PennyDimes wrote:nah i refuse to belive that ther is NO WAY that it can be done. How do you explain how perfect these professional producers do it ?? check nearly every kanye song , every heatmakers joint, thers examples of perfectly time stretched vocal samples. And i know some producers will often get someone to re-do the vocal sample , that way they can mess with the vocal any way they like,, but i still think there must be something out ther that can time stretch perfectly, perhaps some piece of hardware..
Refuse all you want, that's one of the laws of nature.
Anything other than 10-15% up or down timestretching WILL cause unnaturalness. Some programs can stretch smoothly up to 20% but STILL nothing is perfect and ALL out of bound stretches will bear some unnaturalness.
Also, SKILL when timestretching helps alot too. Knowing your boundaries, capabilities and limitations is a factor.
Do a websearch for deepsound time stretch calculator and get busy with your mathematics.