The phrase refers to the act of acquiring sound libraries, designed for use within a mobile digital audio workstation, without incurring any cost. These packages typically contain collections of synthesized sounds, samples, and preset configurations tailored for specific musical genres or instrument types. A user might, for example, seek out percussion packs, orchestral libraries, or collections of sounds emulating vintage synthesizers.
Accessing these resources can significantly expand the sonic palette available to music creators utilizing mobile devices. The availability of such resources democratizes music production, enabling individuals with limited budgets to achieve professional-sounding results. Historically, the acquisition of high-quality instrument sounds often involved considerable expense, but the proliferation of freely available packs has lowered the barrier to entry for aspiring musicians.