How to get going, answers to the usual questions, and a real address when you would rather just ask.
Write to the address below from whatever mail app you already use. We answer every message.
ondoq@avivoq.com
Ondoq runs on Android 14 and newer. Install it from Google Play; updates arrive through the store like any other app.
Allow access to your music, then tap Scan Music folder, or Choose folder if your music lives somewhere else. Later scans only look at what changed.
Library, then the ⋮ menu, then Add network share (SMB) or Add WebDAV server. Pick the computer by name, sign in, browse to your music and add the folder.
Connect your USB DAC and tap Allow when Android asks. Ondoq takes over the DAC and the status line under the track tells you whether playback is bit-perfect.
Android does not treat .dsf, .dff, .ape or .wv files as audio, so the plain "music and audio" permission hides them. Use Choose folder (or Library ⋮ → Pick Folder to Scan) and select the folder that holds them: that gives Ondoq access to every file inside it.
Check that the phone is on the same network as the computer, and that file sharing is turned on there. On Windows, sign in with the computer's user name and password; for a Microsoft account, that is the account's e-mail address and password. On a NAS, make sure SMB file sharing is enabled.
The network is slower than the track needs, which happens most with DSD and 24-bit / 192 kHz files over weak Wi-Fi. Ondoq pauses once to fill its buffer instead of stuttering. Move closer to the router, use 5 GHz Wi-Fi, or download the album for that listen.
Away from home your phone can't reach the computer the music is on. Download the albums or tracks you want before you leave: they play without the network, and Android Auto lists them under Playlists → Downloaded.
Tap Allow when Android asks about the USB device; after reinstalling Ondoq, Android asks again. Some phones need a USB OTG adapter rather than a plain USB-C cable. Battery-powered DACs sometimes need switching off and on after a stall. If it still misbehaves, send us a diagnostic log and the DAC's model.
It also says why. The usual reasons: Bluetooth (it always re-encodes), the equalizer or ReplayGain changing the level, the DAC's volume set below maximum from the phone, or upsampling. Turn off what it names and it goes back to bit-perfect.
Make sure the phone is signed in to Google Play with the account you bought it with, then open Settings in Ondoq: the purchase is checked again whenever Google Play is reachable. Reinstalling keeps it, on the same account.
Everything Ondoq keeps is on your phone. Uninstall the app, or clear its storage in Android settings, and it is gone. Downloads can be removed alone in Settings → Downloaded music. See the privacy policy.