SOLVED : One of my modules was defectuous. The other one works well with the sound.

Bonjour Jean-Philippe, excusez moi de vous le demander comme ca, est-ce que vous arriver à faire fonctionner le micro et le haut parleur sur ce module? J'ai suivi le tutoriel “Recording and Playing Audio” à la lettre mais aucun son ne sort de ce module.. J'ai l'impression d'avoir tout essayé. 

Sorry to hear you didn't get any valuable help. I'm stuck just like you (No sound coming from the 2 modules I bought). 

Thanks for your help!

1/ Nothing appears on the serial port print. But if I add a little delay just after :  Serial.Begin(115200); I can see “start REC” on the serial port print. But I still get the same result: the LED lights up for 5 seconds then only a double pop coming out of the speaker

2/ The LED lights up for 5 seconds and then turns off, as it is supposed to.

Thanks for your help!

1/ Nothing appears on the serial port print. But if I add a little delay just after :  Serial.Begin(115200); I can see “start REC” on the serial port print. But I still get the same result: the LED lights up for 5 seconds then only a double pop coming out of the speaker

2/ The LED lights up for 5 seconds and then turns off, as it is supposed to.

I'm talking about the brand new DFRobot ESP32S3 AI Camera module.