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diff --git a/src/i_sound.h b/src/i_sound.h
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+/* Emacs style mode select   -*- C++ -*-
+ *-----------------------------------------------------------------------------
+ *
+ *
+ *  PrBoom: a Doom port merged with LxDoom and LSDLDoom
+ *  based on BOOM, a modified and improved DOOM engine
+ *  Copyright (C) 1999 by
+ *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
+ *  Copyright (C) 1999-2000 by
+ *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
+ *  Copyright 2005, 2006 by
+ *  Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ *  02111-1307, USA.
+ *
+ * DESCRIPTION:
+ *      System interface, sound.
+ *
+ *-----------------------------------------------------------------------------*/
+
+#ifndef __I_SOUND__
+#define __I_SOUND__
+
+#include "sounds.h"
+#include "doomtype.h"
+
+#define SNDSERV
+#undef SNDINTR
+
+#ifndef SNDSERV
+#include "l_soundgen.h"
+#endif
+
+// Init at program start...
+void I_InitSound(void);
+
+// ... shut down and relase at program termination.
+void I_ShutdownSound(void);
+
+//
+//  SFX I/O
+//
+
+// Initialize channels?
+void I_SetChannels(void);
+
+// Get raw data lump index for sound descriptor.
+int I_GetSfxLumpNum (sfxinfo_t *sfxinfo);
+
+// Starts a sound in a particular sound channel.
+int I_StartSound(int id, int channel, int vol, int sep, int pitch, int priority);
+
+// Stops a sound channel.
+void I_StopSound(int handle);
+
+// Called by S_*() functions
+//  to see if a channel is still playing.
+// Returns 0 if no longer playing, 1 if playing.
+boolean I_SoundIsPlaying(int handle);
+
+// Called by m_menu.c to let the quit sound play and quit right after it stops
+boolean I_AnySoundStillPlaying(void);
+
+// Updates the volume, separation,
+//  and pitch of a sound channel.
+void I_UpdateSoundParams(int handle, int vol, int sep, int pitch);
+
+//
+//  MUSIC I/O
+//
+void I_InitMusic(void);
+void I_ShutdownMusic(void);
+
+void I_UpdateMusic(void);
+
+// Volume.
+void I_SetMusicVolume(int volume);
+
+// PAUSE game handling.
+void I_PauseSong(int handle);
+void I_ResumeSong(int handle);
+
+// Registers a song handle to song data.
+int I_RegisterSong(const void *data, size_t len);
+
+// cournia - tries to load a music file
+int I_RegisterMusic( const char* filename, musicinfo_t *music );
+
+// Called by anything that wishes to start music.
+//  plays a song, and when the song is done,
+//  starts playing it again in an endless loop.
+// Horrible thing to do, considering.
+void I_PlaySong(int handle, int looping);
+
+// Stops a song over 3 seconds.
+void I_StopSong(int handle);
+
+// See above (register), then think backwards
+void I_UnRegisterSong(int handle);
+
+// Allegro card support jff 1/18/98
+extern int snd_card;
+extern int mus_card;
+// CPhipps - put these in config file
+extern int snd_samplerate;
+
+#endif