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I've got a micro USB to OTG adapter to USB-B with which I can connect my Android tablet to a Casio keyboard. On some apps such as WalkBand I can play on the keyboard and the app receives the MIDI events and plays them in the app as well, and can even record them.

However, at this point I want to actually do something with the MIDI notes besides just be able to play them. I want to see them on a piano roll, and maybe even as sheet music, and be able to from the piano roll edit, either to move notes around, adjust the length, snap them to the appropriate 1/4, 1/8, 1/16 etc. (this would be a batch operation) as well as add and remove notes.

Can be free or for pay.

  • This is called a MIDI sequencer. – CL. Mar 4 '17 at 9:35
  • Not tried myself, but take a look at Audio Evolution (link to the free trial). Its full version is available for ~EUR 7. – Izzy Mar 4 '17 at 10:10
  • @Izzy Thanks for the suggestion. Do you know how much the in-app store charges for MIDI support? It's confusing that you would have to pay more for this after already paying $7 for the "full version". – Michael Mar 5 '17 at 19:28
  • No idea, unfortunately – as I wrote, I've never tried it myself. Maybe approaching the dev? – Izzy Mar 5 '17 at 19:28
  • @Izzy seem to have some issues editing as well... the documentation isn't matching what I am seeing (for editing it shows a different color scheme, and I can't seem to select or edit notes in edit mode). – Michael Mar 5 '17 at 19:30

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