[FEATURE REQUEST] UTF-8 Preset Names

[sylvia-leaf]

Is your feature request related to a problem? Please describe.
Spessasynth cannot decode preset names that are in UTF-8; it can only work with Ascii characters. This is a significant problem as some users may want to use Kana or CJK characters (Kanji) in their preset names.

Is your feature related to the sound library or the app/website?
App/website

Describe the solution you'd like
Make sure that preset names entered in UTF-8 render correctly.

Describe alternatives you've considered
SFe only recently included UTF-8 support for preset names (4.00.9), so nothing.

Additional context
SFe 4.00.9 now permits the use of UTF-8 in preset, instrument and sample names. Previously, UTF-8 was only permitted in the info-list chunk and not pdta.

[spessasus]

This is going to be a problematic one. You see, the soundfont parser has to woth both in the main thread and the AudioWorklet thread. The latter of which doesn't have the TextDecoder interface available, so currently spessasynth just uses String.fromCharCode

So the only way would be to implement our own UTF-8 decoder.