Omnissiah review
A focused £59 room-correction tool for stereo systems and Tantrum DSP hardware.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Omnissiah is Tantrum Audio’s desktop application for room correction and speaker calibration. It uses a measurement microphone and audio interface to capture room response, identify problematic frequencies, calculate corrective EQ and align speaker and subwoofer timing. Corrections can run live through the computer or be written to compatible Tantrum DSP hardware. The software supports macOS and Windows, with macOS 11 or later stated as the primary requirement and Windows listed as beta. It is aimed at solo, small and mid-market users who need stereo monitoring calibration.
The published pricing shows one Full Licence at £59 GBP as a one-time payment, with room correction, speaker calibration, realtime measurement, automatic room EQ and future updates included. A guided measurement workflow leads into selectable or custom target curves, while diagnostics identify issues that may need acoustic treatment rather than more EQ. Automatic filter calculation, before/after comparison and calibration backup and restore make the correction process easier to review and preserve. Support channels include tickets, documentation and email, and the stated refund period is 30 days.
Omnissiah’s strongest differentiator is its native control surface for Tantrum DSP hardware, covering gain, delay, crossover, polarity and parametric EQ alongside speaker, subwoofer and main time/phase alignment. That integration suits users building a Tantrum-based monitoring setup, while the software can also work with other speaker systems and measurement microphones for correction tasks. Its scope remains stereo, and it does not provide convolution correction or AI features. Choose it for focused desktop room calibration at a single upfront price; users needing broader multichannel correction or hardware ecosystems beyond Tantrum DSP should consider a different tool.
Omnissiah pros and cons
- Where it wins
- Guided microphone measurement with realtime frequency and phase analysis
- Automatic EQ, target curves, diagnostics and before/after comparison
- Direct gain, delay, crossover and EQ control for Tantrum DSP hardware
- Where it doesn't
- Correction scope is limited to stereo systems
- Windows support is listed as beta
- Deep hardware controls are specific to compatible Tantrum DSP units
Omnissiah fact sheet, pricing and score →
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