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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.
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.
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.
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.
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.
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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