For a full description of the emulation features, I recommend you read the latest X128 text file . Faster X-mode by reducing the amount of video ram accesses.
Sound always regains synchronisation automatically.
Added TR-DOS speedup option in the INI file. SB16 syntax option. The following files are available for download. If you download it and find you can't get it playing the sound well even with frame skipping, you can try the Adlib version below, which is like older versions of X128. This one is more like the older versions of X128.