ref: d9f9a3b411eb5c2a33527c8a78fa902e07cddd95
dir: /BUGS/
* Sound may not set volumes correctly. It is possible that volume of sound effects does not scale properly with distance from the sound source. It is also possible that sound effects are cut off at the wrong distance. This needs further investigation. * Music plays back differently. Vanilla Doom was typically played with a SoundBlaster (or compatible) card. It programmed the registers for the OPL music chip directly in order to emulate the various General MIDI instruments. However, Chocolate Doom uses the OS's native MIDI playback interfaces to play MIDI sound. As the OPL is programmed differently, the music sounds different to the original, even when using an original SoundBlaster card. This can be worked around in the future: OPL emulation code exists that simulates an OPL chip in software. Furthermore, depending on the OS, it may be possible to program the OPL directly in order to get the same sound. * A small number of Doom bugs are almost impossible to emulate. An example of this can be seen in Ledmeister's "Blackbug" demo which shows a bug that relies on the memory layout of the Doom executable.