Do use the stock Apple dongle (it’s limited to 24-bit/48kHz, fine for CD quality but not future-proof). Instead:
To truly unbreak the code of this album, you need the FLAC. You need the silence between tracks to be silent (not compressed). You need the high hats to shimmer rather than sizzle. Backstreet Boys - Unbreakable FLAC Lossless.21
This is an audio coding format for lossless compression. Unlike MP3s, which discard data to save space, FLAC preserves 100% of the original audio data from the CD source. Do use the stock Apple dongle (it’s limited
This track is aggressive. The snare drum is compressed within an inch of its life. On a standard Bluetooth speaker via MP3, the snare just sounds like "thwack." On a FLAC played through a DAC (Digital-to-Analog Converter), you hear the transient: the sharp attack of the drum stick, then the metallic ring of the snare wires, then the room ambience. The ".21" quality preserves that transient rise time (measured in microseconds) which lossy codecs smear into white noise. You need the high hats to shimmer rather than sizzle
is essential. Unlike standard MP3s, which compress audio data and strip away subtle frequencies, a lossless format preserves the full dynamic range of the studio recording. Harmony Clarity