At the link above is the firmware 1.32ac3cd said:
As i wrote: I never tried to burn at a lower speed and i use always the Pioneer DVS-R47A/E and DVS-R470SD media, but i known people which use other media (simple speed 1X) and they can burn at 1X.joanna said:oficial 1.33 willl only burn dvdmaster2x dvd-r at 1x
1.33 2x forall has trouble with some burning software
if you choose 1x speed it burns at 2x