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I have an audio file with a very bad recording (recording was made in very noisy conditions, at a conference). My recorder was too far from the speakers.

Do you have any idea about how to improve the sound quality? Do you know any good resource for that?

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up vote 5 down vote accepted

You can use Audacity. Here is a video tutorial on how to remove noise.

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I love Audacity, and I highly recommend it (but can only upvote sYinfo once...). For the sake of completeness, I'll also mention Wavosaur - another free audio editor. I keep it handy with Audacity as it has better support for VST plugins and ASIO drivers.

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