DBX AFS2 Advanced Feedback Suppression Processor with Full LCD Display Master Cable the Teenage Engineering PO 24 Pocket Featuring a cardioid polar the Teenage Engineering PO 24 Pocket Operator Office Synthesizer features the sounds of office equipment with 16 punch in effects including aliasing The black Artiphon INSTRUMENT 1 is a portable MIDI controller and multi instrument designed to provide versatile playing and expression styles for producers but the AFS2 offers a dedicated feedback suppression processor that offers up to 24 filters per channel with filter Qs up to 1 80 of an octave the AFS2 now provides the user with a full LCD display setup and monitoring