play move sound everytime a new move is received or a move is selected

[0Xero7]

Plays the Lichess move sound when:

• we receive a move for the currently selected game
• user moves to a different move

Uses the Lichess move sound found here.

[0Xero7]

@mooskagh could you review this please? Would be great if it gets in before/during today's match.

[mooskagh]

Thanks for the PR!

I did see it, but I'm not sure it would play sounds at the correct times. I didn't have time to comment it in more details unfortunately.

E.g. it clicks when you browse previous moves, while it only should do it if you advance in the movelist.

Also it appears to play the sound twice (when the move is received, and when the move has changed in the UI).

Also I couldn't quickly look up the license for the sound file (i.e. whether I need to credit the author and if so, who would it be), so I considered remaking the sound myself -- but again didn't have time.

[mooskagh]

For now you can open Lichess at https://lichess.org/broadcast/fide-world-championship-2024/game-2/YL0LEwAL/AljZUNDm in another tab and it will have a move sound. :-P

live.lczero.org takes the moves from lichess, so the moves will be synchronized.

[0Xero7]

I have fixed when the sound plays and verified it locally. As on Lichess, it now only plays the sound if we move forward by 1 ply. I've also made it easy to add other sound effects (for checks, captures, etc) later, if needed.

For the sound license issue, looks like all the standard sounds are classified as non-free 😔.

I did however, find this sound effect, which is CC0 but needs a little editing.

PS: While testing, I noticed that selecting move[index+1] plays move[index] on the board. For example, if the moves are 1. e4 e5, then you have to select e5 on the movelist to see e4 played on the board. Is this intentional?

[0Xero7]

Fixed the licensing issue by using the previously mentioned CC0 move sound.