@Jperkinski: The plot thickens. I have just enabled Crystal resampler, setting it to 96 KHz.
When I now click on Render, the dialog has changed spontaneously: In the File format dropdown, it now reads “Flac / Stereo / 96 000 Hz / Pegel: 8” (which is a mistranslation, by the way - “Level” doesn’t translate to “Pegel” here, because it has nothing to do with “sound intensity” but with compression efficiency; “Stufe” would be correct, but that’s incidental).
When I open the File format dialog, it looks the same as before except that “Channels” has been set to “Stereo”; “Sample Rate” is still set to use the input stream settings.
When I do the render now, the output file is still in 44.1 kHz! WTF?
I’ve got to go to work now, so I can’t test the other cases right now, but I thought you might find this interesting.