The painting titled "Laudate Dominum" by William Selby is an expressive and vibrant depiction of a musical performance. The composition is dominated by a figure in the foreground, clad in a bright blue garment with white cuffs, likely a singer or a conductor, who appears to be passionately engaged in the performance. The dynamic brushstrokes and the intensity of the colours used in the figure's attire convey a sense of movement and emotion.

In the background, there are additional figures and elements of an orchestra, though they are rendered in a more abstract and less detailed manner. The warm, earthy tones of reds, browns, and oranges in the background contrast with the cooler blue of the central figure, creating a dramatic and vivid scene. The use of light and shadow adds depth and emphasises the focus on the central performer.

The overall style of the painting is loose and impressionistic, with bold and energetic brushwork that captures the fervour and intensity of a live musical performance. The title "Laudate Dominum," which translates to "Praise the Lord," suggests a religious or spiritual theme, further emphasised by the emotional and expressive quality of the artwork.