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Apollo Solo Manual Latency & Apollo Solo 234
Latency & Apollo Solo
Delay Compensation with Apollo Solo
System latency encapsulates all latencies induced within the typical digital audio
workstation environment. See Latency Basics for a detailed overview of where, when, and
how latency (delay) is induced in the DAW environment.
Note: Upsampling latency, input latency, and all other system latencies
are automatically compensated by Console and modern DAWs when delay
compensation is enabled in the host application.
Driver Reporting
Any system latency that is induced by Apollo Solo’s I/O, Console, and/or UAD plug-ins
is reported by Apollo Solo’s device drivers to the host audio software that is using the
device.
The host software (e.g., Console and the DAW) uses this reported device latency for
its automatic delay compensation (ADC) engine. When ADC is enabled in Console and
the DAW, phase coherency (time alignment) is maintained throughout the recording,
overdubbing, and mixing process.
Upsampled UAD Plug-Ins
Some UAD plug-ins are upsampled, meaning their internal sample rate is increased
to achieve sonic design goals. Depending on the session sample rate, upsampled UAD
plug-ins can add additional latency when used in the Console Mixer and/or a DAW.
Although the latency added by upsampled UAD plug-ins is negligible (typically between
0-300 samples, depending on the plug-in and sample rate), this extra latency can affect
phase coherency in a session. However, phase alignment is managed automatically by
Input Delay Compensation in Console and Automatic Delay Compensation in the DAW
when these features are enabled.
Note: Specific upsampling latency values for UAD plug-ins are listed in the UAD
Plug-Ins Manual.
Automatic Delay Compensation in the DAW
Generally speaking, ADC should always remain enabled in the DAW when using Apollo
Solo (and any other audio interface), regardless of whether or not Console is used at the
same time. The DAW’s ADC engine performs all necessary housekeeping to keep tracks
phase-aligned, regardless of the latency source (if any).
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