In acoustic musical instruments of the Agitation Chambers family, sounds that are initially rough and pitchless go through a kind of acoustic filtering to create tones that are clear in pitch but still have some of the character of the original sounds. This idea can take many forms, and several very different variations appear in this video.
For more of Bart's instruments, look for additional videos in the Bart Hopkin youtube channel or visit the Instrumentarium at www.BartHopkin.com.
Bart has also recently released an album of his music, made primarily on instruments he's made. It's called Audiorium, and it's available through the usual download and streaming services. More info at https://barthopkin.com/audiorium/.
