v0.4

Chirplab v0.4 includes:

Graphical User Interface

• File input and output
• Sound card input and output
• Input calibration dialog for acoustic/electrical measurements
• Create and configure projects
• Create and configure measurements
• Save and load measurement presets
• Export individual measurement graphs and data

Command-Line Interface

• Measure an input file using the settings in a Chirplab project file
• Switches to override input file, input channel, and data output directory
• Generate a chirp stimulus file from project file parameters

Runs on Windows, Linux, and Mac. GitHub actions automatically bundle a Windows executable for every build and release.

Measurements

• Frequency Response
• Phase Response
• Group Delay
• Harmonic Distortion
• (new) Impulse Response
• (new) Waterfall
• Tracking Filter
• Residual Distortion

Examples:

• New project response file allowing immediate configuration and exploration of measurements without first needing to capture a chirp response
• Speaker measurement project with example speaker response recording and measurements that are typical for basic electroacoustic evaluation
• THD+N and High Order Harmonic Distortion measurement presets
• Rub and Buzz measurement presets using different analysis methods

Other updates in v0.4

• Settings to control whether measurement noise floor estimate is plotted in GUI or included in measurement data output
• 'dB' output unit for Frequency Response measurement, which normalizes measurement to a reference frequency point
• Help menu with links to GitHub, issues, and wiki
• Other minor tweaks and bugfixes