When playing for the second time to the end, it cannot be stopped and emits a harsh noise.

[goodgame365]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

I found a serious bug. When playing from the beginning to the end for the first time, and then playing from the beginning to the end again, there is a continuous noise that cannot be stopped. I don't know what the problem is.

20231121_141115.mp4

Expected Behavior

I believe this is a bug and it can be reproduced. I hope it can be resolved!

Steps To Reproduce

t2.zip

Link to jsFiddle, CodePen, Project

No response

Found in Version

1.3-alpha

Platform

Web javascript

Environment

anywhere

Anything else?

No response

[Danielku15]

The problem is caused only when alphaTab uses the "ScriptProcessorNode" instead of the "AudioWorklets". AudioWorklets are not available if:

1. AlphaTab is bundled with WebPack (webpack has only very limited audio worklet support, not compatible with alphaTab)
2. AlphaTab is used in a non-secure context
3. The browser really doesn't support AudioWorklets

On alphaTab.net rule 1. applies.

And the root cause seem to be an inconsistency in the time calculation. For this file (only on the second round) the "tick position" indicates that the player has not yet finished, but the "time position" marks the file as finished.

There must be somewhere an inconsistency in the reporting of played samples. Maybe some samples from the previous playback are still in the buffer and played additionally leading to a wrong calculation on the positions.

[Danielku15]

Update: I could now reproduce it also on the AudioWorklets.

[goodgame365]

Update: I could now reproduce it also on the AudioWorklets.

I found a temporary solution, which is to add a stop() method when he plays to the end and there is no set to replay, forcing it to return to its initial state.

\playground\control.js

at.playerPositionChanged.on(function (args) {
... ....

    //Add new code here.
    if (!at.isLooping && args.currentTime === 0 && args.endTime > 0) {

        at.stop();
    }
});