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Speech recognition - MP3 to text software

I have some 1-hour-long voice recordings containing useful information that I may need to look up in the future. Instead of transcribing them myself (which will take me many hours), I want to automate it using software. I don't need an accurate transcription; it's OK as long as I can get an idea of what was being talked about by skimming over the transcription. With this, I can quickly figure out which part of the audio contains the information I need, and is much more convenient than seeking randomly.

In theory I could write a program to split the audio into 3 minutes chucks and pipe them into Google Voice's free voicemail transcription service... But I hope there are better solutions. Do you know any free voice transcription software?

Note: Free trials are also acceptable

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  • I think this generally one of those really hard CompSci problems. I was asked to be in a project to listen and transcribe long records once. – wag2639 Jan 29 '11 at 23:33
  • Once again, no clue as to the target operating system! – Dennis Williamson Jan 30 '11 at 00:14
  • @nhinkle Um... that question is similar to mine but I think my requirement differs in that I'm looking for free software and I don't need good accuracy. Hopefully this does not fall into the definition of "duplicate". – netvope Jan 30 '11 at 00:18
  • @Dennis Windows or any free OS (Linux, FreeBSD, etc) that supports the x86 or x86-64 architeture is fine – netvope Jan 30 '11 at 00:19
  • I'd be surprised if you will someone offering such a potentially complex piece of software for free (unless of course, you are Google). I found no such free software doing a search, and only found Dragon from Nuance. – Steve Jan 31 '11 at 08:58

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