The "free" part of your search query might be referring to a trial or demo version of Native Instruments Bandstand. Unfortunately, I couldn't find any information on a fully-functional, free version of Bandstand that's available for download. Native Instruments usually offers a trial version or a demo of their products, which can be used to evaluate the software before purchasing.
Native Instruments was a landmark software instrument designed to elevate the General MIDI (GM) format with professional-grade sound quality. While it is no longer sold or officially supported, it remains a nostalgic favorite for composers and educators who work with MIDI files. What was Native Instruments Bandstand? native instruments bandstand pc mac v100015 64 bit free
Includes high-quality reverb, chorus, and mastering tools. The "free" part of your search query might
– No, but UVI’s free player + “Digital Synsations” (free) covers vintage ROM. Includes high-quality reverb, chorus, and mastering tools
Bandstand was based on the format (a standard open sampler format).