The filigramophone is hardware/software digital instrument.
The hardware part consists in a pen tablet embedded in a wooden case with piezzo microphones and acoustic transducers.
The software part is constantly evolving. It includes a synthesis engine allowing several synthesis sources (granular, FM, etc.), as well as spectral convolution between audio signal received from the piezzo microphone and the synthesis engine. The piezzo+acoustic transducer also allows for controlled feedback effects. And that is sweet.
Source code will be available as soon as the patch is no longer a mess of wires between undocumented modules. The filigramophone is mostly my own instrument but feel free to contact if you are interested in getting or building your own!