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Plug-ins
Sample Champion

 

 

 

 

 

 

 



Audio Quality Plugin


This module performs the following measurements:

SNR (Signal to Noise Ratio),


THD and THD+N (Total Harmonic distortion)

Measure of THD and THD+N using a 1 kHz pure tone

 

IMD (Intermodulation Distortion)

More information and instructions about using the plugin can be found in the Application Note #8.
The module is fully working (in demo mode, the computed data cannot be exported to clipboard). It is included in the setup package.



Filter Banks Plugin

This module allows to approximate BUTTERWORTH and CHEBYSHEV low-pass, band-pass and high-pass analog filters by means of IIR (Infinite Impulse Response) digital filters. Moreover two banks of IEC 1260 Octave and 1/3 Octave Filter Banks are implemented as presets. This module can be used for filtering a measured or loaded impulse response.


More information and instructions about using the plugin can be found in the Application Note #9.
This module is fully working and is offered as FREEWARE. The computed coefficients of the IIR filter can be exported to clipboard. The plugin is included in the setup package.



Waterfall Plot Plugin

This module computes and plots (see the below figure) a 3D Cumulative Spectral Decay of an impulse response. This is an invaluable information for finding loudspeaker and box resonances. Many options are available, such as different FFT sizes and weighting windows (independently from the main program settings). Unreliable computed low frequencies are automatically rejected from the plot.


More information and instructions about using the plugin can be found in the Application Note #10.
This module (in demo mode) works only with the three demo files included in the setup package.
It is included in the new setup package.



Room Acoustics Plugin

This module computes and plots many acousical parameters, such as Reverberation Time, Early Decay Time, Definition, Clarity and Centre Time. Many options and features are available: the acoustical parameters can be computed in wideband or in octave or 1/3 octave bands. Results are available in tabular or graphic form. Time data can be plotted in many modes: Log Squared, Schroeder Plot, Step Response, Cumulative Energy. Inverse Schroeder Integration can take advantage of an user selectable noise compensation. Computed data can be exported to Clipboard and plots can be saved to disk as Bitmap images.

 


More information and instructions about using the plugin can be found in Application Note #11,
Application Note #12,
Application Note #13 and Application Note #14.
This module (in demo mode) works only with the provided demo file.
It is included in the setup package.



Enhanced View Plugin

This module extends the Impulse Response view modes and analysis. New features include Energy Time Curve, Spectrogram, Nyquist Plot, Phase Unwrapping, Minimum and Excess Phase computation and Minimum Phase Impulse Response Plot.

More information and instructions about using the plugin can be found in the Application Note #15.
This module is fully working and is offered as FREEWARE.
The plugin
is included in the setup package.

 


Impedance Plugin

This module allows measuring Loudspeaker impedance and the computation of Thiele-Small parameters.

More information and instructions about using the plugin can be found in the Application Note #16.
The plugin is included in the setup package.


 

Some other plugins are currently in development and testing stage.

If you have some suggestions or requests about a specific plugin, feel free to submit them at the following email: newplugin@purebits.com

NOTE: basically plugins are external modules that get either an impulse response or frequency data (calculated from impulse response or scope data) and perform some kind of calculation or processing.

 

 

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