Three delay modes are provided: Single Head, Dual Head and Echo Pong, a ping-pong style repeat. Tone works as a tilt filter that shifts the balance between low and high frequencies. Spread widens the stereo image, Tape Age adds tape-style instability and Drive colours the repeats. Feedback Q shapes the resonance of the repeats.
Tap tempo with a multiplier, three presets and a switchable output boost round out the panel. An expression pedal can control the rate multiplier, the repeat amount or the input level. The mono or stereo input and output routing is set with a matrix switch, and MIDI control is supported on channel 13.
Colortone ZeroSum is a stereo delay pedal that combines several delay heads with three rhythmic variations per mode in one compact enclosure. The pedal is designed and hand-assembled in Sydney, Australia.
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