Download < http://www.mechmod.com/team/pcjoe/fmod.dll > and install to your default half-life directory.
Steam://
C:/Program Files\Steam\SteamApps\Your.email.here\half-life
Won://
C:/Sierra/Half-life
Hope this helps some of you.
Steam://
C:/Program Files\Steam\SteamApps\Your.email.here\half-life
Won://
C:/Sierra/Half-life
Hope this helps some of you.