The Prosecutor’s Office announced the findings of the National Institute of Forensic Science in the Interior Ministry. Experts from the Institute concluded that the tapes are not originals and have been recorded from one device to another, which allows for potential manipulation. The tapes contain alleged conversations between senior government figures in Bulgaria, and suggest that the officials granted political favours to businesses in the country. The scandal that erupted following the release of the tapes has prompted the government to call a confidence vote in parliament, which it is expected to win. Forensic experts concluded that the tapes were created by re-recording original stereo signals using additional electronic devices, most likely a computer.
“The signal levels and quality in the three tapes varies. The examination has found background noise with similar frequency characteristics and a signal with frequency and amplitude that repeats in the three tapes. This provides the basis for the conclusion that they were re-recorded under the same acoustic conditions.
"At the beginning and at the end, there is a sound from a recording device or the touching of a microphone,” reads the expert conclusion. “The deviations described above in the amplitude and frequency characteristics and in the syntax, style, and intonation features could be the result of manipulations of the tapes,” the investigation found. The additional noises and the changes in the signal, however, may make it difficult to find specific indications of manipulation. The investigation into the so-called "Tapegate" continues, with additional conclusions specifically on the authenticity of the tapes expected from computer experts and the Bulgarian Academy of Sciences.
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