[godoy32]

Deberнa ser algo asн

pawn Код:

public OnPlayerStateChange(playerid, newstate, oldstate)
{
    if(newstate == PLAYER_STATE_DRIVER || newstate == PLAYER_STATE_PASSENGER ) PlayAudioStreamForPlayer(playerid,"Aqui el link");
    if(newstate == PLAYER_STATE_ONFOOT) StopAudioStreamForPlayer(playerid);
    return 1
}
//Cambia "Aqui el link" por tu link de la cancion.

Es casi lo mismo que puso [R]hysi