Auto-synchro: music-based audio+input latency calibration technique

[dtinth]

Connects to #87.

[coveralls]

Coverage remained the same at 98.97% when pulling bf8552e on autosynchro into 18265a0 on master.

[akibot]

Hello! Thank you for sending us patches!

I am an automated bot to lint pull requests to detect potential errors and check for consistent coding style, and I found some problems with your code submission in the commit 6aa2daa:

• src/auto-synchro/index.js
  • line 38, col 12: 'music' is defined but never used. (W098)

Please fix these problems, rebase your commits, then leave a comment here so that a human can further review your patch.

As an additional step to prevent future lint errors, please run npm lint before committing. A Git pre-commit hook is available.

[coveralls]

Coverage remained the same at 98.98% when pulling 62ed492 on autosynchro into 8f91242 on master.

[dtinth]

Calibrating the value of _A_

Methods

• Play a song and instruct user to press the button on every beat.
• Record at least 56 samples of _A_ (time that keypress is registered - time that sound is emitted)
• Analyze the recorded samples.

[coveralls]

Coverage remained the same at 98.98% when pulling 6175364 on autosynchro into 8f91242 on master.