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Detailed Function Explanation of KT1025A Bluetooth Audio Chip for Song Title, Lyrics and ID3 Display

Mr. Xu August 20, 2025

First, all the Bluetooth audio chips, such as KT1025A, support obtaining information such as song titles and lyrics from applications on devices like mobile phones, computers, iPads, etc. (such as platforms like Kugou, NetEase Cloud Music, QQ Music, etc.).

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Information Category Definitions

profile define type:


  • 1 - title (Song title)

  • 2 - artist name (Artist's name)

  • 3 - album names (Album name)

  • 4 - track number (Track number)

  • 5 - total number of tracks (Total number of tracks)

  • 6 - genre (Music genre)

  • 7 - playing time (Playing time)


define:


  • 0x10 - total time (Total duration)

  • 0x11 current play position (Current playing position)


Most chip platforms are roughly like this. For more details, you can search online:

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Pay attention to this information, during Bluetooth music playback, this information is continuously called back.

Here, KT1025A mainly returns two pieces of information, namely "0x01 - - - Song information" and "0x02 - - - Artist's name", and filters out other information.

Among them,

"NF + XXXX" represents lyrics information, which can be directly filtered if the user does not need to display it;

"NN + XXXX" represents the combined information of the song title and the artist's name.

As shown in the following figure is the information output by the serial port of the English song title and lyrics:

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Display Precautions

For the song title and lyrics information output through the serial port, if the serial port assistant software does not support Chinese, it may not be displayed correctly.

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The serial port assistant needs to be switched to the "utf - 8" format to display Chinese.

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The test results are as above. The final display effect on the screen depends on whether the display part supports the "utf - 8" encoding.

The tested modules are as follows：

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Tags: #KT1025A #BluetoothAudioChip #SongTitleAndLyricsDisplay #ID3Information


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