The high level of integration of tinyAVR® devices enable them to replace fairly complex non-MCU functions and save space. The digital music player pictured here offers a typical example of today’s consumer electronics devices, where man-to-machine and machine-to-machine communication take place. When the headphones are plugged into the player, they are identified by the player using I²C or UART. The player gives control over to the headphone buttons, and an equalizer optimizes the audio output curve for this headphone type. The user can then control the player from the headphone buttons connected to the digital I/O. The earbud may have in-ear capacitive sensors telling the player when to output sound, and when not to, to save the battery. The earbuds may have capacitive buttons enabled by Atmel® QTouch® technology, and the user will control the player by touching and tapping the earbuds. All these functions require an MCU, powerful and small, and with the correct set of high-quality peripherals. A tinyAVR MCU would be a prefect match as it can fit in the smallest possible space without sacrificing performance.