The STM32F4DISCOVERY Discovery kit leverages the capabilities of the STM32F407 high-performance microcontrollers, to allow users to develop audio applications easily. It includes an ST-LINK/V2-A embedded debug tool, one ST-MEMS digital accelerometer, one digital microphone, one audio DAC with integrated class D speaker driver, LEDs, push-buttons, and a USB OTG Micro-AB connector.

Specialized add-on boards can be connected by means of the extension header connectors.

Key features:

STM32F407VGT6 microcontroller featuring 32-bit Arm Cortex-M4 with FPU core, 1-Mbyte Flash memory and 192-Kbyte RAM in an LQFP100 package
USB OTG FS
ST MEMS 3-axis accelerometer
ST-MEMS audio sensor omni-directional digital microphone
Audio DAC with integrated class D speaker driver
User and reset push-buttons
Eight LEDs:

LD1 (red/green) for USB communication
LD2 (red) for 3.3 V power on
Four user LEDs, LD3 (orange), LD4 (green), LD5 (red) and LD6 (blue)
Two USB OTG LEDs, LD7 (green) VBUS and LD8 (red) over-current

Board connectors:

USB with Micro-AB
Stereo headphone output jack
2.54 mm pitch extension header for all LQFP100 I/Os for quick connection to prototyping board and easy probing

Flexible power-supply options: ST-LINK, USB VBUS, or external sources
External application power supply: 3 V and 5 V
Comprehensive free software including a variety of examples, part of STM32CubeF4 MCU Package, or STSW-STM32068 for using legacy standard libraries
On-board ST-LINK/V2-A debugger/programmer with USB re-enumeration capability: mass storage, Virtual COM port, and debug port
Support of a wide choice of Integrated Development Environments (IDEs) including IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE