I'm a noob to linux (Raspberry Pie) so i'll not be doing that anytime soon.
It's actually a really bad idea to modify a linux text config file with a rich text editor.
The best option is to use a linux text editor (vim, nano, ...), or a simple MS notepad (or better, notepad++).
You're lucky only the sound was impacted :)
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@actnash, tried just just now...still no go :(