[LAU] Check compliance of SF2 soundfont

[Alexandre DENIS]

Hi,

I bought samples from Dubsounds in SF2 format, and looping is wrong
when rendering with fluidsynth. I'm wondering how to check whether this
is caused by buggy files or a bug in fluidsynth.

The symptoms:
-- in fluidsynth (command line, qsynth, Calf plugin, or Carla), I can
hear that looping is wrong -- there is obviously a gap
-- in swami, the start loop point seems ok, but the end loop points is
beyond the end of sample. When loading the soundfont, it spits a bunch
of "libInstPatch-WARNING **: Invalid loop for sample" on the console
-- in polyphone, it loads and plays ok. Loop points are perfect.

Is there some extension or advanced feature that polyphone supports but
not fluidsynth nor swami? How may I know who is the culprit?

Here is the output of sf2dump: http://pastebin.com/CthdwrQf

Thank you,
-Alexandre.

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