X-FDBK from Waves is an audio restoration tool that automatically detects and notches out the frequencies that cause feedback in monitor and PA systems, and the crack release circulates under the same name.

X-FDBK at a glance

Developer	Waves
Type	Studio Tools / Audio Restoration
Formats	VST2, AU, AAX
Operating systems	Windows 10 or later, macOS
Price on Plugin Boutique (October 2026)	€85.29 (regular €165.41)

What X-FDBK does

X-FDBK identifies the main frequencies that cause feedback and places notch filters on them automatically, so a live show can run without the ring that performers and audiences dislike. The developer describes the aim as clearer, louder sound from monitors and PA systems with the feedback removed. Up to 20 filters are available, and the plugin optimizes the bandwidth of each filter along with the amount of cut applied. Global filter controls compensate for unexpected changes during a set, and a display analyzes the incoming audio and overlays the notch filter responses. The developer says it recovers several dB of extra headroom before feedback occurs.

Queries pair the name with keygen and serial key, and a working serial is the string most often typed alongside the torrent and magnet link results.

Key features

• Automated ring-out. The automated setup needs only one person to ring out the PA system, and the developer says it does so quickly and accurately in a set-it-and-forget-it way.
• Up to 20 notch filters. Up to 20 filters are available to notch feedback frequencies, each with its bandwidth and cut amount optimized automatically.
• Global filter controls. Global controls compensate for unexpected changes in the sound during a performance without retuning each filter by hand.
• Analyzer overlay. The display analyzes the incoming audio and overlays the notch filter responses on the spectrum so the cuts can be read at a glance.
• Headroom recovery. By removing the feedback peaks, the developer says several dB of extra headroom is regained before feedback occurs.

X-FDBK compared with similar plugins

DeNoizzer, from W. A. Production, is also a Studio Tools and Audio Restoration plugin, so it covers the same category of restoration work as X-FDBK.

Plugin	Developer	Type	Formats	Systems	Price
X-FDBK	Waves	Audio Restoration	VST2, AU, AAX	Windows, macOS	€85.29 (regular €165.41)
DeNoizzer	W. A. Production	Audio Restoration			€29.65

Price and availability

X-FDBK was listed on Plugin Boutique in October 2026 at €85.29, reduced from €165.41. Prices change often, so the store page shows the current one.