- https://www.google.com.au/webhp#q=voice+biometrics+open+source

Not the best answer but I am an alumni of a program that now has an audio forensics masters program. Perhaps someone there might be of interest or help. I do not have any personal connections left there.

http://www.ucdenver.edu/academics/colleges/CAM/Centers/ncmf/Pages/MediaForensicsGraduateProgram.aspx

...Try on with Kay Elemetrics products or Kay Pentax products, for example: Computerized Speech Lab (CSL) and Multi-Speech Options.

…My recommendation is the same to Oct, 19, 2015.

In addition, is interesting to see PENTAX Medical Products, particularly ENT& Speech.

 Best regards,

 D. Escobedo.

My recommendation is IV-12 Intelligent voice workstation. It is very convenient to examine the audio and video mixed files. It has the active audio and video separation technology, the separated wav file and the original video linkage. Voice locates the corresponding video location at any time, and the environment of the speaker is clear at a glance. It helps the appraiser to grasp the actual environment of the speaker, and to express his expression and abnormal limbs movements.

Kay Elemetrics products or Kay Pentax products, for example: Computerized Speech Lab (CSL) and Multi-Speech Options is a very good attempt. With less requirements, but good results would be Praat software. There is much software that are able to get voice or speech wav file without any compression very useful for a lot of applications.

Best regards,

D. Escobedo.

I would recommend several options, depending on your approach for forensic voice analysis.

1.) Full manual:

* Kay Pentax CSL and multispeech: I's designed for clinical use and a little bit old but has accurate results for the acoustical analysis.

* PRAAT

2.) Semi-automatic:

* Akustec OT

* IKAR Lab

3.) Automatic:

* Agnitio's (or Nuance's now, I'm not really shure) BatVOX

* Phonexia

* OxfordWaveResearch VOCALISE

* Akustek