L-331 50 Stops / Three Manuals Sound Technology Allen's Proprietary DSP Technology Quad Suite™ Stoplist Library™ - Optional Stop-by-Stop & Note-by-Note Voicing Advanced MIDI Capabilities Voices Changeable Via CD ROM Air Regulator™ Acoustic Portrait™ - Actual Sampled Acoustics The Allen Keyboard Individually Adjustable and Felted Keys Reed Switch Key Contacts - (or OST™) Ivora Naturals & Wood Sharps - Optional The Allen Stop Action Advanced LED Stop Action Pistons - User Reconfigurable L-331 Stop Lists
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