SURFANS F28 - Channel Balance and Digital Filters

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Audio Track: Automatically adjust playback gain with the music's
audio track. Album: Automatically adjust the playback gain
according to the album of the music.
LR channel balance: Slide the progress bar to adjust the balance of
the left and right channels, and set it according to the
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function is not turned on, only the music files in the album can be
played; after this function is turned on, after playing the music of
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preferences. Four filters are available. (This function can only be
set when there is a headset plugged in)
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Low-pass filter - phase compensation;
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Bedienungsanleitung24