Verdict: Smaart and REW serve different purposes. Smaart ($895) is the industry standard for real-time live sound system alignment with multi-channel support. REW (free) excels at room acoustics analysis with waterfall plots, RT60, and auto-EQ. They are complementary tools, not competitors. SonaVyx combines both workflows in a single browser-based platform.
Smaart v9 and REW are the two most-discussed audio measurement tools in the industry, but they were designed for fundamentally different workflows. Smaart is built for real-time live sound system alignment during events. REW is built for room acoustics analysis and home theater optimization. Understanding this distinction is essential before choosing between them.
| Feature | Smaart v9 | REW |
|---|---|---|
| Price | $895 one-time | Free (donationware) |
| Platform | Windows / macOS | Windows / macOS / Linux |
| Primary Use Case | Live sound system alignment | Room acoustics analysis |
| Real-Time Transfer Function | ✓ (industry-leading) | ✓ (basic) |
| RTA / Spectrum | ✓ | ✓ |
| RT60 Measurement | ✗ | ✓ (ISO 3382) |
| Waterfall Plot | ✗ | ✓ |
| Room Simulation | ✗ | ✓ |
| Auto-EQ Generation | ✗ | ✓ (miniDSP, Dirac) |
| Multi-Channel (64+) | ✓ | ✗ (2-ch max) |
| API Mode | ✓ | ✗ |
| Hardware Integration | Lake, Dante, BSS | miniDSP, Dirac |
| SPL Meter | ✓ | ✓ |
| Impedance Measurement | ✗ | ✓ |
| STI | ✗ | ✗ |
| Mobile Support | ✗ | ✗ |
| AI Diagnostics | ✗ | ✗ |
Smaart v9 has defined the real-time audio measurement category for over two decades. The software provides dual-channel FFT transfer function with industry-leading trace update speed, enabling engineers to see the effect of system adjustments in real time. Multi-channel support handles up to 64 simultaneous inputs for complex multi-zone PA systems. Deep integration with Lake processors, Dante networks, and BSS controllers enables automated measurement workflows.
Smaart is the tool you reach for during a live event when you need to verify system alignment, check delay times, or diagnose a problem under time pressure. Its real-time performance and reliability in demanding environments are unmatched. However, Smaart lacks room acoustics tools (RT60, waterfall plots, room simulation) and costs $895 before you factor in the required audio interface.
REW (Room EQ Wizard) is the most downloaded free audio measurement software, with hundreds of thousands of users worldwide. REW provides comprehensive room acoustics analysis including RT60 measurement per ISO 3382, waterfall and spectrogram plots, room simulation, and automated EQ generation for miniDSP, Dirac Live, and other DSP platforms. REW runs on Windows, macOS, and Linux.
REW is the tool you use when commissioning a room, optimizing home theater acoustics, or measuring studio response. Its strength is in the analysis phase: generating the data you need to understand room behavior and compute corrections. REW\u2019s real-time transfer function exists but is less polished than Smaart\u2019s for live sound system alignment workflows.
SonaVyx combines the real-time transfer function workflow of Smaart with the room acoustics analysis of REW in a single browser-based platform. SonaVyx adds AI-powered diagnostics that neither Smaart nor REW provides, interpreting measurement data and suggesting specific adjustments. With mobile support, no installation requirement, and a free tier, SonaVyx addresses the gap between these two established tools.
Choose Smaart if: you are a professional live sound engineer who needs real-time system alignment during events, 64+ channel support, Lake/Dante integration, or API Mode for automated measurement workflows.
Choose REW if: you focus on room acoustics, home theater, or studio optimization and need RT60, waterfall plots, room simulation, and auto-EQ generation on a desktop platform for free.
Choose SonaVyx if: you want both real-time transfer function and room acoustics in one tool, with AI diagnostics, mobile measurement, and a free browser-based platform that requires no installation.
Use both Smaart + REW if: you do both live sound and room analysis and want the established, proven tools for each domain. Many professionals pair these tools, using Smaart at FOH and REW for commissioning.
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