is there a way to close the audio files once they've been opened?

[nicb]

Thank you for this sweet little gem! It is very useful to me. There is only one feature that I miss (unless I have really misunderstood): a way to close the files that get opened by <open_read> and <open_write>. Not that it's really important, but if you test for size on a trimmed file, for example, you won't be able to really test the size because the file gets closed (and therefore comes to a definite size) only after the end of the test (obviously too late).

I did not add this feature myself because I am not sure that I am not missing something here. However, it's a very easy patch and I will be glad to contribute it if it is deemed something useful.