Check the sleep timer in 调调 separately from a track ending

Choose an observable short timer and check its starting conditions, ending and playback recovery.

1. Select a recognisable playback sample

Prepare an authorised, imported track that plays correctly, and verify its title, duration and audible anchor. Start under ordinary sequential conditions instead of also changing shuffle, servers or another player’s timer. Choose a time when you can observe the ending; it need not be late at night. If you cannot watch the ending now, record the plan and complete it later. Preserve the original track and everyday queue. Do not delete files to force silence or describe your own preparation sample as audio supplied by the app.

2. Identify the installed timer choices

A sleep timer is published, but identical minute presets or an “end of this track” control are not promised across versions. Open the actual timer entry, inspect displayed units, selected state and available cancellation method, then choose a real option convenient for observation. If only presets exist, record one of those rather than claim you successfully entered an arbitrary number of seconds. Keep undisplayed options unknown. This task examines one visible setting in one round; it does not invent fixed button positions for every version.

3. Record start time and expected scope

Record the visible device time, selected timer value, current track and approximate playback position. The expected ending is a plan calculated from the setting, not an already measured stop time. If the interface does not explain whether timing starts at selection or confirmation, leave that detail for observation. Record track length and queue too, because the music may naturally finish before the timer. Silence alone does not identify the timer as its cause. An external clock can establish event order; without precise measurement, report no millisecond-level error.

4. Confirm the timer state and hold conditions

After confirming through the available flow, inspect any enabled state, remaining time or other feedback. If no countdown is shown, record only what can actually be confirmed. Continue the same content without choosing another timer, changing the device clock or starting another app’s audio. If another task interrupts you, record its time and action so an interruption is not confused with a timed stop. Repeatedly opening and closing the timer changes the starting condition rather than proving effectiveness. One clearly recorded setting is a better control than repeated taps.

5. Inspect sound and interface at the ending

Around the expected ending, observe whether sound stops, progress changes and the same track remains displayed. Retain the visible actual stop time beside the setting record. Artwork still on screen does not mean sound continues. Record a natural track ending or empty queue separately instead of merging those with timer completion. If you did not observe the required boundary, report setting completed and ending pending. A paused screenshot alone cannot prove an on-time timer trigger; the result must correspond to a real observation.

6. Treat cancellation or a new setting as another round

If a clear cancellation control exists, save the first round before separately setting a visible timer, cancelling it, and checking both state change and subsequent playback. Without that control, do not claim cancellation. A different timer value also requires a new starting record; the old value cannot explain the new round. When resuming, check volume and output device instead of assuming silence means the timer still controls playback. Pause, mute and output changes are separate conditions. Record them without overwriting the original evidence during diagnosis.

7. Diagnose units and interruption causes

For an early stop, check minutes, selected preset and whether the track or queue ended naturally. For an apparent failure to stop, check that timing was enabled and not cancelled or reset meanwhile. Do not invent the internal timer implementation or change the device clock to force agreement. A longer authorised local track can be a control if other settings remain fixed and the sample change is recorded. Preserve actual feedback and observation scope. Unclear conditions remain unclear; one subjective impression does not establish the same defect on every device.

8. Restore everyday playback and save the record

At the end, cancel an unwanted remaining timer through available controls, or confirm it has ended, and restore normal listening. Save sample, selected value, start evidence, observed ending, possible natural completion and recovery result. Explain timer duration, track length and observation time separately instead of writing only “timer normal.” Re-identify options after version or source changes rather than copy this round’s exact times. Unperformed cancellation, lock-screen or long-wait actions cannot be marked passed. This tutorial claims no completed physical-device certification of a sleep scenario.

Related tutorials and sources

Playback modes, 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: player.