Used these can be found for cheap, and short of MPE, hammer action, and a build for touring these might have everything a MIDI controller needs.

Layers, splits, onboard programmability, plenty of controls, DIN ports, USB, and afterfouch (but like the author's keyboard, the faders are always missing the custom keycaps for the non-standard size fader stems).

They are a plastic fantastic in gorgeous oughties silver.

OP if you want to improve sight reading faster, I would recommend using non-random notes - context is very important when sight reading and if you get a professional pianist to sight read random notes they will be much, much slower.

Sight reading factory is one site I know that does this a bit better

I imagine it would be far more engaging (but also far more complicated) to tap into an archive of songs and present those randomly, either selected by or transposed into the key that you want to practice.

I'm a fairly average pianist, but sight reading is a (relative) strength. Being able to play random notes is definitely part of it, but I think for me sight-reading is more about getting a sense of the gist of the music (a lot of pattern matching of common phrases, cadences, hand positions etc) - this is kind of subconcious, then my focus is on keeping my internal version aligned with what's on the page (spotting where the written music is doing something different or interesting and making sure you hit those notes). The latter part would definitley improve by practicing random notes, but the first bit is more akin to improvisation - you've got some lossy, distilled version of the music in your head (from memory or from your first mental parse of the full manuscript) and you're trying to recreate it (or expound on it).

I think what really helped my reading was having lots of cheap/free sheet music on hand and just trying to play it (simplifying massively if needed, but trying to get the sense of it, even if only playing 20% of the notes)

It was mentioned the person was trying to memorize all these with anki or something. There's actually no need. You only need to memorize 2 key signatures and the rest follow a pattern.

C major has 0 sharps/flats F major has 1 flat

Every sharp key is a half step up from the last sharp shown. G major has 1 sharp F#. G is a half step up from F#. In A major the last sharp is G#, etc.

In flat keys, it's the second flat to the right. Bb has two flats in the signature. Bb and Eb. Ab has 4 where Ab is the 3rd.

All minor keys are a minor third down from their major key. Of course, you have to look at more of the music to determine if it is a in major or minor key.

If you can remember that you can tell what any key signature is pretty quickly.

Is this what self-taught looks like? I have never heard of that mnemonic and it was never hard to learn the order of sharps/flats in a key signature. You just look at the way it's written on the staff - two lines of sharps a 4th apart going up progressively, two lines of flats a 4th apart going down progressively.

I don't want to discourage the guy, but practicing every day for 4 years straight and he's only gotten to 60bpm... there are better methods to learn piano sight reading.

Edit:

I used singing in quotes because you only really intonate (generate an accurate pitch with your voice). You don't learn actual singing technique.

b. What does GAS mean?

I want to sight-read chords, chord progressions, and other patterns, and get better at playing those.

Thanks for writing this up, I'm definitely going to incorporate this into my practice routine