kaldi

One can use https://github.com/s-yata/marisa-trie to save a lot of space for symbols.

Describe the bug
When clicking on the video player to pause, the state of the play button doesn't update accordingly.

Additional context
@pietrop this was introduced during your layout changes - due to 're-wiring' of the components but an easy fix

Although Lhotse does not enforce immutability for manifest objects, it (almost?) always treats them as if they were immutable. In many places, we have this idiom e.g. fastcopy(cut, features=Features(...)) to create a modified version of an object without actually modifying it. I think it makes sense to add a method .copy_with(**kwargs) to such classes, so it's a bit more convenient to use (doe