MayFly Audio releases the Terrain Deluxe Harmonic Optical Tremolo

MayFly Audio releases the Terrain Deluxe Harmonic Optical Tremolo for players of all fine electronic instruments including Guitarists, Bass Players, and Keyboardists.

Ottawa, Ontario – September, 2025 – The Terrain Deluxe is a Harmonic Tremolo with Tap Tempo, featuring a high fidelity all analog signal path using Light Dependent Resistors (LDRs) for modulation.

The Harmonic Tremolo mode uses an electronic crossover to split the signal into high and low frequency components. These are modulated 180 degrees out of phase and then re-combined creating a wet, lush tone. Speaking of tone, the Tone control pans between the high and low frequency signals, going from full treble to full bass and everything in between. In the unlikely event that you get tired of the beautiful Harmonic Tremolo there is a Normal / Harmonic mode switch. In Normal Mode the high and low components are modulated together creating a traditional tremolo sound.

There are Speed, Depth, and Gain controls, and a Waveform switch to select between square, sine, and triangle waveforms.

The Tap Tempo footswitch works win conjunction with the Tempo Multiplier switch allowing you to create quarter note, eight note, and eight note triplet modulations by just tapping the base tempo. The two tempo LEDs above the footswitch flash together in for Normal mode and 180 degrees out of phase in Harmonic mode.

Finally, there are two independent expression pedal inputs: one each for Speed and Depth.

See the Introduction Video: https://youtu.be/airZVzBP_Go
See the Demonstration Video: https://youtu.be/3Ca9hlBf5SE

• Harmonic Tremolo with Tap Tempo.
• High fidelity all-analog signal path using LDRs.
• Speed, Depth, and Gain controls.
• Tone control that sweeps between high and low frequency signals (center is flat).
• Normal / Harmonic mode switch.
• Sine, Square, and Triangle waveform switch.
• Tap Tempo footswitch with Tempo Multiplier switch.
• Independent expression pedal inputs for Speed and Depth controls.
• Full bypass with Fail Safe® using relays.
• 9VDC, 80mA.

Artwork by Sabine Elliott
MAP price: $220 USD ($299 CAD)

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