If you enjoy karaoke or recording your voice on top of music tracks, computer software can assist you. Different voices have distinct vocal ranges. Tenors, for example, may not be able to hit the low notes reached by baritones. Audio editing programs, such as Audacity, contain complex digital signal algorithms that manipulate sound. If you have a song with a pitch that does not match your voice, Audacity can alter that pitch without changing the song's tempo.
Launch Audacity. If you do not have the program, visit the Audacity.com and download the installation program.
Click the program's "File" button, and then click "Open." Audacity opens a window containing your hard drive's files.
Double-click one of your music files to load it. Click "Play" to listen to a few seconds of audio. Note the pitch of the song.
Press "Ctrl" and "A" to select the entire audio file.
Click "Effect," and then click "Change Pitch" to open the "Change Pitch" pop-up dialogue window. This window has a "From" text box and a "To" text box. The "From" text box shows the song's current key. For example, if the song is in the key of "D," "D" appears in the "From" text box.
Click the drop-down arrow next to the "To," text box. A list of other keys -- such as C, E and F# -- appears.
Click the key that matches your voice. For instance, if you feel more comfortable singing in the key of F instead of D, click "F."
Click "Preview." Audacity will play a short segment using your selected pitch.
Choose another key in the "To" text box if the song does not match your voice, and click "Preview" again. Continue trying different pitches until you are satisfied with the results.
Click "OK." Audacity applies the pitch change. Click "File," and select "Export as Wav" if you wish to save a .WAV file. Otherwise, click "Export as MP3" to save it as an MP3. Enter a file name in the "File Name" text box, and click "Save."
After altering the pitch, you can undo that change by pressing "Ctrl" and "Z." The Audacity Effect window also has a "Change Tempo" button. Click that, and you can change the audio file's tempo without altering the pitch. This might come in handy if you wish to listen to a speech or recorded voice quickly without distorting the recording's vocal quality.