ADS1015

The ADS1015 is a 12 bit ADC which is connected via I2C.

ADS1015	ESP32
VDD	3.3
GND	GND
SCL	SCL GPIO22
SDA	SDA GPIO21
ADDR	GND
ALRT	-
A0	Analog Source (e.g. Electic Guitar)

Conclusion

The sampling rate is too low to be usefull.