View source for Talk:Sliding Stretch

{{ednote|'''Peter 12July12:'''  The following is taken from Clayton Otey's [http://wiki.audacityteam.org/wiki/TimeScaleGUI original draft documentation] on the Wiki.}}

==Options==

*Rate Slide
:The type of slide which interpolates between the initial and final rate scaling.

*Pitch Slide
:The type of slide which interpolates between the initial and final pitch shift.

*Slide Types
:*Linear Rate
::Interpolate linearly between the initial and final rates (or pitch percentages).
:*Linear Stretch
::Interpolate linearly the inverse rates, equivalent to the stretch factors (or the inverse pitch percentages).
:*Geometric
::Interpolate geometrically (logarithmic).  This is useful for pitch slides for producing portamento slides, which is linear in half steps.
 
*Slide References
:The interpolation can be with reference to the input or the output audio.   
:The resulting output length for reference=input can be considerably longer than with reference=output, when very low rates are used.
:To simulate a "slowing record", try type=linear rate; reference=output.

*Link Initial/Final
:Fixes the initial and final rates, for a uniform change.  This is for convenience in the UI, and doesn't affect the algorithm.

*Link Rate/Pitch (Resample)
:This forces all changes to the pitch to affect the rate and vice versa, so that the affect is performed by resampling.  
:The result in this case is produced faster, and sounds more "unprocessed" than for arbitrary settings.

*Extreme Rates
: Toggles more extreme settings for the rate slides.

*Clamp Length
:Setting this will force any subsequent changes to preserve the output length.  
:This is useful if you need to fit the output in a fixed output length, but don't know how you want to slide.