The phrase in question describes digital audio workstations and virtual instruments offering sound design and music creation capabilities without cost to the user. These tools emulate the functionality of hardware synthesizers, providing a wide range of sonic textures and modulation options accessible through a computer interface. A prime example would be a software package allowing users to create electronic music by manipulating virtual oscillators, filters, and effects processors, all freely available for download and use.
The availability of these digital tools provides significant advantages to aspiring musicians and sound designers. They democratize access to professional-grade audio creation, removing financial barriers that might otherwise limit participation. Historically, synthesizer technology was exclusive to well-funded studios; however, the proliferation of no-cost options has enabled widespread experimentation and innovation, contributing to the evolution of electronic music genres and the development of new sound design techniques.