But wait, there's even more chips!

Maxim Integrated MAX98721BEWV boosted class amplifier

M7H YP (likely a Bosch Sensortec BMP280) (BMP282 pressure sensor)

Apple 343S00051-A1 (likely an iteration of the 343S00052-A1 found in the iPad Pro 12.9") power management

Apple 343S00089-A1 power management

STMicroelectronics STM32L052T8 32-Bit ARM Cortex-M0+ microcontroller

Cirrus Logic CS42L83A audio codec

Analog Devices ADAU7002 audio converter