Previously the quality downgrade only ran when the requested quality
was UltraHiRes and only tried a single step down to HiRes. Since Qobuz
returns up to 96 kHz content for both UltraHiRes and HiRes tiers, that
single step was a no-op for DACs that top out at 48 kHz (e.g. Vanatoo
Transparent Zero, many entry-level USB DACs): playback still failed
with the misleading 'Device not found' error.
This change iterates down the quality ladder after checking the
actual stream sample rate, continuing to Lossless (44.1 kHz) when
HiRes still produces an unsupported rate. Applies to both the current
track (v2_play_track_with_options) and prefetched tracks
(spawn_v2_prefetch).
Lossy MP3 is never selected automatically — if even Lossless is
unsupported, the stream continues at the original rate and Fix 2
(software resample fallback) takes over.
cc
vicrodh
d7c8119953