and this is a quick demo of the five dollar keyboard, the new project will include the filter, arp etc etc from both projects its just a question of whether more people would build a donor keyboard version or a donor stylophone version ?
Ancient analogue stylus synth. Around christmas they normally have a promotion and sell them for 10 GBP which is reasonable as a donor enclosure, speaker, amp and keyboard/keypad/keystrip ? for an Arduino based synth.
They could sound much better with an Arduino inside.
A musical instrument popularized in the 1960's by Rolf Harris, who's catch phrase "can you tell what it is yet?" strangely has not appeared in his current court case.