sight-read

Comment often left after a score on beatmania IIDX and other games from bemani on trackers such as Solid State Squad. This diserves to tell how good you are if you get a AAA, or else how good you are because you have only seen the chart once.
If the player loves himself, he can also add a period, reinforcing his amazing skills.

X Player on S3: "Sight-read."

Sight reading

When a band performs a piece of music they've seen for the first time and have to listen to each other and adjust on the spot, typically in front of a judge or some form of evaluation.

"Ms. Smith signed a sight reading along with scale test."