Pitch Black

The puzzle consists of the 9 rooms arranged in a circle, each of which contains a minipuzzle involving sound. Each room can be solved independently.

Each room will end up extracting to a single letter.

(this is for the lower room on the left edge)

There is a single sound in this room moving around in the shape of a letter. It may be useful to either stand in a single place and hear when the sound passes by you, or try to "chase" the sound around the room.

(this is for the upper room on the left edge)

Each of the noises you hear corresponds to one of the colors red, white, or blue. These form maritime signal flags.

(this is for the left room on the top edge)

You'll want to use braille here.

(this is for the middle room on the top edge)

This room represents the home page of a certain website.

(this is for the right room on the top edge)

In this room, each sound can appear in two possible locations; if you walk to the location a sound is currently at, it will teleport to the other.

This lets you draw lines between the pairs of locations.

(this is for the top room on the right edge)

This puzzle is a 5x5 grid with a crossword clue being read in each row and column. You can solve the clues and write the answers in a 5x5 crossword, and then take the middle letter (which is the only square you can't walk through in the room).

(this is for the bottom room on the right edge)

Each tone (well, 4 of the 5 tones) makes the shape of a letter. The 5th tone makes the shape of an underscore or blank, which indicates a letter you can fill in to make a 5 letter word.

(this is for the middle room on the bottom edge)

The sound that plays depends only on which direction you're moving in (there are 7 possible directions).

You want to move in such a way that you correctly hear the first ~5 seconds of Never Gonna Give You Up.

(this is for the left room on the bottom edge)

This represents a certain board game. All the squares with dings on them share a single letter.

Read the letters in clockwise order, picking an appropriate starting place, to get the final answer.