or use the up/down arrows. This is useful for identifying phase problems in your source signals. Once you have identified how much adjustment is needed, you can correct the phase by make adjustments using the D8B Channel Delay.
Tip: Using the Delay feature in Pro Audio Lab does not adjust the delay in your signal. Remember, it’s for identifying a problem only. Use the Channel Delay feature in the D8B to make sample changes.
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User’s Guide