You can first check whether the following Bluetooth speaker has been connected correctly, if the connection is wrong, then correct in time;
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There may be a problem with the output audio, check the signal source to see if it has a problem, if it is, then solve it in time, if you try the above methods or not, then you can clean up the speaker dust or check whether the speaker eardrum is split, both of these situations will lead to the Bluetooth speaker abnormal sound, if it appears to clean up in time.