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Some sound files in WMA format are included to help you calibrate your headphone, loudspeaker, headphone, Hi-Fi and related audio equipment.
"ever_rising1.wma" and "freq_sweep.wma" consists of a tone that increase in pitch endlessly. The harmonics are designed to fade in from the bottom and fade out at high pitch. It is the equivalent of the visual ever rising staircase. An audio perception paradox. Its application is in the checking of audio equipment frequency response. As the harmonic peaks sweep through the spectrum, you can see the locations of resonant peaks. A peak profiling line that holds the most recents spectral peaks for more than 3 seconds will give a stable peaking envelop which is the frequency response curve of the loudspeaker system.
"intermodulation.wma" consists of two sine waves of 1KHz and 1.1KHz. If the amplitude response of the loudspeaker system is perfectly linear and there is no saturation or amplitude distortion in any part of the system, then there are only spectral peaks at 1KHz and 1.1KHz. Other wise, you will find other spectral peaks, notably at 1-n*0.1KHz, 1.1+n*0.1KHz, 2.1KHz, 2.1+/-0.1KHz, +/-0.2KHz etc..
"sine_all522.wma" consists of sine waves of 1KHz, 2KHz, 3KHz, 4KHz and 5KHz having same amplitude. Under ideal condition, they should create 5 equal spaced spectral peaks in an audio spectrum analyzer. For the overall system having flat response, the 5 peaks should have the same height. If it does not, the problem may be due to one or more of the pocketPC output, any external amplifier, speaker, microphone, signal amplifier, and analogue to digital converter. It is also possible for one part in the system to compensate for imperfection in another part, such as the equalizer or equalizing amplifier.
"square.wma" is a simple 100Hz pulse. It can be used to see the step response of the overall system. A stable triggering of the waveform is needed.
To use the files, select it in a MediaPlayer. Also select looping or repeating mode of playback. Then you can begin to play the sound file. Most players create an artificial silent time between repetitions. The ears can detect this easily. But the program can skip over the silent period if we choose the long-time average mode. For accurate frequency measurement, the narrow band analysis should be used. However, the wider shape of spectral peaks for wide band analysis makes peaks easy to identify and measure.
Normally, you will connect your earphone output to the audio equipment under test. Then you bring the pocketPC near the speaker of the system, and run a spectrum or spectrogram display porgram while the Media or MP3 Player is running in the background. Some Media Players amy not be able to produce continuous sound even within the time span of the sound file, which cannot be used.
System requirements:
- Windows Mobile PocketPC

Test your knowledge of sports with this fun, colorful freeware trivia game! Brought to you by Mobileplay.com, this game quizzes you on a variety of topics related to all your favorite teams, sports heroes and more. Get Mobileplay Sports Trivia on your Palm OS device today!

Sound building tool to create a series of sounds and build sound effects of unlimited duration.

Input the Frequency, duration, and volume and simply add them to a list. It is extremely simple and time effective.

Not only does it let you design your own sound effects faster but it has a tool to help you find system sounds and track them.

Also in v1.5 a new feature is a wav player to play/test your wav files for your benifit.

Sound tester 1.5 is a must have for frequency based sound design

Untested on lower resolution

This app is freeware so feel free to share it with anyone.

I would love for you to email me with reports and requests. Thanks and have fun!

Hunt a mammoth. Coordinate hunters of your your tribe and drive mammoth into the pit (in the center of the screen). When mammoth detects a hunter, it tries to escape (in the direction with least number of people).
System requirements:
- Java compatible

3D Golf Driving Range 0.2 is an exciting and tractable game which helps you to entertain yourself effectively. A very simple simulation of hitting golf balls on a driving range.