I didn't like the sound much either. For live play sound is OK, but it seems kind of out of place/grating now for online games.
Sound
This might be redundant, but sound's come up in the tactics trainer too - I think the sounds are great, but just not a fan of them in certain settings.
I absolutely despise any website that generates sounds by default unless and only unless it's something I ask it to do. I generally am listening to music and unexpected sounds really irk me. Sounds should be a user option that should default to off in all contexts. Nothing about chess requires noise.
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There is now a sound when moving pieces in Online chess - main board, analyze and explore - and no way to turn it off. Only way to get rid of it is to turn of the beta.