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Soundtheory Gullfoss
What Soundtheory Gullfoss is
Soundtheory Gullfoss is an intelligent equalizer for mixing and mastering. It analyzes audio in real time with Soundtheory’s computational auditory perception model, identifying elements competing for attention and adjusting the signal to improve clarity, detail, spatiality, and balance. It can address balance issues even when the separate tracks are unavailable. The product includes Gullfoss, Gullfoss Live for live mixing and tracking, and Gullfoss Master for mastering. Standard and Master editions have approximately 20 ms latency; Live stays below 2 ms and handles transients differently. Processing supports mono, stereo, and M/S-compatible stereo at sample rates from 16 kHz to 384 kHz. The plug-in runs on macOS 10.9 or later and Windows 7 or later in a 64-bit host supporting AU, VST, VST3, or AAX Native. A Personal license costs $199, paid once and covers all three editions. The fully functional trial lasts 14 days and requires an iLok account and License Manager.
Who it suits
Gullfoss suits amateur musicians, mixing engineers, and mastering engineers working on macOS or Windows hosts with supported plug-in formats. The three editions address general, live, and mastering workflows.
What it does well
- Real-time auditory-model analysis
- Three editions included
- Live latency below 2 ms
- Supports mono, stereo, and M/S
- 16 kHz to 384 kHz rates
What to know first
- No free plan
- 14-day trial requires iLok
- Standard and Master have approximately 20 ms latency
- 64-bit supported host required
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Gullfoss | Personal license · three editions: Gullfoss, Gullfoss Live, Gullfoss Master | $199, paid once |
As soundtheory.com lists them, read 7 Oct 2026. The maker's own page has the final word.
Verdict
Gullfoss provides one equalizer product with editions for general, live, and mastering work. Its host, format, latency, and iLok requirements are important considerations before purchasing the $199 as a one-time license.
Facts from Soundtheory Gullfoss's own pages
- Audio specifications
- It supports mono or stereo processing, M/S-compatible stereo, and sample rates from 16 kHz to 384 kHz. · soundtheory.com, 7 Oct 2026
- Auditory model
- Its real-time analysis uses Soundtheory’s computational auditory perception model to identify audible elements competing for attention. · soundtheory.com, 7 Oct 2026
- Company
- Soundtheory says it emerged in 2016 after nearly 14 years of research; its listed address is in Summertown, Oxford, United Kingdom. · soundtheory.com, 7 Oct 2026
- Editions
- The product includes Gullfoss, Gullfoss Live for live mixing and tracking, and Gullfoss Master tuned for mastering. · soundtheory.com, 7 Oct 2026
- Founded
- 2016 · soundtheory.com, 28 Sept 2026
- Headquarters
- 5 South Parade, Summertown, Oxford OX2 7JL, United Kingdom · soundtheory.com, 28 Sept 2026
- Latency
- The standard and Master editions have approximately 20 ms latency; Live has latency below 2 ms and handles transients differently. · soundtheory.com, 7 Oct 2026
- License activations
- Soundtheory says an iLok license provides two activations, using dongle, machine, or cloud activation. · soundtheory.com, 7 Oct 2026
- License duration
- Licenses purchased from June 16, 2024 are limited to 25 years; licenses purchased before that date are perpetual. · soundtheory.com, 7 Oct 2026
- Mix balancing
- Gullfoss can address balance issues between sound elements even when the individual tracks are unavailable. · soundtheory.com, 7 Oct 2026
- Privacy
- Soundtheory’s privacy notice says it may collect identity, contact, financial, transaction, technical, profile, usage, and marketing data, and says it does not collect special categories of personal data. · soundtheory.com, 7 Oct 2026
- Purpose
- Gullfoss is an intelligent equalizer that analyzes audio and adjusts it to improve clarity, detail, spatiality, and balance. · soundtheory.com, 7 Oct 2026
- Supported systems
- The plug-in supports macOS 10.9 or later and Windows 7 or later, and requires a 64-bit host supporting AU, VST, VST3, or AAX Native. · soundtheory.com, 7 Oct 2026
- Trial
- The fully functional trial lasts two weeks and requires an iLok account and iLok License Manager. · soundtheory.com, 7 Oct 2026
- Use cases
- Soundtheory describes Gullfoss as suitable for amateur musicians through professional mastering engineers, and for mixing and mastering applications. · soundtheory.com, 7 Oct 2026
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