Current version: 1.1.2
Spectrum Analyser is an application that shows the frequency content of
the audio data currently recorded by the sound input device you select.
You can choose to analyse any sound input available on your computer. Common
ones are the microphone, internal CD and AV connector. It makes use of
real-time signal processing algorithms to display the spectral data as
the sound is grabbed by the computer. Since version 1.1, standard sound
files (AIFF) can also be opened and viewed frame by frame. It can be usefull
to musicians for tuning and viewing the harmonic content of any instrument.
Engineers and students who need a Spectrum Analyser in the audio frequencies
can also plug a wire terminated audio jack in the microphone input and
probe a circuit. Because it supports various sampling rates and bit sizes,
Spectrum Analyser version 1.1 now runs on all Power Macintoshes and PowerPC
based Performas computers.
The application is designed to look like a real Spectrum Analyser. The
interface is very intuitive. With the controls avalaible in the display
window, it is easy to zoom on a specific feature, change the resolution
or freeze the display to copy or print a nice looking spectrum. You can
easily customize the colors. It is also possible to specify what to copy
in the clipboard, either the drawing, the data or both. The sampling rate
and bit size used for recording can be changed under the "Input device"
item under the "Options" menu. To view a sound file frame by frame you
can either select the "Open..." item in the file menu and navigate to choose
the file you want or drop one or more AIFF file on Spectrum Analyser. You
will then be asked to select some settings before each file can be analysed.
Using Spectrum Analyser
1.0 Was the initial release.
1.1 Added the frame by frame file viewing option.
Basic Apple Events are now supported. (Files (AIFF) can be dropped
on the application)
Choice of sampling rate and bit size avalaible on each specific machine
Displaying analysis information as well as sample Rate and bit size
Axes are included (if visibles) when the graph is copied.
Fixed a couple of drawing bugs.
1.1.1 Bug fix version for a sound manager 3.2.1 issue
New error handling interface
Really added axes to pasted graphs
1.1.2 68k Compatibility release
We plan to add nifty features such as:
Of course your feedback and suggestions are more than welcome.
A peak search control associated with a peak mark on the display and indications
of the peak frequency and amplitude.
More powerful controls to change ranges, with arrows, just like the "HP"
Frame averaging (video bandwidth)
Flexibility when analysing a file (go to a specific frame, show one frame
out of x)
Optimize for speed
Provide a synchro output to allow frequency response measurments
Use two channels if stereo input is available
Ballon help and Apple Guide
Spectrum analyser is a US $10 shareware. Kagi Shareware services are used
to collect fees. Almost all payment methods are accepted by Kagi. A registration
application is included in the distributed package.
Downloading Spectrum Analyser
Spectrum Analyser 1.1.2 can be downloaded from various public sites.
You can get it right now from:
If you have any questions, suggestions or comments about Spectrum Analyser
please feel free to contact us at :