Hi,
I would like add a midi synchro to Boss RC-20 pedal (a fabulous looping effect for instrument but no midi signal)
I 'm not an electronic tech, and I ask me if add midi is possible on this system ???
I know a led blink in tempo on pedal, maybe it is a interresting point to wired…
If u have an idee and if u think it is possible to plug something into the pedal I’m interessting ;D
Thanks
Basstien
Hi,
If you want RC-20 to follow midiclock from external device, you could use something like DINer (http://www.angelfire.com/geek/srlabs/diner.html) to send steady stream of quarter note pulses, and wire transistor as switch between contacts of the RC-20’s tap tempo button 
Only problem is that those pulses must be disconnected, if other (manual) tempo than from midi stream is wanted or if time signature needs to be changed.. ;)) I think that stopping device sending midiclock works for this… (ie. DINer doesn’t send pulses, when “MMC stop” command is recognised)
– Then, if you want rc-20 to be master clock, ie. sending midi clock.. well. I think you are a bit out of luck.. I haven’t came across “diy tap tempo” projects.. (Of cource someone with coding skills could realise that too)
Bye, Moebius
modify: UUps
This page describes how to get a gate signal from any flashing led. It should only require a simple mios app to convert that signal to a midi clock. I unfortunately cannot offer to code the app for you, as I haven’t learned how to do so yet.