This is the shortest path from a boxed device to corrected sound. Each step points to a fuller chapter if you want detail. Set aside about 15 minutes for the room correction part, and have your measurement microphone ready.
The whole flow at a glance
- 1Connect your device over USB-C.
- 2Update its firmware if the app asks.
- 3Set your input (mic) and output (speaker) devices.
- 4Measure the room with Quick Measurement.
- 5Review the results, then apply them to the device.
1. Connect your device
- 1Power on your Really Mean Sub.
- 2Connect it to your Mac with a USB-C cable.
- 3In Omnissiah's sidebar, under Devices, your device appears within a second or two. Until it does, the app shows “No devices found…” with “Please connect your device via USB-C cable to your computer.”
More detail: Chapter 5 — Managing devices.
2. Update firmware if prompted
If the device's firmware is older than the version bundled with the app, a full-screen FIRMWARE UPDATE REQUIRED message blocks the app until you update.
- 1Click Update to v… next to the device.
- 2Confirm.
- 3Wait — the bar shows progress. Do not turn off the device. It restarts on its own when done.
3. Choose your microphone and speaker output
Omnissiah needs to know which mic to record from and which output plays the test signals.
- 1Go to Settings (gear, bottom of the sidebar), then the Audio tab.
- 2Under Measurement Mic, pick your microphone, then its channel.
- 3Under Speaker Output, pick the output device that feeds your speakers.
- 4Raise the mic input until the Mic Level meter shows healthy level (green), without clipping (red).
4. Measure your room
- 1Click Calibrate in the sidebar.
- 2On Configure Your Measurement, keep Quick Measurement selected.
- 3Under System, confirm your speaker layout (e.g. Left + Right + Subwoofer) and that each speaker is assigned to an output.
- 4Click Start Measurement.
- 5In the Speaker Playback About to Begin dialog, follow the level-setting instructions, then click I'm Ready 🤘.
- 6Keep the mic at head height at your main listening position and stay quiet while it plays test noise through each speaker. A quick measurement takes one measurement per speaker by default, so you won't need to move the mic — if you've set more positions, the app pauses and tells you when to move it a few centimetres.
Test noise can be loud. Set your volume low first and raise it only until the on-screen meter turns green.
5. Review and apply
When measurement finishes, the app calculates correction and shows the Calibration results page.
- 1Use the Before / After toggle to hear and see the difference.
- 2Read any Diagnostics cards — they explain anything the correction couldn't fix and what to do about it.
- 3When you're happy, click Apply to device, then confirm.
The correction is now stored on the device and active.
6. Back up your work
Once you like the result, save it: click the camera button next to Devices in the sidebar, then Back Up… and choose where to save the file. The same Back up… and Restore… buttons also live at the bottom of the Settings screen.
That's it
Your system is measured, corrected and applied. From here you can fine-tune levels and EQ by hand (Chapter 7 — Shaping sound), try a different tonal balance (Chapter 14 — Custom target curves), or learn what every screen does (Chapter 4 — Interface tour).
