![]() ![]() Some subwoofer models do not feature a built-in test tone generator, so an 85 Hz test tone is useful to help set the phase adjustment correctly. The fourth signal 85Hz_sinewave.mp3 contains a tone for adjusting the phase of a Genelec subwoofer. Also, you can use this signal together with an octave-band or a third-octave-band real time analyzer to calibrate your sound system. It has a spectrum similar to actual musical signal, and stresses your sound system similarly. It is an excellent signal for comparing the effect of any change you introduce in your sound system in the A/B test fashion. This 'Pink' noise has a particular characteristic (equal power per octave, power density decreases 3dB per octave) that makes all frequencies in the noise equally audible and therefore the pink noise can reveal very small frequency response differences effectively. The third signal pink.mp3 contains noise. Also you can locate problematic structures in your room, such as resonating curtain rails or furniture rattling at certain frequencies. Use this signal to check at what frequency the sound in your audio system becomes audible, how precisely the sound level remains constant over frequency and to locate any clear dips (anti-resonances) and peaks (resonances) in level at your listening location. The level of the signal remains constant. The second test tone sweep1.mp3 contains a tone that changes linearly in frequency from 10Hz to 150Hz. Start from a low sound level and work up towards higher levels. This signal is particularly useful for testing the output capacity of your system because the signal is not continuous, stressing your audio system similar to actual music and yet the signal is analytical and well defined. The source may be your loudspeakers but also something resonating in your listening room or even the audio equipment feeding the loudspeakers. If you hear any distortion, noises or rattling check your sound system and your room. ![]() The tone should be clean and all tones should have the same level. As you play this signal pay attention to the purity of the tone. There is a little space between the tones to enable your audio system to build up its forces. NOTE: You can open the caf file using QuickTime Player, export it with "Audio Only" as an m4a file from the File menu, and import the m4a file into the Music app with the "Import." from the File menu.First of the test signals boink.mp3 is a collection of tones at individual frequencies. Undo/Redo support for parameter changes.Keyboard shortcuts to adjust various parameters. ![]() Save audio test signal as an audio file.Level meters: peak, RMS (root-mean-square), and average.Channels: mono, stereo, left, and right.Bit depths: 8-bit, 16-bit, 24-bit integers, and 32-bit float.Level: fixed, linear sweep, and logarithmic sweep.Frequency: fixed, linear sweep, and logarithmic sweep.Wave types: sine wave, triangle wave, sawtooth wave, square wave, pulse wave, anti-aliased sawtooth wave, anti-aliased square wave, anti-aliased pulse wave, uniform distribution white noise, pink noise, brown noise, and Gaussian distribution white noise.Generates audio test signals and can save audio test signals as audio files.ĪudioTest generates audio test signals and can save audio test signals as audio files. ![]()
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