Here's what you need to set up your audio hardware chain to enable Spatial experiences:
- Mac computer(s) to run Spatial Reality.
Spatial Reality runs on any modern Mac hardware (make sure to review the minimum requirements). You can group multiple computers together to increase your total compute power and drive more channels. The computers work together to keep the timing in sync.
- Multichannel audio interface.
USB, Thunderbolt, virtual soundcard, AVB, Dante or AES67.
To render lifelike sound, each speaker must be individually addressable by Spatial Reality. Speakers can be active, or passive with separate amplification.
Channel verification and amplitude matching:
- Connect your audio interface to your computer.
- Connect you speakers (or the amplifier powering the speakers) to your audio interface, and assign the channels. If you are using a virtual soundcard — make sure you have correctly routed the virtual channels to your audio hardware.
- Test every speaker channel to verify that the channel number corresponds to the correct physical speaker.
- Important tip: Make sure that the SPL level of each speaker is matched. The process of amplitude matching ensures that Spatial Reality can accurately render sound in this Space.
To amplitude match:
- Using a DAW — target each speaker channel and play a known pink noise source (preferably -20dB RMS)
- Using a dB meter, measure the SPL output of each speaker 1m in front of the speaker.
- Using the same target loudness for each speaker (84dB–96dB depending on your Space and hardware), adjust the loudness either through the physical volume control for you speaker or amplifier, or through your audio interface settings.
- Repeat the process for each speaker in your Space.