Xotic Robotalk 2 Envelope FilterThe Robotalk2 sports two individual envelope filter channels. Each channel isindependently voiced and can be preset for different playing style; slow acoustic like attack,percussive, high speed open close and many more. Blend each channel together for additional tone or use the internal dip switch to customize your sounds appropriately. There's a switchable input pad for accommodating both active and passive signals. True bypass for eliminating any