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What is Sample Champion?
Accurate,
fast and powerful
Sample
Champion is an accurate and easy to use audio measurement
software. It has been designed for acoustical technicians,
sound engineers, scientists and students. With this
software you'll be able to easily perform Impulse Response
measurements, FFT analysis and much more.
Amazing
features
Some
very useful options are available, such as:
MLS(*)
pre-filtering (pink and/or custom spectrum)
synchronous
averaging
in time and frequency domain
double
precision FFT
real-time
results (the Impulse Response can be monitored during
the averaging process)
possibility to
calibrate the system using internal or external sources.
(*)MLS
is an abbreviation for Maximum Length Sequence. It is
basically a pseudo-random sequence of pulses. Nowadays
MLS measurements are quite standard in many different
application fields. One of them is acoustics.
More information about the measurement method used in
Sample Champion can be found here.
More information and references about MLS measurement
theory can be found in the bibliography
section of this site.
Expandable
and versatile
Sample
Champion has
been designed with special attention to the possibility
of future improvements and expansions. Special purpose
signal processing plug-ins are available and others
will be released.
Currently
available pugins:
Audio
Quality Plugin
SNR
(Signal to Noise Ratio)
THD
and THD+N
(Total
Harmonic distortion)
IMD
(Intermodulation Distortion)
Read more about this plugin in the
Application note #8.
Go to Application notes main page: click
here.
Filter
Banks
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.
Read
more about this plugin in the Application note
#9.
Go to Application notes main page: click
here.
Waterfall
Plot
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.
Read
more about this plugin in the Application note
#10.
Go to Application notes main page: click
here.
Room
Acoustics
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.
Read
more about this plugin in the Application notes
#11, 12, 13 and 14.
Go to Application notes main page: click
here.
Go to Sample Champion features
or go directly to the download
page and try yourself the trial version of Sample
Champion! (Sample Champion requires Windows 95/98/2000
or NT4 and a full-duplex audio sound card).
Sample
Champion User Manual is now available as single printable
PDF 
file . Click here.
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