A voice allocator external in Pd. [voicepool] is used as part of my Pd project about Audible Ecosystemics no. 3a of Agostino Di Scipio: https://agostinodiscipio.xoom.it/adiscipi/index.html
Source code and Linux, OSX and Windows binary are provided.
Pd-lib-builder is used as Makefile: https://github.com/pure-data/pd-lib-builder