By Emily ParkerUpdated November 2026
If you want to know what Bluetooth codec am I using, the answer depends on two devices: your phone or computer (the source) and your headphones or speaker (the receiver). Both must support the same codec, and the connection falls back to a basic one if they don’t. This guide shows you how to read the active codec on common devices and how to confirm it.
Why the Codec Matters
A Bluetooth codec is the method used to compress audio before it is sent wirelessly. Codecs differ in bitrate and in how much detail they preserve. The baseline codec, SBC, is required on every Bluetooth audio device, while AAC, aptX, LDAC and LC3 are optional and usually deliver better quality when both ends support them. For a broader comparison, see What's the Best Bluetooth Audio Codec? SBC vs AAC vs aptX vs LDAC.
Shopping for one? See our guide: Jabra Elite 65t Bluetooth Codec Review: What You Should Know.
How to Check Your Active Codec
On Android
- Turn on Developer options. Go to Settings, About phone, and tap Build number seven times.
- Open Settings, then System, then Developer options.
- Scroll to the Bluetooth section and look for “Bluetooth audio codec.” The selected option is the one in use.
Menu names vary by manufacturer. If you can’t find the entry, search Settings for “codec.”
On Windows 11
Windows does not show the codec directly in most builds. Open Settings, then Bluetooth & devices, and check the device’s properties. Many headphones report their codec through their companion app instead. For Windows-specific steps, see Windows 11 Bluetooth Codec: How to Check and Switch to aptX or LDAC.
On iPhone and Mac
Apple does not display the active codec in a settings screen. iOS uses AAC with compatible headphones and SBC otherwise, and it doesn’t let you choose. For model-specific details, read How to Change Bluetooth Codec iPhone: What Apple Lets You Control (2026).
Confirm It With Your Headphones or Speaker
The receiving device often knows more than the phone does. Check the spec sheet from the manufacturer for supported codecs, then open the companion app if one exists, since some apps display the current connection type. Examples include Pixel Buds Pro and Sonos Roam, which list their codec support in documentation. Model guides on this site cover specifics, such as Pixel Buds Pro Bluetooth Codec: What It Supports and How to Check and Sonos Roam Bluetooth Codec: What It Supports and How to Check.
Checklist Before You Start
- Your phone or computer’s model and operating system version
- The exact headphone or speaker model
- The manufacturer’s list of supported codecs for both devices
- Developer options enabled on Android, if you need to view the codec
| Codec | Typical use | Needs support from |
|---|---|---|
| SBC | Universal fallback | All Bluetooth audio devices |
| AAC | Apple devices and many Android headphones | Both source and receiver |
| aptX / aptX HD | Many Android phones and Windows PCs | Both source and receiver |
| LDAC | High-resolution streaming on supported Android phones | Both source and receiver |
Common Mistakes
- Assuming a codec is active because both devices list it. Both must support it, and the device has to negotiate it.
- Expecting high-quality codecs from streaming apps. Apps send audio at their own quality settings, which can limit results.
- Forgetting that the codec resets when you reconnect or switch devices. Check again after each change.
- Judging quality by codec alone. Driver quality and streaming bitrate matter too.
FAQ
Does my phone always use the best codec available?
No. Phones choose from codecs both devices support, and some prefer stability over maximum quality. You may need to select a codec manually on Android.
Is SBC bad?
SBC is the universal baseline. It works well for casual listening, but it has lower bitrate than most newer codecs.
Can I change my codec on every device?
No. Many iPhones and some earbuds don’t allow manual selection, so the codec is set automatically.
Conclusion
To find out what Bluetooth codec am I using, check the developer settings on Android, the properties or companion app on Windows and Mac, and the manufacturer’s specs for your headphones. Once you know the active codec, you can decide whether a different device or setting would improve your sound.
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About Emily Parker
Emily Parker is part of our editorial team and reviews and edits our headphone tech & types guides, checking product details against manufacturer specifications and owner feedback.
