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Subject:Beat Mixing
Posted by: spinguy
Date:1/27/2000 7:15:00 PM

Can Sound Forge beat mix 2 prerecorded songs of differt
bpms for a dance mix? If so how? Thanks for everything.

Subject:Re: Beat Mixing
Reply by: Kelly_S
Date:1/28/2000 12:52:00 PM

Hello.

To use the Edit Tempo function, first make a selection in the
waveform display. The selection made should be equal in size to the
length of a beat or measure. The easiest way to tune a selection to
be exactly one measure long is to play the selection looped and
change the selection points until a constant downbeat is heard. In
other words you need to set up a loop of one measure to give Sound
Forge 4.5 a frame of reference.
After you have a measure selected that loops properly, go to the
Special menu and choose Edit Tempo. The Start, End, and Length fields
will show you what you have selected. There is no need to chage these
values or the Input format. The 2 important pieces of information
are:

Selection Length in Beats
This control specifies the number of beats in the current selection.
Changing this value will automatically change the Tempo in beats per
minute control.


Number of Beats in a Measure
Use this control to specify the number of beats in a measure when
selecting a measure (e.g. 4 for most pop music out there).

Once you have the above values correct, you should have a value in
the "Tempo in beats per minute" field which seems correct. If it
reads something like 240, you probably have twice as high a number in
Selection Length in Beats (i.e. 8 instead of 4). Pressing OK will
then assign the correct BPM to the file.

You will need to repeat this process on the file you wish to match
beats with to know what its tempo is as well.

Say you have 2 files, A and B, and you want to speed up file B so
that it will match the tempo of file A. After having made note of
file A's tempo, select file B and launch Time Compress/ Expand from
the Process menu. You will want to find the value under Final Length
which gives you the BPM equal or as close as possible the the BPM of
file A under Final tempo. Use the Preview function to select a mode
which works the best for the material you are Compressing or
Expanding.

After changing the tempo of file B, copy it to the clipboard (double
click to select the entire file, then right-click and select copy).
Drop the cursor on the end of file A at the spot you wish to overlap,
right click and select either mix or crossfade, depending on how you
want them to overlap and the transition to work. You may wish to use
our Graphic Fade to tailor these overlapping sections before you mix
them.


Mark L. Santella wrote:
>>Can Sound Forge beat mix 2 prerecorded songs of differt
>>bpms for a dance mix? If so how? Thanks for everything.

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