De Altere o tom de vídeo usando o Player VideoLAN (VLC) :
Open your VLC player. Under Tools, click Preferences, at the bottom. Now, click Audio, at the top. Untick Enable Time-Stretching audio. SAVE.
If you play a normal video, nothing else is required. But if you find a video that you are playing needs a pace and pitch adjustment, quickly click on Playback, Speed, and try (at first) clicking on the appropriate fine speed adjustment.
De Como alterar o tom no Windows Media Player :
Open the audio or video file in Windows Media Player. If the file is playing in the Library window, click the bottom-right "Switch to Now Playing" button. Step
Right-click anywhere in the Now Playing window, point to "Enhancements" and then select "Graphic Equalizer."
Select the graphic mode you prefer, such as individual adjustments or loose/fine groups. The icon next to the selection describes it, and a textual description appears if you hover your mouse pointer over the option. Step
Click and drag the sliders to change the pitch. You might notice the greatest effect around the 2 KHz slider, but what produces the most effect varies between people.
Click the small "X" at the top right of the Graphic Equalizer pop-up to close the utility.