Professional audio measurement tools that run in your browser. Start free, upgrade when you need AI diagnostics and unlimited features.
Professional measurement tools at zero cost
Full suite with AI diagnostics and unlimited access
Custom solutions for teams and organizations
The free plan gives you access to professional-grade measurement tools including an IEC 61672 Class 2 SPL meter with A/C/Z weighting, real-time FFT spectrum analyzer, up to 3 RT60 reverberation measurements per day, basic acoustic problem detection, 2-phone measurement sessions, and CSV data export. No credit card required.
Yes, you can cancel your Pro subscription at any time. Your Pro features will remain active until the end of your current billing period. After cancellation, your account reverts to the free plan and you retain access to all your measurement data.
We use Paddle as our payment processor, which supports credit/debit cards (Visa, Mastercard, American Express), PayPal, Apple Pay, Google Pay, and wire transfer for annual plans. Paddle handles all tax compliance including VAT/GST automatically based on your location.
Smaart by Rational Acoustics costs $899 for a perpetual license and requires a laptop with an audio interface. REW (Room EQ Wizard) is free but desktop-only and requires technical expertise. SonaVyx runs entirely in your browser with no installation, supports multi-device measurement via your phones, includes AI-powered diagnostics, and starts at $0/month. Pro is $29/month for the full suite.
Professional audio measurement has traditionally required expensive software and dedicated hardware. Smaart by Rational Acoustics, the industry standard for live sound system alignment, costs $899 for a perpetual license (Smaart v9). It requires a Windows or Mac laptop, a multi-channel audio interface ($200-$1,500), and measurement microphones ($100-$500 each). While Smaart is undeniably powerful, the total cost of entry exceeds $1,200 for even a basic setup, placing professional transfer function analysis out of reach for many sound engineers, especially those in developing markets.
REW (Room EQ Wizard) by John Mulcahy is a free, donation-supported desktop application that has earned a devoted following in the home theater and studio acoustics community. REW offers excellent room mode analysis, waterfall plots, and EQ optimization. However, REW is desktop-only (Java-based), requires significant technical knowledge to operate effectively, and lacks real-time dual-channel transfer function measurement suitable for live sound system alignment.
SonaVyx takes a fundamentally different approach: the measurement engine runs entirely in your web browser using Rust compiled to WebAssembly, delivering near-native DSP performance without any software installation. Your smartphone becomes the measurement microphone, connected to a second device via WebSocket over your local network. This eliminates the need for dedicated audio interfaces and measurement laptops.
The free tier includes tools that would cost hundreds of dollars in traditional software: an IEC 61672 Class 2 SPL meter with A/C/Z weighting and statistical analysis (L10/L50/L90), real-time FFT spectrum analysis powered by a Rust WASM engine, RT60 reverberation time measurement via Schroeder backward integration, and basic acoustic problem detection. These tools are available at zero cost, forever, with no credit card required.
SonaVyx Pro at $29/month (or $290/year, saving $58) unlocks the full platform: AI-powered diagnostics, unlimited equipment scans, before/after comparison, full export suite including PDF reports and WAV impulse response files, session history with cloud storage, and branded measurement reports you can deliver to clients.