Did you try shifter~ (http://julovi.net/j/?page_id=7)?
This is a Pd PSOLA pitch shifter I ported from Max/MSP. Developed originally by Tristan Jesen and hosted here.
I found it faster than SSB, and format friendly.
I hope it helps.
Julian Villegas (http://julovi.net) Me pregunto de un modo pensativo Que significa ser Colombiano? No se le respondi. Es un acto de fe JLB.