WaveCapture Announces Live-Capture Pro Comprehensive Audio Analysis Tool

The new WaveCapture Live-Capture Pro is a PC-based software tool for real-time live sound measurements, optimized for front of house use.

Up to eight channels of time and frequency domain are measured simultaneously using program material (music and speech), before or during a performance, with the audience present. Live-Capture Pro also employs traditional MLS and Chirp measurements.

The full suite of features includes room-resonance detection in real time, delay finder with group delay and Cepstrum analysis, filter optimization, sound level logging and display of reverberation time graphs.

Live-Capture Pro also acquires complex frequency response data by applying either a maximum-length sequence (MLS) stimulus, Sweep Tone (time-domain chirp) or Dual FFT (using external Wavefiles) to the loudspeaker or sound reinforcement system under test.

And, it offers a multi-channel Real Time Analyzer with up to 1/48 octave resolution.

Sophisticated windowing functions allow the user to mask out room reflections and focus on either equalizing the direct sound (while retaining low frequency resolution) or on spatial averaging of the room transfer function.

• Real time Magnitude, Phase, Group Delay, PIR, ETC and Cepstrum displays
• MLS (up to 4096k points), Log Sine Sweep (Chirp) and Dual FFT (with external WAV files)
• Up to 8 channels simultaneously
• Displays both frequency and time domain at high refresh rates in real time
• Complex coherence display including phase stability
• Multiple time windowing for room reflection suppression
• Analyzing tools include; Delay finder, Filter Optimizer, LEQ log and LEQ logging, and Reverberation Time
• Curve Manager holds up to 16 captured measurements
• Noise, Sine and Multi-tone generator
• Spectrum and THD analyzer
• SPL histogram with LEQ logging according to IEC 61672 standard

For room tuning and sound reinforcement system optimization, Live-Capture Pro supports spatial averaging. This allows the user to perform multiple measurements throughout the coverage pattern of the sound reinforcement system and base system equalization on the weighted, spatially-averaged response.

The novel Automatic Room Mode finder, with its automatic calculation of parametric equalization, remedies dominant room modes. The Room Mode finder can also run in real time and track room modes.

Any captured transfer functions can be run trough an optimization algorithm and produce a list of parametric equalization parameters (Frequency, Q and Gain) to fit the curve. For further optimization, eq parameters can be manually fine-tuned using a convenient graphical user interface.

The Auto Delay updater will facilitate the selection of microphone position and compensate for the time variance between positions.

A Developer’s Dit is available for Live-Capture Pro measurement integration with DSP controller software.

Real time measurement data such as curves from RTA, Transfer function (magnitude, phase, group delay, impulse response etc.) and other data parameters can be presented in the filter design window of most DSP based loudspeaker processors. The measured curves give a real time guide for the operator on adjusting the filters. Measurement system settings can also be adjusted from the DSP controller software.

The Live-Capture measurement software can either run on the same PC as the controller software or remote over LAN. The integration kit includes a communication engine, supporting multiple NICs.

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Live-Capture Pro uses threaded computing to acquire impulse responses between 0.35 to 11 seconds and then applies suitably large FFTs to display time domain and frequency domain data at a maximum 23.4 frames-per-second refresh rate.

Advanced complex averaging is used in both domains, taking the coherence and phase stability into account. The default resolution is 96 points per octave with a resolution of up to 192 points per octave available.

WaveCapture Website

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