Partner preempts your void as usual. Do you dig a little further, or pass and hope LHO balances?
Partner's style: He'll always have a 7 card heart suit, QJTxxxx or better. Always 6-10 points (not necessarily in hearts!). Never 4 spades. Possibly a 4 card minor.
New suit by you is forcing for one round.
Also, if it affects your decision, partner is (shall we say) not the best declarer in the world...

Help

3♥-(P)-?