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Title: Software - Purebits Homepage - Professional Audio Software Home of Sample Champion, a real-time software tool designed for high precision acoustic measurements.
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Audio Spectrum Analyzer and Acoustics Software
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Main
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Champion
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Champion
Manual
on-line
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and RAQ
Tips
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issues
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theory
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notes
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Tutorials 
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ARkeeper
Are you looking for a powerful
document archiving system, a personal and small office finance
manager, an Invoice generator and manager, with single or multi
page PDF files creation capabilities?
ARkeeper is what you are looking for! Learn more..
Free download
You can download
and evaluate a
fully working trial
version of our
audio measuring
software Sample
Champion
get it now!
Did you know...
...that Sample Champion can be used to
analyze and optimize your home Hi-Fi system?
more...
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your email address below if you wish to be informed about the
availability of updates, new developments and special offers.
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PureBits Homepage
Sample Champion Overview
Sample Champion Features
Sample Champion Plugins
Download
Order
Support
Read Manual on-line
F.A.Q.
Tips
Known issues
Most common problems (and
solutions)
Resources
MLS theory notes
Videotutorial
Application notes index
A.N.#1 Loudspeaker Frequency
Response measurement
A.N.#2 Examples of reflections
on a surface
A.N.#3 Equalization and pre-equalization
A.N.#4 How detecting distorsion
in MLS measurements
A.N.#5 Using square and ramp
signal types
A.N.#6 MLS and pink filter.
Why use it?
A.N.#7 Average in time and
frequency domains
A.N.#8 Measurement of SNR,
THD, THD+N and IMD
A.N.#9 BUTTERWORTH and CHEBYSHEV
digital filter
A.N.#10 The Waterfall Plot
A.N.#11 Acoustical Parameters
Measurement
A.N.#12 Reverberation Time
computation
A.N.#13 Step Response of
a Loudspeaker
A.N.#14 Log Squared and
Cumulative Energy Plot
A.N.#15 ETC, Spectrogram,
Nyquist Plot..
A.N.#16 Impedance and Thiele-Small
parameters
A.N.#17 Impedance: connector
box construction
A.N.#18 Phase check in a
Louspeaker system
A.N.#19 Reat Time Analyzer.
Features and use.
Bibliography
Links
Latest updates
Contact us
Site map
Welcome to PureBits.com
Sample
Champion 
Sample
Champion Vr. 3.8
Trial version available
for download.
Many exciting functions have been added!
Read about the new
features here.
Updated
PDF User Manual (4.23 MB)
A
complete list of all Sample Champion features here.
Sample Champion is fully compatible
with
VISTA™ 32 bit operating system
NEW:
Available
for download a small utility for converting Impedance files
saved by Sample Champion to the standard ZMA format.
Read more..
X4
and X2
USB
soundcards from PUREBITS!
 
 
 
Click
here to read full
specifications
CURRENTLY
NOT ON SALE
USB
Soundcard review: "It's
truly great! I have tried it out several times and each time
I'm blown away with how well it works, as well as the superb
recording it can make when coupled with inexpensive Panasonic
mic capsules!" >
Sample
Champion Video
Tutorials
They can be freely watched online or downloaded for
offline use.
CLICK
HERE
Latest User reviews: "A
very
good tool. Highly recommended for professionals and amatures
who is into loudspeaker design and installations. Works well
with laptops too with USB sound card (like X2 and X4), and an
inexpensive measurement microphone such as Behringer's ECM8000.
A complete measurement system for a fraction of the cost you
might pay for other tools with less features and flexibility".
"Quite simply awesome! Have used it to design a speaker
for my office which came out terrific. Also used it to tweak
the triamped speakers that I designed for my church. One is
a center long throw for voice and a stereo setup on the sides.
SC was quick and very accurate.."
Read more.
NEW:
Microphone
comparison.
Read more.
NEW:
Sample
Champion has been used and reviewed in the Das PC Tonstudio
book. Read more.
NEW:
Sample
Champion has been reviewed in the Australian Hi-Fi Magazine,
Number 2, Volume 35, April/May 2004. Read
more.
NEW:
Sample
Champion has been used for all the measurements in the book
Ribbon Loudspeakers by Justus V. Verhagen. Read
more.
NEW:
A
step by step guide for the Amplitude Calibration procedure.
Click here.
NEW:
See
Sample Champion in action! Some images of the audio laboratory
of one of our customers, Rolf Urbanke.
Click
here
NEW:
JANUARY 2005 - NEW PRICES!! UP TO 50% DISCOUNTS ON ALL
PRODUCTS AND NEW ENTRY-LEVEL LICENSES AVAILABLE! Check
here the new prices.
NEW:
A sound card can
be used for serious acoustical measurements? This is
the question..
A measurement comparison between measurements done with Sample
Champion and a sound card and the well known MLS measurement
system MLSSA (hardware based) gives the answer. Read
or download the comparison here
(PDF file).
NEW:
Read
a review of Sample Champion by Charles Miltenberger from Vidsonix
(the manufacturer of the Virtual Crossover Box). Click
here to read the full review
NEW: Some
measurements on a very good soundcard: the RME
96/8 PST.
Excellent frequency response!
NEW: First
results of our tests of the Vidsonix
Virtual Crossover Box...
NEW:
The
EGO-SYS U24 USB Audio
Interface,
evolution of the U24, has been tested with Sample Champion.
Read more...
NEW: Phase
check in a car Louspeaker system using Sample Champion.
