Prepare offline listening in 调调: visible, imported and playable are different states

Compare one imported track online, offline and after restoring connectivity.

1. Choose a completed local import

This task covers music already imported onto the current device. Choose one owned short track from local music in 调调 and record original location, title, artist, duration and opening anchor. If it appears only in a server list or file picker, complete importing first instead of applying an offline conclusion to it. Preserve the source file and do not experiment with a whole private collection. The target is this copy on this device: another phone’s saved result does not establish that the current phone has saved it too.

2. Establish online playback first

With the original network connection intact, open the track and compare its sound, progress and visible information with the preparation record. Listen at the opening and a later recognisable passage instead of assuming a few seconds prove the whole track. Observe pause and resume once, recording actual results rather than treating a progress bar as audible evidence. If online playback already fails, resolve the file or output issue before disconnecting. Otherwise an offline failure cannot distinguish a network condition from the pre-existing problem.

3. Define a reversible offline condition

Choose a convenient reversible disconnection on your own device and first record its original connection state. If important communications are expected, defer the test and mark it pending. Disconnection tests whether this track depends on the current network; it does not require deleting accounts, signing out of cloud storage, clearing caches or disabling every system service. Confirm the condition you actually created. One changed icon does not prove that every network is disconnected. If the state remains unclear, explicitly limit the scope of the test.

4. Reopen from the library while offline

Leave the current player, return to local music and select the same track again while offline. Listen at both prepared anchors. This checks reopening better than letting one already playing passage continue, but does not cover every device scenario. Keep track identity, duration and output clear; do not switch to a more heavily cached online track to fit the expected result. Record exact resume behaviour separately. Starting from the beginning is not proof that the file disappeared, and reopening that you did not actually perform is not a pass.

5. Separate audio from remote supporting data

Published offline playback applies to imported music. It does not guarantee that all lyrics, server searches or remote artwork work offline. If audio plays but supporting information is absent, record the two states separately and check whether the file itself supplies that information. Conversely, a retained cover does not prove complete stored audio. Limit the result to this imported item and observed passages, not permanent readiness of the whole library. Local playback needing no 调调 account also does not mean a private server can be accessed without its own credentials.

6. Restore connectivity and verify identity again

Restore the original connection state, return to the same track and confirm it can still be located and played. Restoring connectivity ends the experiment rather than leaving the device in a test condition. Do not backfill remote information that appears now into the earlier offline record. Keep online, offline and restored rounds separate, with their times and file identities. If the device unexpectedly reconnects during testing, mark the interruption and arrange a clearly defined offline observation again. Listening under uncertain connectivity is not valid offline evidence.

7. Diagnose location and failure timing

If the track is absent offline, check whether you selected a server library or a cloud file that was never imported. If it appears but plays only partly, record the stopping point and inspect the original’s completeness. Do not immediately delete the only copy or clear system storage, which would lose the control and change conditions. A smaller known-complete local import can help locate the problem, but does not repair the original track. Retain version, import source and all three rounds; a nonprivate illustration is sufficient for a help request.

8. Deliver a repeatable readiness record

Confirm that connectivity is restored and both original and imported item remain available. Save the three-round comparison of audio and supporting data. State which material was actually heard offline on this device, which was only listed, and which information remains unknown. Before a long journey, check the intended tracks individually rather than extrapolate from one success. Repeat necessary checks after changing devices, reimporting or updating source files. This delivers a repeatable preparation method, not a claim that every track, server and system state was physically tested.

Related tutorials and sources

First import, Background and lockscreen.

Checked on November 15, 2026 against Apple public lookup and the official App Store information and screenshots it lists: version 1.0, requiring iOS / iPadOS 17.6 or later, with identity and version cross-checked against China lookup. Tasks use published capabilities; identify actual controls in your installed version. External records are acceptable. Keep expectations separate from observations; no physical-device, private-server or universal input-environment test is claimed.

Official Apple screenshot: local importing.