adverb: very quietly: used in instructions saying how a piece of music should be played or sung
This plate illustrates how the chromatic chord resolves into four key-notes, in different positions, by one semitonic progression and two notes in common; for example, G B D G, B D G B, D G B D. In a pianissimo and slow passage this resolution has a subtle, soft effect; like a snake in the grass. [Scientific Basis and Build of Music, page 116]