If you’re having trouble with sound quality
To get the highest sound quality from your earbuds:
Use a lossless file format, such as AIFF, WAV or FLAC.
Use a lossless streaming service, such as Tidal.
If you’re using Spotify or a similar streaming service, use the high-quality streaming option. Ensure to check the streaming quality options in the platform’s settings.
Check the device is not in Social Mode.
If you’re using MP3 or MP3-like files, use high-bitrate MP3, Ogg or AAC files. Or use minimum 256kbps (and preferably 320kbps) files with modern codecs.
Personalize your earbuds again.
The earbuds uses sensitive microphones to personalize, so movements, outside noises and heavy breathing can affect your hearing profile.