Sound Test Files - Description:
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.
All sound test files consist of stable pitch tones. They create concentrated spectral energy far above the background white noise level. Therefore, accurate measurements can be made without special noise control. For measurements with fixed pitch tones, long time averaging can be used to provide a very stable spectrum display and provides further noise rejection. A good real-time spectrum analyzer like the HandDee-SA makes this possible.
Like it? Share with your friends!
If you got an error while installing Themes, Software or Games, please, read FAQ.
Supported operating systems:
Pocket PC 2002, Windows Mobile 2003, Windows Mobile 5.0, Windows Mobile 6 Classic, Windows Mobile 6 Professional, Windows Mobile 6.1 Classic, Windows Mobile 6.1 Professional, Windows Mobile 6.5 Professional
Similar Software:
Wizcode ScanDisk Mobile Wizcode ScanDisk Mobile -Storage cards are susceptible to errors. Over time, clusters can become corrupted, part of files can become lost, and a range of other errors can occur
GLBenchmark (Windows Mobile - OpenGL ES CM) GLBenchmark (Windows Mobile - OpenGL ES CM) - GLBenchmark 1.0, the high performance mobile benchmark for OpenGL ES 1.0 and 1.1 environments contains:
GLBenchmark Pro ES 1.0 and 1.1
Complex T-Rex fight gaming scene
Powerful real-time rendering techniques like shadows, particles, skinning, etc
OpenGL ES 1
nuePerformance Tool that lets you view performance data for your Windows Mobile device
SKTools Standard Helps you clear folders such as Internet Explorer contents, history, mail attachments and custom user folders
VSBenchmark 2007 (PPC) Vsbenchmark 2007 is a free graphic benchmark that tests your graphic performances. Vsbenchmark boosts the limits of the classic 2D graphics using the last visual effect technologies. You can compare your results with other devices.
Vsbenchmark 2007 generate automatically graphics result files
TestOpenGLES2 15.08.2010 TestOpenGLES2 is an OpenGL ES 2.0 benchmark/showcase application. It should work on devices like the HTC HD2, mini, Acer S200, Toshiba TG01
3G Test 3G Test is a useful utility to score your 3G network, and it takes 2 - 4 minutes to complete
Mobile ScreenTester Mobile ScreenTester is excellent for testing your PDA''s display to quickly find dead pixels. It is simple to use and it is also a very thin application and it is FREE!
CalendarsAppointments CalendarsAppointments is an app which allows you to make compact appointment text files in a calendar folder based interface. Select the date and select 'New Appointment' from the toolbar to create a new appointment. The appointments are stored on the storage card in dated folders as tiny text files
Other Software by developer «Display Research Laboratory»:
HandDee GTuner guitar tuner S60 / N-Gage 36xx HandDee GTuner guitar tuner S60 / N-Gage 36xx is a mobile phone guitar tuner software for guitarists and musicians. An ergonomically designed smart pitch pointer enable quick and accurate reading of pitch error on the screen of UIQ Symbian phone. The clarity and convenience finds no rival in standalone tuners
PhonTuner (WM PPC) professional singing & guitar tuner PhonTuner (WM PPC) professional singing & guitar tuner is an advanced guitar tuner that also works for violin, piano, and even tricky music like DRUM & SINGING with vibrato. It is the FIRST real-time precision tuner to detect off-tuned notes in continuous performance and a cappella singing
HandDee-SA (OS5) Spectrum Analyzer HandDee-SA (OS5) Spectrum Analyzer - The software generates real-time fading frequency spectrum or 1/3 octave ISO bar. An intelligent wave monitor window gives you a stable waveform display. Smart peaking envelopes are provided for music monitor. HandDee features makes speaker system frequency response & musical recordings check a snap
Visual Guitar Tuner Visual Guitar Tuner - Visual Guitar Tuner is a comprehensive chromatic guitar tuner for Pocket PC users. It provides three tuning selection standards with adjustable A4 frequency from 435Hz to 445Hz. It also provides pitch pipe tone output and sound texture reference
Pocket Spectrogram and Spectrum Analyzer -PSSA (WM PPC) Pocket Spectrogram and Spectrum Analyzer -PSSA (WM PPC) generates real-time scrolling spectrogram or fading frequency spectrum display on the pocket PC. Color coded scrolling spectrogram is perfect for language therapy, phonetic & advanced singing practices. The fading frequency spectral analysis provides clear contrast of spectral strength for phonetic drills
HandDee GTuner (WM PPC) guitar tuner HandDee GTuner (WM PPC) guitar tuner is a guitar tuner software for guitarists and musicians to tune their guitar. It uses the same noise rejection and quick note detection technique of our highly successful PhonTuner singing software with the addition of alternate guitar tunings and string position indicator
HandDee-SA (UIQ) Spectrum Analyzer HandDee-SA (UIQ) Spectrum Analyzer - With the HandDee Spectrum Analyzer, a PDA becomes probably the world's cheapest, smallest and easiest-to-use color graphic handheld real-time audio spectrum analyzer, not to mention the expensive & bulky portable RTA.
The software generates real-time fading frequency spectrum or 1/3 octave ISO bar
HandDee GTuner HandDee GTuner is a mobile phone guitar tuner software for guitarists and musicians. An ergonomically designed smart pitch pointer enable quick and accurate reading of pitch error on the screen of UIQ Symbian phone. The clarity and convenience finds no rival in standalone tuners
HandDee-EO Electronic Organ & Piano Chords HandDee-EO Electronic Organ & Piano Chords is the ultimate virtual piano for Pocket PC. It incorpoates a polyphonic synthesis engine and closely emulates the keyboard including loudness control and realistic chord sounds. It also includes a comprehensive chord dictionary and glossary of musical terms
PhonTuner (Palm OS) PhonTuner (Palm OS) is an advanced tuner for musical instruments tuning and vocal practice. It is the FIRST precision tuner to detect off-tuned notes in recordings and uninterrupted performance. Enjoy seeing the secrets of popular singers' tonal accuracy and temperament used by top violinists. It can also alerts when your piano needs tuning
