midi piano filtering (only allow notes that fit into the chord being played)

"[email protected]" <[email protected]> Wed, 16 May 2018 17:39:37 +0200 (CEST)
Newsgroups gmane.linux.lfs.general
Message-ID <5967444.20475.1526485177487.JavaMail.defaultUser@defaultHost>
Hi All,
I suck at playing the piano. 
I was wondering if there's a program out there that can load the chords of a song, so that it blocks all the notes from a MIDI keyboard, except the ones that fit into the chord being played?
Does something like this exist?
Cheers,
Cedric

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