User’s Guide
The Oscillator
The oscillator has many uses in sound testing, as it can zero in on a speci c fre-
quency 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.
Use your mouse to select an output level ranging from off to 0 dB.
This lets you select the type of waveform to generate as your audio signal. The oscil-
lator 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 wave-
forms using the up and down arrows, or by grabbing the graphic and moving it left or
With a range of 15.6 Hz to 20.2 kHz, the Course control enables you to “ball-park” a
particular frequency range, prior to using the Fine control.
Once you have selected a Course frequency range, you can use the Fine control to
ne-tune your frequency to an exact setting.
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 drop-down menu.
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 identi ed how much adjust-
ment is needed, you can correct the phase by make adjustments using the D8B
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.
Left-click to start the Oscillator, click again to stop. Right-click to play a momentary
tone burst for as long as you hold down the button.
