99Sounds vs Vienna Symphonic Library

99Sounds is an independent sound design label and free sound effects repository launched in 2014 by Tomislav Zlatić. Its collections include cinematic effects, drum samples, field recordings, rain sounds, loops, and other categories. Audio files and plugins are royalty-free for personal and commercial projects, including music, video, game development, podcasts, and sound design, and attribution is not required. The license does not permit selling or redistributing downloaded audio, either separately or as an attachment to work. It also bars use of the sounds in noise, white-noise, sleep-sound, or similar apps. Free instrument plugins are listed in VST, VST3, and AU formats. The maker says its instruments work with VST and AU hosts on 32-bit and 64-bit Windows and macOS, but not macOS Catalina. Drumplayer includes twelve kits, eight slots, stereo and multiple mono outputs, channel volume and pan, and pitch-modulation LFO. Upright Piano includes four sampled notes per octave, six dynamic layers per note, and adjustable envelope, tremolo, filter, and reverb. Sound and plugin downloads cost nothing.

Vienna Symphonic Library has no write-up on Specifiction yet; its figures are above.