 The ASR-10 had a powerful 31 voice synthesis architecture that resembled a synthesizer rather than a sampler.After selecting a sample, the sound could further be modified by up to 3 envelopes (hardwired to pitch, filter, and amplitude), 2 filters in series, one LFO, and 15 modulation sources.Up to 8 layers of different samples could be stacked together to form an 'instrument', and up to 127 different samples available up at any one time.