It is for CMWP task.
Jenny writes the lecture about basic audio editing, and she recommends two softwares, Audacity and Garageband ( under the Mac OS), to process your audio files. After the lecture, I try to use the Audacity. It allows you to record live or streaming audio, to imports multiple file formats, and it has all the usual editing options. A lengthy list of effects helps you change sample pitch, adjust frequencies and volume, and you can remove many background noises, strip off vocals and more. Sound noise will be the most annoying thing you met, if your sound recorder is not professional. The Audacity makes you reduce the noise to a situation that you can accept. Honestly, only ungodly expensive equipment can capture literally low signal noise ratio sounds file. To gain quality sounds that doesn’t have too much noise, there some tips:
1.Use long enough shielded cable, so that you can move the microphone right away from the computer.
2.Don’t use its built-in mic, because it will pick up a lot of the mechanical noise of the laptop itself.
3. Use Directional microphones.
Then use the Audacity to reduce noise. Select the track which you want to remove its noise, and choose ‘
Now, let’s move to editing. The Audacity provides basic tools which you can cut, copy, paste, and mix. It also has functions that you can do some creative effects.
For example, if I want my voice wich sounds like a cyborg robot, what I need to do is that: record your voice that using the tips above; remove noise by using ‘effect’>’noise removal’; duplicate track couple of times; click ‘effect’ > ‘change pitch’, with ‘percent change’ = 24, -24, 10, -10 (if you duplicate track 4 times); select all tracks and apply ‘tracks’>’mix and render’; then apply ‘effect’ > ‘normalize’ to 0dB.
To know more about sound editing skills, Click these tutorials: