I saw in Dosbox pages: 'With DOSBox 0.72, I am able to run Fallout smoothly with sound. You must disable the GUS support by specifying gus=false in dosbox.conf. Then run the sound.exe setup utility in the fallout root folder, and autodetect your soundcard. This should now recognize a SB. Test the sound then exit/sav.' Maybe GUS emulation is tougher than SB, and above could help