How I learned to write music in real time
omnisplore.wordpress.com
omnisplore.wordpress.com
This leads me to believe that absolute pitch is probably nothing more than excellent pitch memory, which further leads me to believe that it is probably learnable and not genetic (beyond any genetic predisposition for general musical skill). That said, I suspect it Is vastly easier to learn at a young age, just as are human languages.
Here's the best video[0] on Perfect Pitch I've seen. It starts at 4:25 because he spends the first four minutes responding to indignant youtube commenters. Then he digs into the science.
I can describe what it's like, but I honestly feel anyone can learn it with enough practice. (Never put it to the test though.) It's simply like reinforcement learning of being able to hit a note in a certain position. When you hit it too high or too low, you correct yourself, until you have a memory of where you are supposed to hit it properly. With children I am sure a lot of the "tuning" happens over multiple repetitions due to being exposed to the combination of "fa", "sol" or "the start of star wars" always referring to the same thing.
I think you could teach your kids the perfect pitch by having them sing songs with "do re mi" terminology (or possibly ABC-G but that's a bit worse because it's not a natural major scale) and having them do it over time adjusts their brain's "predictions" of where they should hit the note. If they deal with music all the time they'll be able to do it. It's similar to picking the right vocal tone for a situation or a basketball player knowing how to shoot a ball after many tries. A tennis player hitting a ball is a bit harder because the action must be a function of the input.
Now, as I got older, switched careers and have been away from singing / playing music for a few years, I can report that my perfect pitch is still there but "modulated down" almost a half-step. So when I want to sing "do re mi" or a theme that I know is with D minor, I sometimes do it a half step lower. When I listen to that piece, it sounds a half step higher. (I am 34.) However, a few seconds of reinforcement learning that "no, this is D minor" and suddenly everything snaps back and I have perfect pitch again.
I believe that reinforcement learning across perfectly tuned instruments and songs all around is is what causes perfect pitch. So I always thought that, with enough exposure to music and having to sing the songs using do re mi instead of the words etc. anyone can form those associations and "tune them". Well, anyone who isn't lacking the brain capacity for tuning their pitch or actions or whatever. I would say that's more than 1 in 10,000 people. It just needs similar skills to motor coordination.
https://musescore.com/rebeccayang/no-14-rainbow People with this condition can write so called "rainbow songs" that look like a rainbow to them.
I peppered them with questions- I asked how long they've had it and they explained that they learned music (piano) at a very young age. They can recognize a single note, even chords. They can also be given a note to sing. I asked if they needed to hear other notes in order to distinguish it and they said no, they can hear a single note and know exactly what it is. I have always been fascinated by this.
Not related to perfect pitch, but I've trained myself to somewhat replicate this through relative pitch. I quitely hum to myself the lowest note I can (which just happens to be a C natural), and from there I can mentally step up and down the scale chromatically to find whatever note I need. I'm accurate to about a half step but no more than that, sad to say.