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.
Using Spectrum Analyser
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.
Version History
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 if wanted.
-Axes are included (if visibles) when the graph is copied.
-Fixed a couple of drawing bugs.
1.1.1 Bug Fix Version
-Fixed a bug that caused ringing in spectra, Snd Manager is not returning
all the data in the completion. Bug was made apparent by larger internal buffer in snd mgr provided with 7.5.5
-Now really include axes (if visibles) when the graph is copied.
-Better error handling interface
-Fixed an amplitude normalisation bug. Amplitudes are now displayed correctly.
Scheduled Improvements
We plan to add nifty features such as:
-A peak search control associated with a peak mark on the display and indications of the peak frequency and amplitude.
-More powerfull controls to change ranges, with arrows, just like the "HP™" instruments !!!
Of course your feedback and suggestions are more than welcome.
Registration Information
Note that Spectrum Analyser is not a free product if you continue using it after a 30 days trial, you must register this software with Kagi Shareware. The registration fee is 10 US dollars. Kagi is a shareware fee collection agency that simplifies the life of both users and programmers. It offers you a wide variety of payment methods and a registration program that almost fills out the form for you !
Please make payments to "Kagi Shareware" in US money if possible.
You can send your registration form, along with the payment, to:
e-mail: shareware@kagi.com
FAX : 1-510-652-6589
Postal address:
Kagi Shareware
1442-A Walnut Street #392-GJ
Berkeley, California, 94709-1405
USA.
Remember, the fee is only ten US dollars. It is more likely to be very little for you and it could make a big difference for us.
As soon as we will receive you registration confirmation, we will send you your unique serial number. This will remove the shareware notices and personalize your copy of Spectrum Analyser. We will also notify you of upcomming new versions.
This is a legal agreement between you and Daffy Software® covering your use of Spectrum Analyser. IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, DO NOT USE THE SOFTWARE AND DESTROY ALL COPIES OF IT.
Spectrum Analyser is distributed as shareware. You may try out this software without any charge for a period of 30 days, if you continue to use the software you must pay the regsitration fee. You may distribute Spectrum Analyser to others provided that the package remains unchanged and that you do not charge for it.You may not rent or lease the software, nor may you modify, adapt, translate, reverse engineer, decompile, or disassemble the software. If you violate any part of this agreement, your right to use this software terminates automatically and you then destroy all copies of this software in your possession.
Commercial distributors must have the written permission of the authors before distributing the software in any way.
Use this software at your own risk. We make no warranty, either express or implied regarding the fitness of "Spectrum Analyser" software and documentation for any particular purpose. Spectum Analyser can run only on Power Macintosh Computers. On 68k machines, an alert should inform you that you need a Power Macintosh. Note also that the performance of Spectrum Analyser is greatly influenced by the computer it runs on. On a Power Macintosh 7600/120, the display is very smooth at any resolution and the frame rate is resolution limited. On a 7200/90, few frames are skipped once in a while. This is not the case with a PowerBook 5300ce where the frame rate is maily limited by the slow access to the display. These performances might also depend on you custom software configuration. And the tests we performed don't give any warranty of fitness for any particular purpose. We claim no liability for any problems caused directly or indirectly by the software.
About Daffy Software
Daffy Sofware is a canadian society formed to promote and include signal proccessing applications in softwares for a large public. Although we do have other small programs, our main development stream is signal processing and music. Spectrum Analyser is a spin off of that main stream that shows what can be done with the new power recently brought to the world of personnal computing. If your are a musician, from the very beginner to the top professional watch for our forthcomming products.
Questions, comments or bug reports:
Whether you are registered or not, please feel free to contact us if you have any question, comments or bug report.
It is always appreciated to have feedback from users to improve our programs.
