Hi,
Audacity has two options under the effects tab also make sure your highlighting
the entire track if its just doing part of the track that may be the reason or
part of all the tracks if your do more then one.
Use Change Tempo to change the tempo and thus the length (duration) of a
selection, without changing its pitch.
To change tempo and pitch si
Percent Change
If you know the amount you want to change the tempo of the selection, enter
that value in the input box. You can also drag the slider to select a value:
the input box will update as you drag the slider.
Beats per minute (BPM)
If you know the BPM of the selection and the BPM you want to change it to,
enter those values here. The BPM "to" value will then update the Percent Change
and Length "to" values.
Length
If you know what you would like the new length of the selection to be, enter
that value in the to input box. The from box shows the current length of the
selection and cannot be changed. This is useful if you have a piece of
narration that is just a little bit too long or too short to fit where you want
it.
Use high quality stretching (slow)
If this checkbox is enabled, the same SBSMS high quality algorithm is used that
is used in the Sliding Stretch effect. Change Tempo will process much more
slowly if this checkbox is enabled, but will retain the complete content. For
small to moderate tempo changes, the resulting quality will usually be higher,
especially with percussive music (such as piano music).
Limitations
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. As with any time-stretching effect, some
audible distortions will be expected at more extreme settings.
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. Both of these symptoms may leave
a short silence at the end of the resultant selection. If the exact length of
the audio is important, select the Use high quality stretching (slow) option.
The default (fast) algorithm may sometimes sound echoey, especially when
slowing down percussive music. For small to moderate tempo changes, use the
"high quality" option to avoid this problem.
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 extreme slowing down, consider using the Paulstretch effect.
Buttons
Clicking on the command buttons give the following results:
Manage gives a dropdown menu enabling you to manage presets for the tool and to
see some detail about the tool. For details see Manage presets
Preview plays a short preview of what the audio would sound like if the effect
is applied with the current settings, without making actual changes to the
audio. The length of preview is determined by your setting in Edit >
Preferences > Playback, the default setting is 6 seconds.
OK applies the effect to the selected audio with the current effect settings
and closes the dialog
Cancel aborts the effect and leaves the audio unchanged, closing the dialog
 brings you to the appropriate page in the Manual, this page
On Saturday, January 12, 2019 enzo 1234 <audacity4blind@xxxxxxxxxxxxx> wrote:
Hi guys, so i have this beat and i want to change the tempo. However when I
change the tempo it only changes the begining part of the beat. How do i change
the tempo so that it changes the whole song?appreciate any help. thanks.
regards, Enzo
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