Chelys - Bit Perfect Player

Chelys is a bit-perfect music player for Android, made for USB DACs.

Plug in your DAC and Chelys sends your music straight to it, bypassing Android's audio mixer. Each file reaches the DAC at its own sample rate and bit depth, untouched. If something changes the signal, like EQ or ReplayGain, Chelys tells you playback is no longer bit-perfect.

Bit-perfect USB audio
• Direct USB output to your DAC, with no Android resampling
• Every track plays at its own sample rate and bit depth
• Volume set on the DAC itself, so playback stays bit-perfect (on DACs with hardware volume)
• Other apps stay silent while Chelys plays
• Playback pauses when you unplug the
• A clear readout shows the format and whether playback is bit-perfect

Hi-res and lossless formats
FLAC, ALAC, WAV, AIFF, APE, WavPack, DSD (DSF and DFF), MP3, AAC, Ogg Vorbis and Opus. CUE sheets play a single album file as separate tracks.

Gapless playback and ReplayGain
• Gapless playback between tracks
• ReplayGain by track or album, applied at the exact track change

Parametric EQ
• Parametric EQ for your headphones
• Import an EQ preset file or build your own

Your music library
• Add your music folders and Chelys reads the tags and artwork
• Browse albums, artists, folders, tracks, playlists and likes
• Import .m3u playlists and drag to reorder
• Likes stay put when you re-tag or move files
• Search tags and file names
• Synced lyrics from LRCLIB

Made to look quiet
• True black theme, or marble light
• Seven accent colors
• DAC volume right in the notification

Works with USB DACs and DAC dongles that use USB Audio Class 1 or 2.