The SoundFont 2.0 (SF2) format, pioneered by Creative Labs for their Sound Blaster cards, is the PDF of sampled instruments. It wraps raw audio samples (usually 16-bit/44.1kHz) and synthesis parameters (loops, envelopes, LFOs) into a single file.
: Modern SF2 files utilize more samples per octave, reducing the "chipmunk effect" and maintaining the natural timbre across the entire keyboard range. ensoniq+ts10+soundfont+sf2+16+2021