I tried every thing I can think of: streaming samples using DFD (direct from disk), from ram, with and without fx, rendered at 1x speed, experimenting with latency time with kontakt AND tracktion. Rendering the whole track, and single tracks.
When exporting the whole edit as an audio file there seems to be some midi errors thrown in as well as the rendering errors, as bass notes are lagging, some are too long etc.
When trying to render a kontakt 2 rhodes part by itself, a lot of notes just cut off with a noticeable pop. The amount of notes that are cut of depends upon the tracktion latency, if I had very low latency almost all of the notes are cut, but raising the latence still doesn't make a useable render.
This problem really makes me consider a switch to logic. I save a lot of time working with a song in tracktion, but what does it matter when you can't render it? It's like MS Word without a printer function
Considering how vital the rendering option is, it's important for Tracktion to sort this out in order for it to be usable for professionals, or even semipros... Right now it's useless for me, but I hope it will be adressed, and for T1 as well as T2.

