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Mystic Circuits Portal

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Page last updated Aug 11, 2025

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Description

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PORTAL is a wave wrapping harmonic distortion. Similar to a wave folder, PORTAL multiplies the harmonics of a signal going through it. Unlike a wave folder once the input has hit the threshold voltage the output will jump to zero instead of folding back on itself, creating a sharp transition almost like the wave has traveled through a portal. When fed with a triangle or sawtooth this can create an effect similar to oscillator sync, but without the need for a second modulating oscillator. When fed with complex audio sources the results are devastating, turning just about anything that goes through it into mad screams from another dimension.

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Three distinct flavors of distortion available simultaneously:

WRAP performs a modulo operation on the input.

ROUND performs an integer division operation on the input.

SPIKE outputs a small trigger whenever a new wrap is generated.

Four voltage controllable parameters each with a dedicated attenuverter or attenuator:

WRAP controls the harmonic multiplication amount of the wrapping effect, with the maximum wrap range being set by the high/ low switch

BIAS* adds a DC offset to the input signal, allowing a second signal to be mixed in or for the input signal to be clipped.

FEEDBACK sends the output of the wrap effect back into its input causing self oscillation, ultrasound burps, higher wrap amounts and generally chaotic behavior.

TRACK makes the wrapping effect follow the signal better or worse, also allowing the output signal to be completely turned off. ‍

Portal utilizes high quality parts throughout:

-Power supply is reverse power protected with high quality TPS7A series voltage regulators reducing any power noise from other modules.

-Entire audio path uses OPA1654 op amps.

-Internal VCAs are Cool Audio SSM2164

Videos

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SUTURE SOUND

Exploring the wild distortion of Mystic Circuits Portal

SUTURE SOUND

Summoning a PORTAL to hell with Mystic Circuits - demonic distortion! // #JAMUARY2020 DAY 18

DivKid

Mystic Circuits Portal - Wave Wrapping Distortion

Mystic Circuits

Superbooth 2018 - Mystic Circuits Portal 0HP & ANA

DivKid

Help! My Portal Sounds Too Crazy!

Mystic Circuits

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Mystic Circuits Portal.

Features and functionality

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Portal offers intense effects quickly but lacks depth, requiring careful attenuation to avoid harshness.
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Portal, when combined with feedback or overdrive techniques, can achieve power-starved, breaking-up sound characteristics.
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Use cases and applications

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Effective on snares and chords; harmonics from chords highlight Portal’s subtle controls.
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Combining Portal with white noise and audio rate modulation can yield unique results.
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Mystic Circuits Portal is effective in creating clicky, glitchy sounds by using gates/triggers as audio, emulating a power-starved effect.
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Using gates to open a VCA with other sounds like oscillators or noise can enhance Portal's clicky, rhythmic effects.
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Comparisons

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Cold MAC has a similar waveshaper feature but is reportedly more subtle than Portal.
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Portal achieves sounds in the same realm as Landscape Noon due to Eli of Mystic Circuits' involvement with both designs.
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Portal is recommended for capturing Stereo Field-like timbres, although 4ms Noise Swash is suggested as an alternative for similar sounds.
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Mods and upgrades

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An attenuator with a large knob is essential for controlling Portal’s feedback circuits effectively.
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Critic Reviews

Mystic Circuits - Portal - Waveform Magazine

waveformmagazine.com

Mystic Circuits' Portal is a wild ride for sound enthusiasts, brilliantly blending harmonics, distortion, and pseudo wave shaping to create an exhilarating sonic experience. With its intuitive controls and unique outputs, it excels in crafting intricate soundscapes that can border on chaos. However, be warned: in full throttle, it can obliterate the bass frequencies, which might not suit everyone’s taste. While its aggressive nature is thrilling, those seeking subtler tones may feel challenged. Overall, Portal is a must-try for adventurous musicians ready to explore new auditory dimensions, albeit with a potential learning curve in managing its intense sound.

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