Hi Ishumael
This is not something I have done, I postulate it as an avenue for investigation
I would guess the steps to be
1. Play the recording into the computer via software that will create a text file, I'm sure Google will come up with several applications
2. Correct those parts of the text that were not interpreted correctly
3. have the computer read the text in an appropriate voice, male. female. child etc
4. record the output of the computer
5. replace by editing, those parts of the original recording that you wish to be disguised
As far as I can see there would be no way to reverse this process, as the is no inflection or accent information in the intermediate text file
I admit this is a time consuming method but would guarantee anonimity
cheers
-pm
-----Original Message-----
From: Association for Recorded Sound Discussion List on behalf of Ishumael Zinyengere
Sent: Fri 16/04/2010 14:59
To: [log in to unmask]
Subject: Re: [ARSCLIST] Voice Distortion
Hi Peter
Thanks but how is that done and which audio or speech editing software tool do you use
--- On Thu, 15/4/10, Mew, Peter <[log in to unmask]> wrote:
From: Mew, Peter <[log in to unmask]>
Subject: Re: [ARSCLIST] Voice Distortion
To: [log in to unmask]
Date: Thursday, 15 April, 2010, 16:57
How about converting Speech to text and back again, editing in the
speech you want disguising
Cheers
-pm
-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:[log in to unmask]] On Behalf Of Lou Judson
Sent: Thu 15 Apr 2010 15:31
To: [log in to unmask]
Subject: Re: [ARSCLIST] Voice Distortion
What a serious problem! The best solution that occurs to me might be
replacing the voice, as in dubbing films into labguages. Is there budget
to cover that?
Or possibly converting it to severe low rate MP3 and back to WAV, before
the final encoding. I have not tried that so not sure. Or some kind of
exotic voice processing such as Darth Vader?
<L>
Lou Judson * Intuitive Audio
415-883-2689
On Apr 15, 2010, at 2:24 AM, Ishumael Zinyengere wrote:
Using more complex effects, or combinations of effects, is also
problematic, because, no matter how complex it gets, it is still
possible to reverse engineer and make the voice recognizable.
We have considered the possibility of using compression to "destroy"
the quality to such an extent that the voice of the witness could not
be recognizable. The big problem with this is applying it
selectively. We only want to distort the voice of the protected
witness, not the voices of the lawyers, judges, interpreters etc.
After all of the work that is going into producing redacted versions
of the audio material, we don't want the end result to sound "bad".
Also, using compression is obviously not an option with the redacted
WAV files. (Identifying the portions of the recordings in which a
protected witness's voice can be heard is a part of the redaction
process.)
One idea that has been suggested is severely limiting the frequency
bandwidth. This is similar to the idea of using compression: making
bad quality work for us by "throwing away" information so it cannot
be retrieved. Sort of an extreme version of a telephone voice. This
seems like it could address most of the issues we've identified: it
can be applied selectively and it shouldn't be too disturbing to the
listener. We are doing some experiments with this option, but would
be very curious to hear if anyone has any experience using this type
of vocal distortion. Does it sound like it might work? Any other
suggestions?
Any assistance would be greatly appreciated
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