[Jonny5]

IsPlayerInRangeOfPoint has a set x,y,z
you should use the ones in your function xx, yy, zz

pawn Код:

forward PlayAudioStreamForPoint(url[], Float:range, Float:xx, Float:yy, Float:zz);
public PlayAudioStreamForPoint(url[], Float:range, Float:xx, Float:yy, Float:zz)
{
    for(new i = 0; i < MAX_PLAYERS; i++)
    {
        if(IsPlayerConnected(i))
        {
            if(IsPlayerInRangeOfPoint(i, range, xx,yy,zz))
            {
                PlayAudioStreamForPlayer(i, url);
            }
        }
    }
    return 1;
}

//use it in a timer
SetTimerEx("PlayAudioStreamForPoint",1000,true,"sffff",url,xx,yy,zz);

I removed the playerid argument as your looping threw all the players,