Also nice:
https://www.electrosmash.com/pedalshield-mega
or with a Pi zero:
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Hello,
as some know, I have a similar design for Raspberry Pi.
I created a repository in github by grouping similar projects. Among those who have posted here (or in other posts), I believe that PedalPii has not been. (note that it is another project with a fairly similar name)
If you are interested, the full collection I have found is at:
Feel free to send pull requests.