EBS BASSIQ Blue Label Envelope Filter PedalThe EBS BassIQ produces sounds ranging from classic auto wah effects to spaced out Funkadelic and synth bass sounds. It is for everyone looking for a fun, fat sounding, and responsive envelope filter that reacts to how you play in a musical way. Q, Threshold & Attack controls The Threshold and Attack control knobs set the sensitivity of how the pedal responds to your playing. The sensitivity is the key to create a great variety of sounds from synth