Williams digital pianos are available from Guitar Center stores and the Musician’s Friend e-commerce website. The company offers five models, including two verticals, two slabs with optional stand, and one ensemble grand. The sounds on Williams instruments are from the Williams Custom Sound Library, a large collection of high-definition sounds carefully sampled from sought-after acoustic, electric, and vintage keyboards, and unique to Williams digital pianos. Also unique to Williams pianos is the Mod/FX control interface, which enables authentic rotary effects on organs and vibrato on electric pianos. All models come with a free introduction to McCarthy Music educational software.