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For extreme slowing down, consider using the Paulstretch effect. The "high quality" algorithm is only suitable for small to moderate tempo changes and the sound quality will deteriorate very badly for extreme changes. For small to moderate tempo changes, use the "high quality" option to avoid this problem. The default (fast) algorithm may sometimes sound echoey, especially when slowing down percussive music. If the exact length of the audio is important, select the Use high quality stretching (slow) option. Both of these symptoms may leave a short silence at the end of the resultant selection. When using the default (fast) algorithm, Change Tempo may remove some audio from the start or end of the selection, or not stretch the end of the content to the end of the selection when slowing down. There are limitations here, because Audacity has drawbacks in that it sometimes struggles to find.

This allows users to listen to a piece of music, and set parameters for the number of beats to find. As with any time-stretching effect, some audible distortions will be expected at more extreme settings. The most common way that Audacity can be used to find the BPM of a track is by using its own Beat Finder (Accessed by: Analyze > Beat Finder). If you've not used Audacity before then read this ( very important): Īlso, there's a "Quick Help" guide in the Audacity Help menu.Change Tempo is a time-stretching effect, because it defies the normal expectation that reducing the speed of the audio (thus increasing its length) will reduce the pitch and vice versa. Note also that MP3 encoding always causes a slight loss of sound quality, so unless you specifically need the small file size of an MP3 it is better to export as a WAV file. Note that if you want your final track as an MP3 you will need to install "Lame". Select the "Time shift tool" (double headed arrow ) and drag the music track left/right so that the start lines up with the click track.Leave the other settings at the default and press OK.Set the "Tempo" to the BPM that you counted for the music track.Click on the name of this new track and select "Left Channel".Click on the name of the track and select "Right Channel".From the Tracks menu, select "Stereo to Mono".This will tell you the speed of the required click in "beats per minute" (BPM). Listen to the track and using a watch, count the number of beats in 1 minute.