Specifications

Chapter 5: DigiRack Real-Time TDM and RTAS Plug-Ins 57
the polarity (phase) of one of them, the signals
will be of opposite polarity and cancel each
other out. This technique is convenient for find-
ing the exact delay setting for any plug-in.
To determine the delay of a plug-in by inverting its
signal phase:
1 Place duplicate audio regions on two different
audio tracks and pan them to the center
(mono).
2 Apply the plug-in whose delay you want to
calculate to the first track, and a Time Adjuster
plug-in to the second track.
3 With TimeAdjuster, invert the phase.
4 Control-drag (Windows) or Command-drag
(Macintosh) to fine-tune delay in one sample in-
crements, or use the up/down arrow keys to
change the delay one sample at a time until the
audio signal disappears.
5 Change the polarity back to normal.
6 Save the TimeAdjuster setting for later use.
Comb-Filter Effect Cancellation
Adjust the delay with the signal in phase until
any comb-filter effects cancel out.
Viewing Channel Delay
Because TDM plug-ins display their delay values
in the Mix window’s channel delay indicators,
this can be used as another method for deter-
mining delay compensation.
To view time delay values and use TimeAdjuster to
compensate for the delay:
1 In the Mix window, Control-click (Windows)
or Command-click (Macintosh) the Track Level
Indicator to toggle between level (that appears
on the display as “vol”), headroom (“pk”), and
channel delay (“dly”) indications. Delay values
are shown in samples.
2 Apply the TimeAdjuster plug-in to the track
whose delay you want to increase, and Control-
click (Windows) or Command-click (Macin-
tosh) its Track Level indicator until the channel
delay value is displayed for that track.
3 Change the delay time in TimeAdjuster by
moving the Delay slider or entering a value in
the Delay field, until the channel delay value
matches that of the first track.
4 Test the delay values by duplicating an audio
track and reversing its phase while compensat-
ing for delay.
Determining the DSP delay of track inserts