SBOS218A is a digital volume controller produced by Texas Instruments. It has two independent audio channels, zero crossing detection, and mute function. This product has a wide gain and attenuation range, low noise and distortion, noise-free level transitions, low interchannel crosstalk, and is suitable for audio amplifiers, mixing consoles, multi-track recorders, broadcasting studio equipment, musical instruments, effect processors, A/V receivers, and car audio systems.