Known issues and plans

Known limitations in 1.2

• Strict USB output hasn’t been confirmed with a real DAC, and none of the Android 14+ phones we tested offer Android’s bit-perfect path. Where a phone does offer it, strict mode still stops for most files, because Vesqen hands Android floating-point audio and USB bit-perfect formats are integer. It stops and says why instead of claiming something false.
• The first 20 ms of audio are faded in after you start playing, seek or change format. System output keeps this fade-in. On strict USB output it is planned to go away with Vesqen’s own USB output in 2.0.
• In strict USB mode there is a short gap between tracks, even on gapless albums.
• Same-name .lrc files for songs from Android’s media library need an added folder that contains them, and Android 10 or later. On Android 9, only songs in added folders read them.
• A folder that is both in Android’s media library and added with Add music folder shows its songs twice.
• AIFF files that are 8-bit, floating-point, A-law or µ-law don’t play.
• ALAC files don't play on the iQOO 9, because its Qualcomm decoder rejects the setup data Vesqen passes to it. Other phones with this decoder are probably affected. The fix is planned for 2.0.
• Reordering the queue has no on-screen hint yet, and can’t be done with a keyboard alone.
• On Android 9, folders with the same path on the phone and on an SD card are still shown as one folder.
• After Android stops Vesqen in the background, the Play button in the notification shade or on the lock screen can’t restart it on Android 13 and later, and some phones pass headphone buttons only to music apps on their own list. Open Vesqen to continue where you left off.
• On vivo and iQOO phones, turn on Lock screen notifications for Vesqen to see its controls on the lock screen. These phones also pause playback about three minutes after the media volume is turned all the way down.
• Bluetooth is never bit-perfect: the phone re-encodes the audio for Bluetooth.
• Vesqen doesn’t move its data to a new phone.
• Not tested yet: foldables, smoothness at high refresh rates, and TalkBack or phone makers’ screen readers on a real phone.

Planned for 2.0

• Vesqen’s own USB output, so phones without Android’s official bit-perfect path can still play strictly. It’s in development, and we can’t promise it yet.
• Strict USB output that gets each source’s format to the DAC unchanged, including 16-bit sources sent through a 24-bit bit-perfect path.
• Sample-by-sample checks with real DACs and external measuring equipment, to produce the first BIT-PERFECT VERIFIED record.
• Pro features such as strict USB output come with a 7-day free trial and then a one-time purchase. Library, playback and Chain stay free.

Each item has an issue on GitHub with its details and progress. Problems that aren’t listed here can be reported there or by email.