If I recall correctly, then saving under a different sampling frequency than the source file has, results in a resampling process using the crystal resampler algorithm in high quality mode.
This also works with “non-standard” source file frequencies (like e.g. 95684 Hz), which can e.g. be generated by manipulating the audio properties field in WL.
However, if I try to resample such a “non-standard” frequency source file using the crystal resampler plugin in a rendering process does not work, because the plugin does not accept non-standard source file sampling frequencies.
So, my questions are: Why does it work when I choose “save as”, but not when I use the crystal resampler plugin.
And: When using the “save as” function, is really the crystal resampler algorithm in high quality mode used, or is there some other algorithm applied?
The background is that I try to time stretch tape transfers which playback too fast (so pitch should also change). Wavelab’s time correction mode is so incredibly slow, that is why I want to achieve this by changing the sample rate in the audio properties field plus subsequent resampling to the original sampling frequency. I am just not sure about the quality of the applied resampling algorithm.
Thanks for any info on this.