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Speaker Initialization
To initialize the speaker:
- Enable speaker: Output Report 0x14 of value 0x04
- Mute speaker: Output Report 0x19 of value 0x04
- Write 0x01 to register 0x04a20009
- Write 0x08 to register 0x04a20001
- Write 7-byte configuration to registers 0x04a20001 - 0x04a20008
- Write 0x01 to register 04a20008
- Unmute speaker: Output Report 0x19 value 0x00