The city’s Truth Labs has declared that the conversations in the Shanti Bhushan CD were directly lifted from the Amar Singh tapes and had been “digitally manipulated”.
The lab has found that the makers of the CD, which allegedly contains a conversation of Mr Shanti Bhushan on “bribes for getting PIL”, took direct conversations between Mr Amar Singh and Mr Mulayam Singh Yadav from the Amar Singh tapes and knitted them in the CD.
For instance the sentence: “Ab unko kaun samjhaye... chahe griha mantra ho ya chahe koi aera-gaera ho, inko kya samjhaye” has been lifted from tape 10 of the Amar Singh tapes, a lab official found.
Truth Labs used multi-speech software, gold wave to make wave form analysis, pitch cantor, energy cantor and spectrograms to find that the CD was doctored. “Regarding Mr Shanti Bhushan’s voice, the background noise differed when Mr Amar Singh was speaking, which showed that they were not at the same place and (it) was fabricated,” said Mr K.P.C. Gandhi, chairman of Truth Labs.
Even the word “Char karore”, allegedly used by Mr Shanti Bhushan, was with a high peak and used after a pause, which showed that they had been linked.
Retired CBI CFSL Lab forensic expert S.R. Singh, who is now with Truth Labs of Delhi, has completed the investigation with the aid of video authentication experts in Hyderabad.
Truth Labs officials said that out of 46 sentences, 17 had been directly lifted from the Amar Singh tapes. Mr Gandhi, the Truth Labs chairman, said: “The length of the CD is 1 minute 55 seconds. It has three people in conversation with 46 sentences. We have divided it into three parts. One between Amar Singh and Mulayam Singh with 14 sentences, another between Mulayam Singh and Shanti Bhushan with 20 sentences and the third one between Mulayam and Amar Singh with 12 sentences. In the first part, out of 14, two have been lifted, and the second part, out of 20, three have been lifted. In part three, all 12 have been lifted. We have used latest software from New Jersey in the United States, used by forensic labs across the world, and the best experts in India have worked on it. We took the specimen of Shanti Bhushan too and compared it. We asked for the specimen of Amar Singh and Mulayam Singh, as Prashant Bhushan was also dealing with the Amar Singh tape case, they sent those tapes on which we worked it out.”
“When the speech was compared with tape number 10 of the Amar Singh tape case, we found similar sentences. After analysis, the spectrograms were found to be identical.” He added: “This indicates that the voices recorded earlier in different contexts were used to make the CD. It is not recorded continuously uninterrupted, and is clearly a fabricated CD.”
Truth Labs said there was a sudden increase in the peak at the “char karore” word in the sentence “Zyada paisa ki zaroorat nahi hai... char karore”.
Said a Truth Labs expert: “There is a distinct gap between ‘nahi hai’ and ‘char karore’, which shows each bits of words are attached.”