Bluetooth Codecs 101: AAC, SBC, LDAC aptX Explained
Both the ES20 and ES60 feature MEMS microphones—tiny silicon-based sensors that are a major leap forward from traditional condenser microphones. Paired with intelligent noise cancellation, these microphones don’t just capture sound, they analyse it. They recognise the difference between your voice and background noise, filtering out distractions so your calls sound as natural as possible. It’s like carrying a personal sound engineer wherever you go.
Overview of Bluetooth Codecs
A Bluetooth codec compresses audio so it can be sent wirelessly, then decompresses it on the receiving end. It’s a translator for sound—what it does (and how well it does it) affects clarity, delay, and even battery life. If you’re using Bluetooth speakers, headphones, or earbuds, the codec matters more than you think.
5 Most Widely Used Bluetooth Codecs
SBC (Subband Codec)
This one’s the most basic. It’s built into every Bluetooth device, so it always works—but it doesn’t sound amazing. Good enough for calls and casual music, but if you care about detail, there are better options.
Use it if: You just want things to work without thinking about them.
AAC (Advanced Audio Coding)
AAC is what Apple uses on iPhones and iPads. It also works with YouTube, Spotify, and more. On Apple devices, it sounds pretty good. On Android, not always—it depends on the phone.
Use it if: You’re on an iPhone and want solid sound for everyday use.
aptX (and aptX HD, Low Latency)
Made by Qualcomm, aptX is better than SBC in most cases. It comes in a few versions:
• aptX – Better than SBC
• aptX HD – Higher quality
• aptX Low Latency – Faster response for videos and gaming
Use it if: You’re on Android and want better-than-average sound without going overboard.
LDAC
Sony’s LDAC is the current top-tier option. It handles very high-quality audio (like CD quality) and can stream at higher bitrates.
Use it if: You care about sound and have gear that supports it.
LHDC
Savitech’s LHDC is another high-quality codec. It also supports Hi-Res audio and is designed to compete with LDAC, offering lower latency in some implementations.
Use it if: You want Hi-Res audio with reduced latency and your device supports it.
Edifier Products with Codec Support
- Edifier R1700BTs Active Bookshelf Speakers: aptX, aptX HD
- Edifier W800BT SE Wireless Over-Ear Headphones: SBC/AAC - Bluetooth cannot work without SBC
- Edifier W830NB Wireless Over-Ear Headphones: AAC/SBC, LDAC
- Edifier WH950NB Gen 2 Over-Ear Headphones: LDAC, AAC, SBC
Optimizing Bluetooth Audio Experience
• Use matching codecs: Ensure your phone and headphones share support for the same codec.
• Update firmware: Some devices add codec support via software updates.
• Stay close: Bluetooth signal degrades with distance or obstacles.
• Choose wisely: If you care about audio quality, prioritize codec support over flashy features.
• Adjust settings: On Android, use developer options to select preferred codecs.
• Control your environment: Avoid walls, interference, and stay close to your device.
Bluetooth codecs aren’t just technical jargon. They’re a key part of how your wireless audio sounds and performs. Whether you're listening to music, watching videos, or gaming, knowing what each codec does can help you choose better gear and get better sound.