The invention relates to a novel array or piece of equipment (100) for providing assistance while composing musical compositions at least by means of acoustic reproduction during and/or after composing musical compositions or the like which are played on virtual musical instruments, preferably in a light music ensemble. Said array or piece of equipment comprises a composing computer (100) having at least one processor unit (4), at least one sequencer (5) that is data-flow connected to the latter and at least one sound sample library storage unit (6b) that is data-flow and data-exchange connected to at least said units (4,5). In order to manage the sound samples (61) stored in the above-mentioned storage unit (6b), a bidirectional sound parameter storage unit (6a) is provided, which is bidirectional or multitdirectional data-flow and data-exchange connected at least to the processor unit (4) and to the sequencer (5). Each of the sound samples (61) stored in the sound sample storage unit are assigned to said bidirectional sound parameter storage unit, which contains sound definition parameters enabling access to sound samples (61).