Keysight

It does exactly what it says. Visualizes every key press of a MIDI keyboard. I'm still scratching the surface of the of the options because there are A LOT.

I find it a little misleading to have sound in the trailer without a message saying that it produces no audio. I'm aware it says so in the description, but a lot of people don't read descriptions, and for 30 bucks I feel there should be the option to play sound. The wiki states it's due to "not being able to deliver high quality and low latency audio sufficient for live performance or recording", but a lot of people don't really mind that. Some of us just want software to practice piano and that also looks beautiful. I was able to run an instrument in FL Studio while running Keysight, and the audio sounded great, so are you sure you can't add sound? Perhaps in a separate window?

It's a great solution let down by a cumbersome user interface. I think perhaps that's a limitation of using the Unreal Engine to develop the app.Ideally I'd like to be able to split the piano down the middle and have notes above middle C in one colour and below middle C in another, like in Synthesia and SeeMusic but there doesn't seem to be a way of doing this. With a bit more development this could be a killer app.It's probably the best affordable alternative to SeeMusic.