The Time / Pitch Stretch 2 plug-in (Audio FX) does not work correctly.

given a wave file of length 11.162 seconds:
pitched down by 2 semi-tones gives
- In Goldwave a file of length 12.528 seconds
- In Sonar 7 (while holding the shift key in the plugin) a file of length 12.951 seconds

The math behind it:
2 semi-tones down is a playback speed of 89.0899% (= 2 ^(-2/12)), so this is a length of 1.122 (= 1 / 2 ^(-2/12)). Applied to our file

11.162 * 1.122 = 12.528 seconds

so Goldwave is right and Sonar is wrong

In Cakewalk Time/Pitch Stretch 2, length and pitch are adjusted separately and independently.  Unfortunately you need to do your own calculations if you require a proportional shift.

LOL, even in the case I fill the tool with my own correct calculated parameters it does not even work correctly. When I feed it with -2.0 semitones and a time % of 112.2462% I get a length of 12.389 seconds instead of 12.528 seconds. Useless plug-in

its not one of sonar's strong points and hopefully we see improvements on this in the future.

i don't have a problem doing time stretching because i use groove clips.
its much easier to stretch and shift.
but i agree with ease of use could use a few new features

Admittedly it's not very sophisticated, but it has usually worked ok for my purposes.  However I have only ever used it for adjusting either length or pitch, not both together.

it gets more funny

feeding it with a 500 ms wave sample consisting of 500 Hz sinuses and pitching it down makes the wave shorter, I got a 492 ms clip, it should be longer of course Feeding it with a single 500 Hz sinus completely removes it, nothing is left, this is just hilarious

delaydots.com Pitchworks does a better job however you still scratch your head when it completely demolishes a single 500 Hz sinus.

Where is Pro Tools
You know, when making music the musical output is just 50% part of the fun, the other part is the creating process, however if you encounter all these silly things that creating process is not so fun any more

I can tell you, they didn't invent drum n bass by speeding it up while keeping the pitch the same

btw: Does Sonar X2 has this as an Audio FX plug in? If yes, can we use that dll file for Sonar 7?

damn, I almost did it myself, only need some one to wrap it into a DX-plugin. Here is the algorithm, works for speed parameters in the interval (0.0, 1.0] . what happens is in fact resampling, if you play back the resampled file at the original speed you have what you want

public static double[] ReSampleAlgorithmSub1(double width, double[] Samples) { int newLength = (int)Math.floor(Samples.length / width); double OutputSamples[] = new double[newLength]; double time = 0; for (int i = 0; i < OutputSamples.length; i++) { int selectSample = (int)Math.floor(time); int selectNextSample = (int)Math.floor(time + width); if (selectSample == selectNextSample || selectNextSample == Samples.length ){ OutputSamples = Samples[selectSample]; } else { double weightFirstSample = selectNextSample - time; double weightNextSample = (time + width) - selectNextSample; OutputSamples = (weightFirstSample * Samples[selectSample] + weightNextSample * Samples[selectNextSample]) / width; } time = time + width; } return OutputSamples; }