Filtering noise in audio files?

Studies recording lectures on a tape recorder. The several mp3 files. Despite the fact that sitting in the front row, the teacher is heard is not important when listening to lectures we have to turn the sound to max. As a result, any rustling noise is very clearly audible, but if somebody a pen on the Desk put, so this is akin to the explosion of the grenade.

Advise, please, a program that would filter out all these noises (preferably in automatic mode). Or how to distinguish the voice of a man on the General background
October 8th 19 at 03:58
5 answers
October 8th 19 at 04:00
Audacity, for example. Almost all more or less serious program can. But this only applies to "background" noise. The principle is the same. For the sample a fragment, not containing nothing but one homogeneous noise, and based on this snippet removes the noise on the entire record.

Regarding the allocation of the human voice. I probably would have tried to use EQ (cut out low frequencies, to raise the average). Well, more to play with the compression. Briefly, the idea of compression is: Increase the volume of the sound whose amplitude lies below a predetermined level and the part level which is higher than the specified not to touch.

In General, read about compressors, limiters and gates :)
October 8th 19 at 04:02
Goldwave. The program is small and comfortable, not free, but keygen is easy to find. It is possible to cut noise and make much more.
October 8th 19 at 04:04
The only radical way to improve the quality of the recording is to try to negotiate with the lecturers and place the recorder as close as possible to him.
Otherwise, even if you are sampling a clean background monotonous noise, salmeterol neighboring peaks, will filter the voice band would be that the level of reflections from the walls and ceiling are comparable to primary and little bit helps continuous jewelry game gate real-time... Is I am very short, so not much shipping. The result will still have to strain your thinking apparatus to realize the mess that happened.
I like a man who has tried many times to solve a similar task in a professional Studio. Bringing in less palatable species poorly recorded interviews, lasting a few minutes may take an hour or more.
October 8th 19 at 04:06
Thank you all for the answers
October 8th 19 at 04:08
I think that will help a directional microphone (even a cheap one), normalization and equalization (maybe a special preset for a specific lecturer) sound.

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