What is the Structured Audio Sample Bank Format (SASBF)?
SASBF is part of the Structured Audio tool in MPEG-4. It provides for powerful wavetable (or sampling) synthesis capabilities. Wavetable synthesis produces very good results when synthesizing timbres of natural instruments. The technique uses a relatively small number of PCM recordings of notes, called “wavetables”, as the basis for synthesizing all the notes required for rendering. In synthesis, the wavetables are pitch shifted, filtered and enveloped. The particular types of pitch shifting, amplitude modulation (envelopes) and dynamic filtering used in SASBF allow shifting over a broad range of pitches.
