Menu music plays at its own tempo again. The sequencer was ticked once per frame, which is fifty times a second on a PAL machine where libsnd counts in sixtieths, so it ran a fifth slow. It is the only sequenced music in the game, which is why the fault was confined to the car and course select screens and the shops.
NTSC-U discs are supported. The port already found its files through the ISO directory, but the movie table was the PAL one whatever disc was mounted, so on an NTSC disc every stream after the first pointed into the wrong place and each movie stopped around halfway. The table is read off the disc that is actually there now.
The Windows build works again. Three files compiled for the PS1 layer had come to include SDL, and on Windows its headers and the PS1 compatibility header come apart inside the toolchain intrinsics. Nothing compiled for that layer includes a host header any more.