qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value);
void S_SetChannelVolume (unsigned int ch_ind, float fvol);
float S_GetChannelPosition (unsigned int ch_ind);
qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value);
void S_SetChannelVolume (unsigned int ch_ind, float fvol);
float S_GetChannelPosition (unsigned int ch_ind);