Mad Professor Mellow Yellow Tremolo vs SolidGoldFX Aurras
The Mad Professor Mellow Yellow Tremolo and the SolidGoldFX Aurras are both pedals sharing smooth. The SolidGoldFX Aurras leans modulated and ambient. Current prices: $169 vs $209.
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Blended from circuit-archetype lineage, dynamic feel, tone-signal overlap and tone-vector distance — the tone vector itself is derived from editorial description text, not a measured acoustic signal, so this reflects how similarly the catalog copy describes the two, not a lab measurement. Shown only within a gear class, and only where there's enough evidence to be meaningful.39% — somewhat different
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Derived from overlapping tonal signals across both listings.- smooth
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Citation/mention fame — how often this gear is cited across artist rigs and gear discussion.$169via Reverb
$209via Reverb
The Mad Professor Mellow Yellow Tremolo is an optical tremolo pedal from Finnish boutique manufacturer Mad Professor, delivering smooth, musical optical tremolo with Rate and Depth controls in Mad Professor boutique construction. The Mellow Yellow provides natural, organic optical tremolo for vintage rock, country, and classic guitar at Mad Professor Finnish boutique quality.
The SolidGoldFX Aurras is an optical vibraphase modulation pedal from SolidGoldFX (Canada), using photocell optical modulation to deliver smooth, warm phase shifting and vibrato effects. The Aurras combines optical tremolo-style modulation with phasing for a unique, organic modulation character that avoids the mechanical quality of LFO-based phasers. SolidGoldFX is a boutique Canadian effects company known for exceptional modulation pedals.
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Genres this gear is documented as being used in.- Rock
- Country
- Ambient
- modulated
- ambient