Surround sound is multi-channel audio output that expands on the basic two-channel stereo format. Surround sound with Apollo X is a hardware and software operating mode that is configured within Console. When enabled, Apollo X and Console output features are optimized for the surround environment.
Note: Surround functionality is available only with Apollo X Rack interfaces.
Surround sound functionality for Apollo X Rack audio interfaces is available in UAD v9.7.1 and higher.
All surround sound functionality for Apollo X Rack audio interfaces is documented in the Apollo X Surround Sound chapter within the Apollo Software Manual - Thunderbolt.pdf file.
This manual file is placed on the startup drive during UAD installation. To access installed documentation, either click the Product Manuals button in the Help panel within the UAD Meter & Control Panel application, or choose Documentation from the Help menu within the Console application.
To download the Apollo Software Manual, visit the UA Product Manuals article.
Surround Calibration Audio Files
The Apollo X Surround Sound chapter within the Apollo Software Manual - Thunderbolt.pdf includes a surround monitor calibration procedure. This procedure uses calibrated digital audio source files that are played from within a surround-capable DAW while volume is measured with an external SPL meter.
The audio files referenced in the monitor calibration procedure can be downloaded by clicking the link below. The download includes two mono files at 48 kHz:
- 500-2500 Hz pink noise @ -20 dBFS.wav
- 40-80 Hz pink noise @ -20 dBFS.wav