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. Pink noise support was added by Nathan Hurst.First of the test signals boink.mp3 is a collection of tones at individual frequencies. The speaker-test program was written by James Courtier-Dutton. Play in the order of front-right and front-left from the front PCM To do a 2-speaker test using the spdif (coax or optical) output: Speaker-test -Dplug:surround51 -c6 -s1 -f75 To send a nice low 75Hz tone to the Woofer and then exit without touching any other speakers: Produce 5.1 speaker sound from three stereo jacks: Produce 4 speaker sound from two stereo jacks: Produce stereo sound from one stereo jack: Required, pass the channel position strings to this option.ДЄllow supplied FREQ to be outside the default range of 30-8000Hz. If the playback in a specific channel order or channel positions is The default path is /usr/share/sounds/alsa. Specify the directory containing WAV files for playback. Use the given WAV file for the playback instead of pre-defined WAV files. The channel number corresponds to left, right, rear-left, rear-right, center, LFE,ДЇor example, when 1 is passed, it tests the left channel only once rather than both channels When -s option below with a valid channel is given, speaker-test will performДo a single-shot speaker test for the given channel. You can pass the number from 1 to 3 as a backward compatibility. t wav means to play WAV files, either pre-defined files or given via -w option. If you can hear any tone it may indicate resonances in your speaker system or room. Pink noise is perceptually uniform noise - that is, it sounds like every frequency at once. t | -test pink| sine| wav -t pink means use pink noise (default). When 0 is given, the periods given by -P option is used. When 0 is given, use the maximal buffer size. c | -channels NUM NUM channels in stream Indicate that the six audio channels in the device have to be tested. So, if you want to test the last device you can In the above example, there are four devices listed: null, default, frontДЄnd surround40. To get the list of available cards and devices you can run aplay -L.Дiscard all samples (playback) or generate zero samples (capture)Д¤.0 Surround output to Front and Rear speakers Notice that there might be for example, one device forДЄnalog sound, one for digital sound and one for HDMI sound. Want to test another sound device you will have first to get a list ofДЄll of the sound cards in your system and the devices associated with Speaker-test by default will test the default device.

Esser audio test tone generator