What's the limit of difficulty possible on a keyboard?

[Brennan47]

I've seen videos of people passing songs which contain 300 BPM 16th streams. I've heard of a 325 BPM stream song but I don't know if anyone has passed it.

What do you think is the upper limit on what is possible on a keyboard?

[Raikou Rider]

Originally Posted by Brennan47

I've seen videos of people passing songs which contain 300 BPM 16th streams. I've heard of a 325 BPM stream song but I don't know if anyone has passed it.

What do you think is the upper limit on what is possible on a keyboard?

Thaor has passed #est on 1.6 rate, which is 400+ bpm 16ths.

[Hiryuu]

Ask Data from Star Trek.

[Patashu]

The hardest passes I'm aware of are reincarnation oni, minami ikeburo hardcore custom oni and wtf heavy. Stuff like data drain and cetaka's rain are up there too.

Here are some videos of absurdly fast stream:

YouTube - samtorx - Vertex Delta 8 misses - 300 bpm
YouTube - Disregard 1.1 AA - 330 bpm
YouTube - sharpest 1.3x - 351 bpm
YouTube - Thaor playing Sharpest Heavy 1.4x rate - 378 bpm

EDIT: And arch0wl's said that disregard 1.1x is probably possible index.