Reads the GUANO metadata of a WAV file, or of a Wave object that carries it. GUANO is the metadata format used by many bioacoustic recorders, including AudioMoth devices running current firmware. A file holding no GUANO metadata gives an empty result rather than an error. A WAV file over 4 GiB, written in the RF64 or BW64 form, is read as any other.
References
Riggs, D. GUANO: Grand Unified Acoustic Notation Ontology. https://github.com/riggsd/guano-spec
