RTA Audio 3.1

RTA Audio

Real-time analyzer with recording and Visualizer module for export.

• Real-time analyzer

The real-time analyzer provides the capability to analyze audio inputs in real time (utilizing built-in microphone or external audio accessories inputs) using Fast Fourier Transform with a selected window function. Additionally, it allows for recording inputs for later offline processing or export.

• Visualizer

The Visualizer module showcases the results of offline audio analysis. By selecting previously captured recordings, users can view graph representations, spectrograms, and waveforms of the audio data. This module offers simple controls for playback, looping, seeking, and adjusting the playback rate of the recording in sync with data presentation during analysis. The export function enables users to share or archive their analysis. The resulting PDF document includes essential recording information, spectrograms, peak & RMS graphs, and frequency table data featuring maximum peaks (with their corresponding timestamps within the recording).

• Features

- Resolution: 1/2 - 1/96 Octave
- Logarithmic frequency scale
- Fixed frequency range: 20 - 20kHz
- Tone scale view C₀- H₈ (A₄ = 440Hz)
- Peak hold graph
- Peak average graph
- RMS average graph
- Pointer (watch) function
- Peak and RMS input meter

• Audio input specification

- Audio session mode: measurement
- Input gain control
- Sample rate: 48000 Hz
- Bit depth: Float32
- Channel: 1 (mono)
- Frequency range: 20Hz - 20kHz
- Dynamic range: -100dB - 0dB

• FFT (Fast Fourier Transform) specification

- Frame size: 8192
- Overlap: 60% to 90%
- Smoothing Window options: Bartlett-Hann, Blackman, Blackman-Harris (default), Blackman-Nuttell, Cosine, Flat Top, Gauss, Hamming, Hann, Lanczos, Nuttall, Rectangular, Triangular
- Hardware acceleration