Read the full story..
NEW:
The
EGO-SYS U2A USB Audio
Interface page has been updated with some new tests and
comparisons.
Click
here for more information about
this sound card.
NEW:
The
Manual updated to Vr.2.5
is ready. Click here
to download (about 4.6 MB).
NEW: How
can be used the utility RemoteSC, included in the download
package, for starting from
an external software
a
measurement in Sample Champion
and
saving the measured
Impulse
Response?
Download the answer here
(example and source code in Delphi, freely usable).
User
Reviews.
Read some comments and opinions from Sample Champion users.
Click here.
NEW:
Sample
Champion supports WDM audio drivers. Using these drivers
can lead to some advantages. Read more here.
NEW: We
are testing the EGO-SYS U2A
USB Audio Interface with Sample Champion. It seems
to be compatible: an excellent solution for laptop users.
[NEW]
Click
here for more information about
this sound card.
Six
plugins are available for Sample Champion,
our software designed for high precision acoustic measurements.
They are included in the setup package.
They are:
Audio
Quality (SNR, THD, THD+N, IMD)
Filter
Banks (BUTTERWORTH and CHEBYSHEV IIR
digital filter, IEC 1260 Octave and 1/3 Octave Filter Banks)
(1)
Waterfall
plot
Room
Acoustics plugin
Enhanced
View plugin (1)
Impedance
and Thiele-Small plugin
NEW!
(1)
This
plugin is FREEWARE
Download
last updated version 2.5. Read
about added features.
Configuration
tips:
Most common problems (and solutions)
(read on-line)
Download Faq, Tips and Most common problems and solutions
as a single PDF
file: click here
(745K)
Netscape
users: Shift-click to download
Explorer
users: Click right
mouse button and to select "Save"
to download
With
Sample Champion you'll
be able to measure the Impulse Response of a room, or
analyze loudspeaker frequency Responses with just a
mouse click. Never before it has been so simple to perform
measurements using the MLS (Maximum Length
Sequence) method.
Sample
Champion Screenshot
(Click
for a larger image)
Sample
Champion requires Windows 95/98/2000 or NT4 and
a full-duplex audio sound card. To learn more about program
features and specifications click
here. Moreover, Sample Champion
is expandable, by using especially created software modules
(plug-ins), to perform
DSP operations in time and frequency domains. The Pro
version can manage MLS lengths up to 256K samples, spectrum
operations and double precision FFT up to 64K points, custom
sample rate from 5 kHz to 96 kHz (depending on the sound card
hardware), averaged and repeated measurements, data windowing,
pre-filtering of the MLS signal and post-filtering on sampled
data. It can load and save Impulse Response files in TIM (MLSSA™)
format.
Examples of measurements performed by using Sample Champion:
(Click
on thumbnails to see a larger image)
More
examples can be found in the Application
notes section.
Take a closer look and
don't miss to download and
try yourself the fully working trial version!
NEW:
Audio Quality Plugin released!
This module is included in the setup package and performs SNR
(Signal to Noise Ratio), THD
and THD+N
(Total
Harmonic Distortion),
IMD (Intermodulation Distortion) measurements.
It is fully working (in demo mode, the computed data cannot
be exported to the clipboard). Click here
for more information...
NEW:
Filter
Banks Plugin
released! 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 to filter a
measured or loaded impulse response and the computed coefficients
can be exported for further use.
It is offered as FREEWARE!
Click here
for more information...
NEW:
Waterfall
plot plugin
released! This module computes and plots (see the figure
below)
a 3D Cumulative Spectral Decay of an impulse response.
This is an invaluable information
for evaluating loudspeaker
and box resonances. Many options are available.
Click here
for more information...
Waterfall
(Cumulative Spectral Decay) Plot
NEW:
Room
Acoustics plugin
released! This module computes and plots many
acoustical parameters, such as Reverberation Time, Early
Decay Time, Definition, Clarity and Centre
Time. Many options and features are available. Click here
for more information...
NEW:
Enhanced
View plugin
released! 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.
It is offered as FREEWARE!
Click here
for more information...
Impulse
Response Spectrogram Plot
NEW:
Impedance
and Thiele-Small plugin
released! This module computes and plots loudspeaker
impedance and allows the computation of Thiele-Small parameters.
Many options and features are available. Click here
for more information...
NEW:
Sample
Champion User Manual is now available as single printable PDF
file . Click here.
Last updates (now included in the manual) can be browsed on-line:
What's new in version 2.5.0.0
(latest update)
What's new in version 1.2.0.10 and
1.0.2.215 (previous update)
What's
new in version 1.0.2.204 (previous update)
In
download section you will found also our FREE Windows Wallpaper
for your Desktop!
Added
4 new Application notes.
Read about latest additions in Sample Champion here.
See
other Test and Measurement sites
in the link section.
If
you want to be notified of product updates or new releases,
just send us an email.
(Read
our Privacy Statement for
more information).
Purebits
website shortcuts:
Acoustics,
Room Acoustics
Frequency
Generator,
Tone
Generator
Audio
signal analysis
Digital
signal processing,
dsp
Speaker
design,
speaker
box design
Audio
spectrum analyzer
Acoustical
design,
Acoustical
engineering
home
theater acoustics
FFT,
Oscilloscope,
Signal
generator
Sound
cards
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Purebits Homepage - Professional Audio Software 2008 October
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Home of Sample Champion, a real-time software tool designed for high precision acoustic measurements.
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