Version 0.8.2 is noted for being one of the least laggy versions of the software, making it a preferred choice for users who play high-density "Black MIDI" files that would otherwise crash newer, more resource-heavy versions.

While 0.8.2 was built for older systems, current versions of Synthesia support . If you are using a modern device, newer versions offer much better stability, support for high-resolution displays, and improved MIDI device connectivity. Synthesia | Black MIDI Wiki | Fandom

The "Melody Practice" mode is perhaps the most vital feature. The song will literally stop and wait for you to hit the correct note on your MIDI keyboard before moving forward. This removes the stress of keeping up with a fast tempo before you're ready. 3. Finger Number Hints

Repeatedly practice a difficult bridge or chorus until you have it down. Why "Portable"?