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Editing audio file for transcription work.
#1
I usually edit audio files for all transcription work.  Most of the audio files are either too fast or have some noise.  So to make audio sound better I usually edit audio files prior to transcription work.  There are many techniques for editing audio files using different software.  The main purpose of editing audio file is to make the audio file sound better by decreasing the speed of audio file, making the audio file sound at constant level, and also removing some noise from audio file in order to increase the clarity of the audio.  

First let us discuss the need for decreasing the speed of the audio file and why it is necessary.  Almost all audio files which I get for transcription work are very fast.  My typing speed is around 40 to 50 words per minute and I find the rate of speech or speed of speech is nearly around 80 to 120 words per minute.  To keep the speed of typing nearly equal to speed of speech I need to decrease the speed of the audio file.  Again you cannot really calculate the rate of speech or speed of speech of every audio file during transcription work.  The best solution to this problem is to reduce the speed of the audio file by 5%, 10%, 15%, 20%, 25%, 30%,35% and 40%.  First reduce the speed of the audio file by 5% and then save the audio file with different file name. Repeat this procedure for different audio speed settings.  In this manner you will get 8 different versions of the audio file.  Now select audio file which sounds better for you and start transcription work.  Always remember to reduce the speed of the audio file without changing the pitch of the audio file.

Another problem with audio file is volume level of the audio file.  Sometimes I find some parts of audio file have low volume and some parts of the audio file have high volume. Using audio compression/decompression technology, you can increase or decrease the volume of the audio file or make the volume of the audio file sound at a constant level.

Noise is always present in most of the audio files which I get for transcription work.  You can remove some noise from audio files to make the audio file sound better.

In summary you can reduce the speed of the audio file, apply audio compression/decompression to correct the volume of the audio file and remove noise from audio files in order to make audio files sound better for transcription work.

Thank you.
 
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