Skip to main content
Play Video
Sound Radix Sound Radix

Sound Radix SurferEQ 2 Software Download

Q&A SKU #J55281000000000
189.0 $189.00
6-Month Special Financing
Limited time Learn more
More ways to pay:
Loyalty Points Icon
Loyalty Points Icon
Earn 1,512 reward points
($15.12 in credit)
Earn 1,512 reward pts.
($15.12 in credit)
Inventory Msg Check Mark Inventory Msg Exclamation In Checkout Promo Inventory Msg Download Icon
Download After Purchase
  • Flexible Financing
  • Download
Chevron Right Icon

Groundbreaking pitch-tracking equalizer.

SurferEQ 2 is a groundbreaking pitch-tracking equalizer plug-in that tracks a monophonic instrument or vocal, and moves the selected bands with the music. Synthesizer filters can track the pitch to maintain the timbre of the sound throughout the instrument's voices. However, sound equalizers have always been static. While being effective for broad tone-shaping and room resonance correction, standard EQs do a poor job at maintaining the vocal or instrument's timbre as the music changes. SurferEQ tracks the pitch of a monophonic instrument or a vocal source and can adapt its bands' frequencies relative to the music in real time, maintaining the natural harmonic balance of the sound source and making it possible to shape the source's timbre relative to the notes being played.

Relevant to The Music
SurferEQ follows the pitch of a monophonic instrument or vocal in real time, and can adjust any of its bands accordingly, thus "Surfing" the soundwaves.

Surf On
Any of SurferEQ's seven bands can be set to SURF mode to track the pitch of the instrument or vocal source and adjust its frequency relative to the notes being played. Furthermore, SurferEQ's pitch can be controlled via MIDI notes, allowing its EQ bands to be played using a keyboard, thus creating a unique timbre-shaping musical instrument.

Unique Filter Algorithms
SurferEQ's analog-like, asymmetric filters sound natural even when pushed to extremes. In addition to the High-Pass, Low-Pass, Shelf and Bell-shaped filters, there's also a unique, 4-mode Harmonic Filter which enables to control the entire harmonic series of an instrument using just a single band of EQ.

Superior Pitch Detection
One of the biggest challenges in designing a real-time pitch-detection algorithm is avoiding octave errors while keeping the algorithm efficient enough for real-time processing. We've spent over a year researching and meticulously developing an accurate, real-time pitch-detection engine with virtually no octave errors.


  • Original asymmetric, morphing EQ algorithms
  • Innovative Harmonic Filter
  • Side-chain input enabling external pitch detection
  • 3-mode MIDI control, including an innovative EQ Instrument mode
  • 64-bit internal processing

Download SurferEQ 2 today!


Questions & Answers

Do you have questions about this product?

Shop with a Friend
Free Shipping
  • Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded).
  • Orders placed before 3 p.m. ET usually ship the same business day.
Learn More
2-Year Free Warranty on Guitars

Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.

Contact Us for Details
We're Here for You

Our Gear Advisers are available to guide you through your entire shopping experience. Call or Chat for expert advice and to hear the latest deals.

Contact Us
Proactive Advisor Support Chat