UAD Powered Plug-Ins Manual v5.2 - Just Music

PMB Group/Bus
Examples
Situation: You have a session with bass, drums, piano, and 2 vocal tracks.
The session is running at 44.1kHz and your I/O buffer is set to 512 samples.
You want to tighten up the rhythm section so you put the bass, drum, and piano
tracks on a group/bus and apply one instance of Precision Multiband to
the rhythm section group/bus. Result: The rhythm section plays late in relation
to the vocal tracks.
Solution: Send the output of the vocal tracks (but not the rhythm tracks or the
Precision Multiband return) to a different group/bus. Then enter the numbers
into the formula:
15,360 ÷ 1,024 = 15
Now put one DelayComp with a Plugs value of 10, and another DelayComp
with a Plugs value of 5 on the group/bus that contains the vocal tracks. The
latency of both groups/buses is now the same, so the playback timing is correctly
aligned.
Here’s another example with the same track setup, but with a session sample
rate of 48kHz and an I/O buffer size of 1024 samples. Use the formula to arrive:
16,896 ÷ 2048 = 8.25
When a non-whole number results from the formula, the Samples parameter
must be used in addition to the Plugs parameter. The Samples value to use is
the fraction (in this case 0.25) times the UAD latency (from the UAD System
Info window, in this case 2048). Therefore in this example, the total Samples
value is 512. To finish the example:
Insert one DelayComp with a Plugs value of 8 and a Samples value of 128,
and three more DelayComps with a Plugs value of 0 and a Samples value of
128 each on the group/bus that contains the vocal tracks. The four Samples
values sum to 512 samples, which is 0.25 of one Plugs value (2048 x .25 =
512). The latency of both groups/buses is now the same, so the playback timing
is correctly aligned.
Note: You can keep it simple: Use the Precision Multiband only on outputs
(as its design was intended), or only in hosts that have full plug-in delay compensation!
UAD Powered Plug-Ins Manual - 100 - Chapter 9: UAD Delay Compensation