For 6 months the fanfare had a workshop where we built many different styles of musical instruments.
From contact microphone-amplified percussion instruments to simple bamboo trumpets.
We did everything ourselves and in an autodidactic manner.

Here are some of the primitive techniques we used for:
For raw goat skins
For copper plates and tubes
Metaal op Maat
General instrument supplies
Electronics (specialised in guitar effects) (based in rotterdam)
Usefull links for supplies in the Rotterdam area