MIDI is easy just go to the piano roll view and extend the notes: this will work unless you have a sound with natural decay that doesn't last the entire measure.

RealTracks has holds that may work.

If holds and/or MIDI with short natural decays you can convert the MIDI to audio then using Melodyne you can extend both RealTrack and audio:

https://www.celemony.com/en/start


I think my wife has started to show the first signs of dementia.
She said she can't remember what she ever saw in me!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware