Carl Martin Classic Optical Envelope
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Carl Martin got a call from an old guitarist friend who despised using his wah all the time but wanted to maintain some of those effects. Here comes the Classic Optical Envelope—an envelope filter for bass or guitar boasting several cool options. It carries two footswitches—one for fx on/off (buffered) and another to choose between three modes (Low Pass, High Pass, and Band Pass). The Classic Optical Envelope also includes controls for Level, Drive, Q, and Tone.