Pixel Film Studios today introduces AI Clear Audio — an intelligent resonance removal plugin for Final Cut Pro that uses a real-time 8192-point FFT engine running at 93 frames per second of spectral analysis to automatically identify harsh ringing frequencies, metallic tones, and room resonances, then applies up to 12 simultaneous transparent notch filters to suppress them. No manual frequency hunting. No spectrum analyzer open in a separate application. Drop it on a dialogue or narration clip, press Analyze, and the problem frequencies are found and treated automatically.
Resonance is one of the most common and most stubborn audio problems in location recording. A conference room with a glass wall and hard floor that rings at 320 Hz on every "t" and "k" consonant. A lavalier mic packed under a shirt that builds up a harsh metallic peak in the 2 kHz range. An HVAC duct in the ceiling of an interview location that couples acoustically with the room at a specific frequency and colors everything recorded there. These resonances cannot be fixed with a broadband EQ cut — the affected frequency is too narrow, and a broad cut removes too much of the voice along with the problem. They require notch filtering: a very narrow, very deep cut at the exact resonant frequency. The challenge has always been finding that frequency precisely. AI Clear Audio finds it automatically.
The 8192-Point FFT Engine
AI Clear Audio's spectral analysis engine uses an 8192-point Fast Fourier Transform — the mathematical operation that converts a time-domain audio signal into its frequency-domain representation. The 8192-point size produces a frequency resolution of 5.86 Hz per bin, meaning the engine can identify and target resonant peaks with precision narrow enough to treat a ringing tone without audibly affecting adjacent frequencies.
The FFT analysis runs at 93 frames per second — well above the 60fps threshold that ensures no audible resonance event passes through undetected even in fast speech with rapid consonant transients. Every audio frame is analyzed, every spectral peak is evaluated against the threshold criteria, and the notch filter positions update in real time as the signal changes.
Up to 12 active notch filters can operate simultaneously. In practice, most resonance problems involve one to three dominant peaks — but complex acoustic environments, certain microphone resonances, and rooms with multiple reflective surfaces can require more. The 12-filter ceiling handles the most challenging real-world recording situations without limit.
Two Modes: Dynamic and Static
AI Clear Audio operates in two distinct processing modes that address two different types of resonance problems.
Dynamic Mode is live adaptive suppression. The spectral analysis engine continuously monitors the incoming audio and moves the notch filters in real time to track resonances as they appear and shift. This is the correct mode for resonances that vary with the content — a microphone resonance that only appears on certain consonants, a room mode that is excited by specific vocal frequencies, or any situation where the problem frequency changes during the recording. Dynamic Mode follows the resonance wherever it goes.
Static Mode is designed for consistent, fixed resonances. The plugin analyzes a section of audio, identifies the dominant resonant peaks, and locks the notch filters at those positions for the duration of the clip. The filters do not move — they stay fixed at the analyzed frequencies and provide maximum suppression with no risk of the adaptive algorithm over-tracking or treating intentional tonal content. Static Mode is the right choice for dialogue recorded in a room with a single dominant acoustic problem, narration recorded on a microphone with a known resonance peak, and any situation where the problem frequency is stable and predictable.
"Resonance removal used to be one of the most tedious tasks in audio post — open a spectrum analyzer, play the problem section, identify the frequency by ear, manually set a notch filter at exactly the right point, check the Q width, check the depth, compare. Repeat for every problem frequency in every clip. AI Clear Audio does that entire process automatically, in real time, in Final Cut Pro. For editors who aren't audio specialists, it removes a technical barrier that was genuinely getting in the way of clean audio."
— Dave Austin, Founder & CEO, Pixel Film Studios
Precision Controls
Three primary controls give complete command over the detection and suppression behavior:
- Threshold — sets how sensitive the detection engine is to resonant peaks relative to the surrounding spectral content. Lower threshold values cause the engine to treat subtler peaks; higher values restrict treatment to only the most prominent ringing frequencies. The correct threshold setting depends on the recording — noisy environments typically require a higher threshold to avoid treating spectral content that is not actually problematic.
- Max Notch — sets the ceiling on simultaneous active notch filters, from 1 to 12. Restricting the count to a lower number in Static Mode ensures that only the dominant peaks are treated and prevents the engine from addressing minor spectral features that don't audibly affect the recording.
- Reduction — controls the depth of each notch filter in decibels: how strongly each identified resonance is suppressed. Transparent treatment typically requires 6–12 dB of reduction. Severe resonances may require 18–24 dB. The control allows matching the reduction depth precisely to the severity of each problem without over-processing the surrounding audio.
Built for Dialogue, Narration, and Voice
AI Clear Audio is optimized for spoken word content — dialogue recorded on location, narration recorded in untreated rooms, interview audio from conference rooms and offices, voiceover recorded on microphones with known resonance characteristics, and any recording where the quality of the human voice is the primary editorial concern. The spectral analysis is tuned to identify the sharp, narrow resonance peaks that are characteristic of acoustic resonance, not the broad spectral variation that is normal in music or complex sound design content.
Availability and Pricing
AI Clear Audio is available today at pixelfilmstudios.com for $39.95. One-time purchase, no subscription. Requires macOS Ventura 13.0 or later and Final Cut Pro 10.8 or later. Universal binary — native Apple Silicon and Intel. Installs via the PFS Installer app or by manual download from the customer account page.
About Pixel Film Studios
Founded in 2011, Pixel Film Studios is the leading developer of professional visual effects, titles, transitions, and generators built exclusively for Apple Final Cut Pro and Motion. Over the past 14 years, the company has shipped more than 2,000 products and fulfilled millions of orders for video editors, content creators, broadcast designers, and post-production professionals in over 100 countries. Learn more at pixelfilmstudios.com.
Press Contact
Colin Bauer
Director of Communications, Pixel Film Studios
[email protected]