EVP I (A haunted Karaoke)
Fig. 1 Spectrogram of the first recording showing the audio feedback at about 1KHz and the anomalous voice (AV1) after 11 seconds. The number of audio samples for each FFT segment is 256. But, soft: behold! lo where it comes again! I'll cross it, though it blast me. - Stay, illusion! If thou hast any sound, or use a voice. Speak to me! W. Shakespeare, Hamlet, 1.1 My nephew XK lives in the US and is a young American who speaks both Portuguese and English. Driven by his love for singing, he was alone at home recording songs with a Karaoke system. Careless about one of his recordings, he left the recorder on a little longer. To his surprise, he noticed an unexpected voice at the end of one of the files. After inquiring the unseen to give him and his mother a reply, the unusual voice appeared a second time. Fearing the invisible, he abandoned his karaoke sessions since then. Fig.2 Filtered waveforms of AV1 in the indicated interval showing the anomalous voice. My sister sent me two of ...