LDAC is Sony's wireless audio codec that transmits up to 990 kbps over Bluetooth, three times the standard SBC rate, enabling near-Hi-Res audio quality on supported devices.
LDAC (Low latency Audio Codec with Delayed Audio Codec — branding is awkward, originally "Low latency Data and Audio Codec") is Sony's proprietary Bluetooth codec designed for high-quality audio streaming. It operates in three bitrate modes: 330 kbps (low bandwidth / interference recovery), 660 kbps (balanced), 990 kbps (high quality). At 990 kbps, LDAC transmits 24-bit/96 kHz audio wirelessly, approaching Hi-Res audio standards (typically defined as 24-bit/96+ kHz or higher). SBC (standard Bluetooth fallback) uses only 328 kbps, so LDAC achieves 3× bandwidth for audio.
**How LDAC achieves high bitrate over Bluetooth technically:** Bluetooth EDR (Enhanced Data Rate) maximum throughput is ~3 Mbps per link, but accounting for protocol overhead and error correction, usable audio bandwidth is ~1.2 Mbps. LDAC uses adaptive bitrate: it monitors RF conditions and switches between 330/660/990 kbps dynamically — if interference detected, drops to 660 or 330 to avoid cutouts. LDAC uses low latency codec design (~200 ms end-to-end latency, acceptable for music, too high for gaming). Frequency response: LDAC at 990 kbps / 96 kHz captures all audible frequencies (20 Hz – 20 kHz) + ultrasonic detail (inaudible but preserved for professional use).
**Why it matters to buyers:** Audio enthusiasts with high-end headphones (£400+) and Android devices notice improved clarity, wider soundstage, and reduced compression artifacts when using LDAC vs AAC/SBC. On budget headphones or via lossy source (Spotify 320 kbps MP3), improvement is minimal or inaudible. iPhone users cannot use LDAC (iOS only supports AAC at 250 kbps) — Apple's spatial audio focus is different from hi-res audio focus. Music streaming services rarely offer Hi-Res masters (Apple Music Lossless is exception), limiting LDAC's real-world benefit.
**What to look for / common pitfalls:** - LDAC requires Android 8.0+ phone with LDAC support (Snapdragon, Kirin, Exynos, MediaTek most chips) - Headphones must list "LDAC support" explicitly - 990 kbps mode needs stable RF (no interference); 660 kbps more reliable - Music source must be Hi-Res or lossless (FLAC, WAV); compressed lossy (MP3, AAC) doesn't benefit - Test blind: most listeners can't distinguish LDAC from AAC on consumer headphones - Battery drain: LDAC slightly higher than AAC due to higher bitrate processing
Real-world 2026: Sony WH-1000XM5 (full LDAC support), OnePlus 12 (Snapdragon Sound, LDAC support), Samsung Galaxy (Exynos/Snapdragon varies by region, many support LDAC), Apple iPhone 15 (no LDAC, AAC only), audiophile setup with FLAC streaming (Tidal HiFi Plus, Qobuz) realizes LDAC benefit.