ML22120 Automotive-Grade Speech Synthesis LSI ROHM Semiconductor ML22120 Automotive-Grade Speech Synthesis LSI is designed for Vehicle Approach Alert Systems (AVAS) and sounds outside the vehicle. The ML22120 has functions for adjusting playback sounds, such as vehicle proximity alert sounds. An equalizer function is also provided to simplify sound adjustment after installation in the vehicle and for each vehicle. The automotive-grade speech synthesis LSI includes a failure detection function that is provided to detect abnormalities in communication with the main microcontroller or external oscillator, allowing for safe and reliable use.