User Manual

UAD Powered Plug-Ins Manual - 97 - Chapter 9: UAD Delay Compensation
Upsampled Compensation Examples
Group/Bus
Example
Situation: You have a session at 44.1kHz with bass, drums, guitar, and 2 vo-
cal tracks. You want a fat, warm vocal blend so you put both vocal tracks on
a group/bus and apply one instance of UAD Helios 69 to the vocal bus. Re-
sult: The vocal tracks play late in relation to the instrument tracks.
• Solution: Send the output of the unprocessed instrument tracks (but not the
vocal tracks or the Pultec return) to a different group/bus, and put one De-
layComp with a Plugs value of 1 and a Samples value of 31 (the 44.1kHz
value for Helios 69 from Table 7) on this group/bus that contains the dry
non-vocal tracks. If you put 2 Helios 69’s stacked in series on the vocal bus,
the unprocessed bus DelayComp plug-in value would be 2, and the Sam-
ples value would be 62.
Compensating
Precision
Multiband
The Precision Multiband (PMB) has a significantly larger latency than other
upsampled plug-ins because of the linear reconstruction of the filter bank.
Because manually compensating for Precision Multiband latency in hosts that
don’t support full plug-in delay compensation can be complicated, to avoid
timing errors in these hosts we generally recommend using Precision Multi-
band only on outputs, so no manual compensation is required.
The PMB
Formula
To manually compensate for Precision Multiband latency when used on
groups/buses in hosts that don’t support full PDC, use the following formula:
L1 ÷ L2 = UAD DelayComp(s) value
Where “L1” is the Precision Multiband latency from Table 7, and “L2” is the
latency from the UAD Control Panel System Information window (note that at
least one UAD plug-in must be running in the host to obtain a valid value).
This formula will arrive at the DelayComp Plugs parameter value (whole num-
ber result), or Plugs plus Samples value (non-whole number result) needed for
compensation. Since the maximum Plugs/Samples value in one DelayComp
instance is 10/128, more than one DelayComp instance will be required (in
series) if the Plugs/Samples value exceeds 10/128, which can happen at
lower buffer sizes and/or higher sample rates.