Qudelix 5K User Manual page 23

Bluetooth Codec
SONY LDAC
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Available with Android 8.0 or higher.
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In general, LDAC 606/660kbps or higher provides excellent sound quality comparable to the wired
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interface. If you don't get sufficient sound quality, please set a higher LDAC bit rate in the Android
Developer Options menu.
Some specific Android smartphones may not be able to provide reliable 990kbps streaming. Turning
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off the smartphone display, or using 5GHz WiFi might help the LDAC streamed a little better.
The LDAC 660kbps is the best trade-off for reliable streaming and sound quality. In most cases, you
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would get good enough sound quality with LDAC 660kbps.
Enable SONY DAC
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Bluetooth Menu —> Paired Devices —> Qudelix-5K —> device option -> LDAC
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Setting LDAC Bitrate & Sample Rate
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Enable Android Developer Option
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https://developer.android.com/studio/debug/dev-options?hl=en
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Please refer the link above and enable the developer option menu.
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System Setting —> Developer Option —> LDAC Quality
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