Best Free Audio Measurement Software 2026
Feature Comparison
| Feature | SonaVyx | REW | Open Sound Meter | ARTA | CARMA |
|---|---|---|---|---|---|
| Real-Time Analyzer | Yes (1/1–1/24 oct) | Yes (1/3 oct) | No | Yes | No |
| Transfer Function | Yes (H1, coherence) | Yes | Yes | Yes | Yes |
| Impulse Response | Yes (sweep + MLS) | Yes (sweep) | No | Yes | Yes |
| RT60 / ISO 3382 | Yes (T20, T30, EDT) | Yes | No | Yes | Yes |
| STI / IEC 60268-16 | Yes (STIPA) | No | No | No | No |
| SPL Meter | Yes (A/C/Z, Leq) | Yes (basic) | No | No | No |
| Export Formats | CSV, FRD, WAV, JSON | CSV, TXT, WAV | CSV, TXT | CSV, WAV | WAV |
| AI Diagnostics | Yes (Claude API) | No | No | No | No |
| Cloud / Venue History | Yes | No | No | No | No |
| Platform | Any browser | Windows/Mac/Linux | Windows/Mac/Linux | Windows | iOS/Android |
| Standards Compliance | IEC 61672, ISO 3382, IEC 60268 | Partial | No | IEC 61672 | No |
| Real-Time Processing | Yes (Rust WASM) | Java | C++ | C++ | Native |
| Mobile Support | Yes (responsive PWA) | No | No | No | Yes |
| Pricing | Free (Pro $29/mo) | Free | Free | Free | Free |
| Ease of Use | Guided workflows | Moderate | Simple | Complex | Simple |
SonaVyx: The Browser-Native Contender
SonaVyx is the only tool in this comparison that runs entirely in a web browser with no installation. Built on Rust compiled to WebAssembly, it delivers native-speed DSP directly in Chrome, Firefox, or Safari. The free tier includes RTA, transfer function, impulse response, RT60, STI, and SPL measurement with no artificial feature locks on measurement accuracy. AI-powered diagnostics analyze your measurements and provide actionable recommendations, a capability no other free tool offers.
REW: The Desktop Standard
Room EQ Wizard remains the gold standard for desktop room acoustics measurement. Its parametric EQ optimizer, waterfall plots, and extensive room correction features are unmatched for home theater and studio tuning. REW requires Java and a desktop OS, which limits portability. It lacks real-time AI analysis, cloud venue management, and STI measurement.
Open Sound Meter: Lightweight Transfer Function
OSM is a focused transfer function tool with a clean interface. It excels at quick system alignment checks but lacks the breadth of measurement types found in SonaVyx or REW. No RT60, no SPL logging, no export beyond basic formats. Best for sound engineers who need a fast, single-purpose alignment tool.
ARTA: Windows Powerhouse
ARTA offers deep measurement capabilities including speaker testing, impedance measurement, and stepped sine analysis. Its Windows-only requirement and steeper learning curve limit accessibility, but for loudspeaker designers and lab environments it remains a formidable option.
CARMA: Mobile Measurement
NTi Audio CARMA brings impulse response and frequency response measurement to phones and tablets. It pairs with NTi hardware for calibrated results. Limited to basic measurements without real-time analysis or advanced acoustics features. Best suited for quick field checks with NTi microphones.
Choose the Right Tool
- Choose SonaVyx if you want zero-install browser measurement with AI diagnostics, STI, and cloud venue management.
- Choose REW if you need desktop room correction optimization with parametric EQ design.
- Choose Open Sound Meter if you need a lightweight transfer function tool for quick alignment.
- Choose ARTA if you do loudspeaker design on Windows and need impedance measurement.
- Choose CARMA if you already own NTi measurement hardware and need mobile IR capture.
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