UK "unobtainable"/"wrong number" tone, heard on UK land lines. I reproduced it from the ETSI ETS300-001 specification.
Telephone unobtainable or disconnect tone recorded in the UK
Sounds just like a telephone, in pack BEEP this is a GoLDBeRG.
Made by a student in Lyon, France.
A synthesized sinusoid of 440 Hz, corresponding to the frequency of the note A4, with a duration of 10 seconds ...
Set computer volume level at normal. Using headphones or your speakers, play each tone, gradually decreasing the volume until you ...
A one second sinewave of 440Hz, the frequency that corresponds to an A4.
#!/bin/bash # # Create DTMF wav file with SoX # Create a file of the Digit "7" DTMF Tone # ...
Sine wave. 440 Hz frequency Created with Audacity
A one second sinewave of frequency 490Hz
sine wave oscillator tracking randomness