[XStormiest]

pawn Код:

public OnPlayerConnect(playerid)
{
    if (APlayerData[playerid][PlayerLevel] >= 5) //You must modify this line,change it to make it work with your admin system.
    {
        for(new i = 0; i < MAX_PLAYERS; i++)
        {
            if(IsPlayerConnected(i))
            {
                StopAudioStreamForPlayer(i);
                PlayAudioStreamForPlayer(i, "Put here MP3 url link" );
            }
        }
    }
    
    return 1;
}

serious? 0/10.....
this will stop the music...and after start it...
and this is just a snippet...not an entire filterscirpt
sorry man but all can do this and more easy
suggestion:
use foreach( loop more faster)