> There’s a reason we don’t color code piano keys or write the names of the notes on them.
When's the last time you learned to play piano? Yes we do. We take off those training wheels at some point but when learning to play for the first time, especially as a child, tools to help learning like the aforementioned do get used.
A couple of times. I learned initially as a kid, then in college I took two semesters of piano, then in the last year I’ve delved heavily into keyboard playing.
I taught my 5 year old where C was and it took about 2 minutes.
> We take off those training wheels
Training wheels are an apt metaphor because they are a similarly wrong way to learn to bike. You get quicker initial results, but have to unlearn to use those crutches later on.
What qualifies you to speak to the usefulness of techniques you've never personally used? Being able to learn without them doesn't mean they don't help in learning.
> I taught my 5 year old where C was and it took about 2 minutes.
Just 87 more keys to go! At 2 minutes per, only 2 hours, 52 minutes until they're playing Mozart's. Now if only that's how it actually works.
> the app is much cheaper and should work with any real instrument.
Maybe if your instrument has keys or frets. Even if it was a good way to learn, it wouldn’t do much good for a trumpet.