Tone sounds

Signal 900 hz (1 min, -24db)
2527 810
Sawtooth signal from 20hz to 20000hz
2511 588
918. 5 hertz signal
2501 725
Sound 440 hertz (a) for tuning viola, viola
2499 889
Sound 41. 20 hertz (e) for bass tuning
2428 675
Sound 293. 66 hertz (d) for violin tuning
2418 578
To hide censorship (short, 1 sec)
213 4

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