Smaart Live is a professional audio analysis and metering software widely used in live sound, installation, and broadcast applications. A very useful feature in Smaart Live for ensuring high-quality audio and for troubleshooting audio issues is the Phase Meter.
The Phase Meter in Smaart Live allows users to analyze the phase relationship between two audio signals. This is crucial for several reasons:
Sound Quality: Proper phase alignment between channels is essential for achieving clear, coherent sound. When signals are out of phase, they can partially cancel each other out, leading to a thin or hollow sound.
Preventing Comb Filtering: When two signals are mixed that are slightly out of phase, comb filtering can occur. This results in a series of notches in the frequency response, which can significantly degrade sound quality.
Accurate Sound System Alignment: In large sound systems or when using delay lines, ensuring that the sound from different speakers arrives at the listening position at the correct time is crucial. The phase meter helps in aligning these signals accurately.
Smaart Suite (Full-Version) remains the gold standard because it provides causal analysis (why a system sounds bad) rather than merely descriptive analysis (that it sounds bad). Its ability to overlay live phase traces, coherence, and magnitude on a single graph allows engineers to distinguish between a loudspeaker problem and a room acoustics problem—a distinction that separates amateur mixing from professional system alignment.
While competitors like Open Sound Meter (OSM) offer free dual-FFT, and Rational Acoustics' own Smaart v.9 has introduced a modernized UI, the Full-Version’s stability under 96kHz operation, unlimited channel count, and industry-standard data export (Smaart Data Exchange) ensure it remains the non-negotiable tool for any engineer who signs their name to a PA.
Smaart Suite (v9) is the comprehensive, full-featured flagship edition of Rational Acoustics' industry-standard acoustic measurement and analysis software. It is the modern equivalent of Smaart v8, designed for professional audio engineers who require no functional limitations across all measurement domains. Core Measurement Modes
Smaart Suite integrates three distinct, high-powered measurement modes into a single interface:
Real-Time Mode: The core engine used for live sound system alignment.
Spectrum (RTA & Spectrograph): Provides single-channel frequency analysis with up to 1/48th octave resolution.
Transfer Function: Enables dual-channel comparisons between a reference signal and a measurement microphone to analyze magnitude, phase, and coherence. Smaart Live Full- Version
Impulse Response (IR) Mode: Focuses on the time domain, essential for room acoustics and architectural analysis.
Calculates critical acoustic metrics like RT60 (reverberation time) and speech intelligibility indices (STI, STIPA, CIS).
SPL (Sound Pressure Level) Mode: A robust solution for monitoring, logging, and reporting sound levels.
Supports unlimited calibrated inputs, custom alarms, and remote web-browser viewing. Key Professional Features
Source-Independent Analysis: While pink noise is common, Smaart can use any broadband signal, including music, for measurements.
Multi-Engine Capability: Supports unlimited simultaneous measurement engines, allowing engineers to compare multiple mic positions in real time.
Multi-Output Signal Generator: Features a new multi-device, multi-output generator with independent trim and presets.
Cross-Platform Architecture: Unified 64-bit codebase with native support for Apple Silicon and modern Windows systems. Minimum System Requirements
The software operates on both Windows and macOS with identical functionality. Smaart Home - Rational Acoustics
Smaart (System Measurement Acoustic Analysis Real-time Tool) is the industry-standard software used by audio engineers to analyze and optimize sound systems full-version , currently known as Smaart Suite (v9)
, is a multi-channel flagship platform that includes all of Smaart's powerful measurement capabilities with no functional limitations. Key Measurement Modes Smaart Live is a professional audio analysis and
Smaart Suite integrates three distinct measurement modes into a single interface: Real-Time Mode: Features single-channel
(RTA and Spectrograph) for identifying frequency content and dual-channel Transfer Function
(Magnitude, Phase, and Coherence) to see how a sound system changes a signal from input to output. Impulse Response (IR) Mode:
Analyzes system response in the time domain. It is used to examine room acoustics, reverb times (RT60), and intelligibility metrics like STI and Clarity.
A dedicated environment for monitoring, logging, and reporting sound pressure levels. It includes advanced features like SPL compensation to monitor levels at a different location than the microphone. Technical Specifications Smaart Suite (v9) Perpetual - Rational Acoustics
The current full-featured version of Smaart is Smaart Suite (v9) [19, 28]. This "flagship" edition includes all three industry-standard measurement modes: Real-Time, Impulse Response, and SPL [19]. 🚀 Key Versions of Smaart v9
Rational Acoustics offers different editions depending on your specific needs:
Smaart Suite: The complete package with no functional limitations [19].
Smaart RT: Focused strictly on Real-Time mode (Spectrum and Transfer Function); lacks IR and full SPL modes [21, 34].
Smaart LE: A streamlined "Light" version of Real-Time mode with fixed settings, ideal for essential day-to-day measurements [8, 34].
Smaart SPL: A standalone edition purely for Sound Pressure Level monitoring, logging, and reporting [13, 28]. Pricing & Licensing Sound Quality: Proper phase alignment between channels is
Pricing varies based on whether you are buying a new license or upgrading from an older version (like v8 or Di v2) [24]: Smaart Suite (New License): $1,299 [24].
Smaart Suite (Upgrade): From $399 to $499 depending on current sale prices [24, 29].
Subscription Options: Annual or monthly subscriptions are available for those who prefer not to buy a perpetual license [19, 21].
💡 Pro Tip: If you want to try before you buy, you can download a 30-day demo for Suite, LE, or SPL from the Rational Acoustics Demo Page [23]. 🛠️ Latest Updates As of April 2026, the most recent software updates include:
Smaart v9.6: Features major improvements to the SPL module, including an SPL compensation function and docked meter stacks [5.1, 5.6].
Smaart v9.5: Added a Media Player for internal file playback and "Target Curve Tolerance" for visual feedback during EQ [5.2, 5.11].
Smaart Suite (v9) is the full-featured, flagship "full version" of the Smaart acoustic test and measurement software. It includes all three industry-standard measurement modes—Real-Time, Impulse Response, and SPL—with no functional limitations. Dr. Rajesh Khade Key Features and Capabilities
Smaart Suite combines three operational modes to offer a complete, unrestricted, and comprehensive toolset for audio engineers: Real-Time Mode
: Features Spectrum (RTA/Spectrograph) and Transfer Function (Phase/Magnitude/Coherence) analysis for system optimization. Impulse Response (IR) Mode
: Facilitates time-domain analysis, providing ETC, linear, and log views, along with advanced metrics like RT60 and STI.
: Delivers comprehensive monitoring, logging, and reporting capabilities for sound pressure levels, including customizable alarms. Rational Acoustics
Compared to lower-tier versions, the Suite offers advanced, exclusive benefits, such as full IR mode, advanced SPL logging, high-resolution FFT settings, and a dedicated Client Window. Rational Acoustics Smaart Suite Overview - Rational Acoustics