Technically speaking, Roland never used the term "Soundfont." That is a proprietary format created by E-mu Systems and Creative Technology for Sound Blaster cards. A Soundfont ( .sf2 ) is a container file that holds audio samples and instructions on how to play them back (looping, envelopes, pitch shifts).
Unlike its predecessor, the D-70 featured high-pass, low-pass, and band-pass resonant filters (TVF), which are often meticulously sampled in soundfont libraries to preserve their warmth.
Capturing the unique harmonic grit produced when the hardware pushed its samples to the limit. Pianos and Organs:
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