When using the AUDIO IN port, sometimes there is no sound.
When you turn off the portable speaker and turn it on again, if the input level is low, it may produce no sound. In such a case, turn up the playback device’s volume slowly.
A threshold value is set to prevent the portable speaker from producing a loud sound abruptly.
When turned on for the first time, or after turned off, the portable speaker does not work unless a certain level of audio is input.
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