Topic: Use your RME to watch movies with perfect audio pitch
I know that the majority of RME owners use their equipment for professional reasons, but in case you also use it in your free times when watching some movies in your PC this could be a nice feature to use...
There is a free DShow audio renderer called reclock which let us correct the audio pitch of the movies. The big part of the PAL dvds are speedup from 24fps to 25fps, and the audio is too high pitched. The same happens with Blu-rays, which are slowdown to 23.976fps. With Blu-ray, the lower pitch is not very noticeable, but with PAL material it is.
Using reclock, we just need to set our display's refresh rate to a multiple of 24 and it will slow down (PAL movies) and speedup (BR) the movies to match the display's refresh rate. The audio is resampled to keep the sync with video and it ends with the original pitch.
Now there's a little drawback about this... the audio is resampled by reclock. To overcome this, I've made some slightly changes to reclock to allow us, RME's users, to use the capability of setting the soundcard's clock that we want using DDS.
This way, the audio is pitch corrected without any resampling, we just need to set our RME's clock to 46080Hz for PAL material and to 48048Hz for Blu-ray material.
The full instructions are here.
Reclock, can be downloaded here.
I know we can use the microsoft audio renderer to acomplish this, but since it does not bypass kmixer, we will always end with resampled audio. Reclock supports Kernel Streaming (XP) and WASAPI (Vista), so it will output perfect pitch with bit perfectness.
Note: I have no connection with reclock. I'm just a FF400 owner that wanted to use the full potential of it, and I've just adapted reclock to allow me that. I thought it would be a good idea to share this with other RME owners.:-)