Led light string driver, led light string and christmas tree with music playing function

A LED light string driver with music playing function, comprising:

• a housing, a control board provided in the housing and a speaker;
• wherein, a power supply terminal of the control board is connected to an external DC power supply, a first output terminal of the control board is connected to a light string body provided externally, a second output terminal of the control board is connected to the speaker;
• a circuit is provided on the control board;
• the circuit includes:
• a master control chip, a LED driving module and a power amplification module electrically connected to the master control chip;
• the master control chip generates a PWM signal and/or a music modulated signal;
• the LED driving module is electrically connected to the light string body provided externally and drives the light string body to light up according to the PWM signal;
• the power amplification module is electrically connected to the speaker and drives the speaker to play music according to the music modulated signal;
• wherein, the master control chip generates the music modulated signal according to music data;
• a music data analysis module is provided in the master control chip, the music data analysis module is configured to obtain an attribute of the music data, then generate a corresponding PWM signal according to the attribute of the music data, so that an effect of a light emitted by the light string body is matched with the attribute of the music data.