That channel swap problem is extremely annoying, and i cannot figure out where it comes from. As i utilize a Laptop with Linux, i am more or less limited to USB sound cards. Mine here is Asus Xonar U7, which has excellent low THD and noise. I also tried that card unter Windows 10, but Windows sound system is a serious nightmare: it is noisy, seems limited to 16 bit, and i could not get any sampling rate beyond 48kHz, no matter what i chose. So i will probably pick another one to test, unless you have another hint?