Simple Audio Sweeper

Simple Audio Sweeper is a technical tool for acoustic measurements. The program generates specific audio frequencies and analyzes the frequency response of audio systems using a microphone and speakers.

★★★★★

4.3(3 ratings)

• Specific frequency generation. The program produces audio tones at exact frequencies selected by the user. This function is used for spot testing of audio components and verification of playback in particular frequency bands.
• Automatic frequency sweep. It runs an automated sequence of tones across the audio spectrum. The sweep progresses from low to high frequencies with controlled time intervals for systematic measurements.
• Frequency response graph. It visualizes the response curve of the measured audio system. The graph shows relative amplitude at different frequencies, identifying peaks, dips, and roll-offs in the response.
• Export results to image. Saves the generated graphs in standard image formats. This function allows documenting measurements for technical reports or later comparisons.
• Export data to CSV. Saves the numerical values of the measurements in comma-delimited text files. The exported data can be processed in analysis software or spreadsheets.
• Import CSV files. Loads previous measurement data from CSV files. This function allows re-analyzing previous results or comparing multiple data sets.
• Eight sample buffers. Provides eight independent channels for storing and comparing measurements. Each buffer maintains a complete response curve that can be viewed simultaneously.
• Audio device selection. Allows specifying independent audio input and output devices. This function is necessary for setups with multiple audio interfaces or specialized hardware.
• Real-time FFT graph. Displays the Fourier analysis of the captured audio signal. The visualization updates continuously during measurement to monitor the input signal.
• Window function selection. Applies different windowing algorithms for FFT analysis. Options include Hann, Hamming, Blackman, and other functions that affect spectral resolution.
• Keyboard frequency control. Allows adjusting generated frequencies using arrow keys. This method provides precise increments for fine frequency adjustments.
• Frequency lock. Locks a specific frequency for continuous generation. The function maintains a stable tone for prolonged measurements at a spectral point.
• Buffer visibility toggle. Controls the display of individual curves using number keys. Each buffer can be shown or hidden independently for selective comparisons.
• Ctrl modifier recording. Activates data capture while holding down the Control key. This mode allows recording measurements during interaction with other program functions.
• Portability. The application runs without installation on the system. All configuration files and data are kept in the execution directory.

The development of Simple Audio Sweeper began in 2023. The program is created by PJDude and is written in the Rust programming language. The application uses audio libraries for signal generation and analysis, with a focus on measurement accuracy and operational stability.

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