TB DualVCF1.9.8 - App Store

Dual VCF - the ultimate dynamic filtering AUv3 plug-in!

Dual VCF adds motion, shape, and colour. It produces evolving rhythmic movement and complex dynamic filter shapes. It contains dozens of analog filter models with that sought-after sound of the 70s, 80s and 90s. Combined with envelope followers and intuitive modulation editors, it provides almost infinite possibilities for creative aural exploration.

Dual VCF features two filter sections, each supporting dozens of low-pass, high-pass and band-pass filter types. Every type is painstakenly modeled after analog filter types found in analog gear, analog synthesizers, and alike, including non-linear filter behavior. Dial in that characterstic 70s, 80s or 90s filter to add some analog flavor to your tracks!

Each filter's cut-off frequency and resonance can be sequenced with an intuitive, free-running or beat-synced modulation editor. Seamlessly switch between sine, triangle, noise, or user-defined modulation waveforms. In addition, these parameters can also be modulated with the built-in envelope follower.

The ToneBoosters DualVCF app captures the microphone (or external sound card) input and processes the signals in real time. To use it as a plug-in, use an AUv3-compatible host app such as Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others. ToneBoosters DualVCF will appear in the list of Audio Unit extensions for effect plug-ins.

How to use DualVCF as AUv3 plugin in a host program, start your favourite AUv3 host app (Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others) and add TB DualVCF as Audio Unit insert effect to a track or output bus. See below on how to use Audio Units in various host apps.

Key features:

- The same professional sound as the acclaimed desktop version
- Two analog filter sections with dozens of filter designs
- Intuitive modulation editor for creative, rhythmic and evolving effects
- Undo/redo, and A/B comparison
- Color themes for the user interface
- Max screen support in Garageband
- Optimised for iPad and compatible with iPhone and iPod Touch
What you should know:
- Licenses acquired for this platform are not compatible with other platforms.
- Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models.

Version History - Stability and efficiency improvements
- New option to customise color themes 1.9.8 May 30 Stability, efficiency, and compatibility improvements 1.9.3 10/05/2025 Efficiency and stability improvements 1.8.8 08/29/2024 - Stability and efficiency improvements
- Significant reduction in memory consumption 1.8.7 06/03/2024 Efficiency and performance improvements 1.8.4 04/29/2024 UI, UX and efficiency improvements
Harmonize version numbers with macOS versions 1.8.0 06/29/2023 App icon improvements
UI improvements
Efficiency improvements 1.7.0 01/14/2023 - Improved UI rendering
- New app icons
- Inproved handling of key commands for copy/paste/undo/redo 1.6.9 01/04/2023 Optimizations for new iPad Mini
Icon refresh 1.6.8 12/08/2021 Fixed an issue with the program manager in certain edge cases 1.6.6 08/16/2021 - Show both filter curves simultaneously if sufficient space available, or use tabs otherwise
- Modulation strength popup window is now triggered by a long tap (touch) or right-mouse click
- stand alone: settings are stored when closing the app and retrieved when re-starting it 1.6.5 08/15/2021 - Improved response with very fast modulation rates
- New dry/wet mix control per filter instance
- Redesigned user interface
- Improved navigation through drop-down menus using mixed use of mouse, keyboard, pen, touch
- New color schemes and various UI improvements
- All-new program manager to save, load and organise programs 1.6.3 07/15/2021 New audio settings panel in stand-alone app to choose sampling rate and buffer size (latency) 1.6.1 03/29/2021 Vastly improved CPU performance
Responsive UI improvements to improve workflow on phones 1.6.0 02/18/2021 Refreshed app icon
CPU optimization 1.5.7 01/07/2021 Stability and efficiency improvements 1.5.6 11/07/2020 - iOS app and iOS AUv3 can now save default settings for new instances
- iOS AUv3 can now export single programs and full program banks
- iOS plugins can now reset to factory programs
- New program manager to load, save, rename, delete, search and categorize user programs that are shared between IAA, stand alone and AUv3 instances
- Improved support for soft bypass if supported by host program 1.5.5 09/23/2020 Improved sound quality / anti-aliasing and oversampling filters 1.5.4 09/09/2020 Improved UI rendering for tiny form factors (e.g. scaled UI in AUM) 1.5.3 08/20/2020 - New limiter enable/disable option
- Beat synced LFO can now go up to a sequence length of 999 beats (> 8 minutes @120bpm)
- Free running LFO can now go up to an LFO rate of 500 Hz 1.5.2 08/19/2020 Vastly improved filters and completely revised on-linear analog filter design! 

With this release we have revamped the non-linear analog filter model significantly, providing more character than ever before. In addition, the two analog-modelled filters can now run in parallel and in sequence for more flexibility. In fact, two sources of non-linear filtering action are now provided:
1) Within-filter non-linear processing to simulate saturating analog filters, and
2) Post-filter non-linear post processing to give the filtered output even more grunge. 1.5.1 08/09/2020 Icon now contains name of app 1.2.4 07/06/2020 Appstore icon refresh 1.2.3 07/05/2020 Various stability and usability improvements 1.2.2 07/03/2020 - Added several new filter types, including unique multi-resonance filters
- New supercharge modes for high resonance filters
- Internal parameters are now updated more frequently for ultra high-accuracy sweeps and modulation
- New control to set pre-limiter output gain with indication of current peak limiter attenuation
- LFO editor curvature can now be modified on iOS using multi-touch gestures
- Filter drive fixed if filter section is disabled
- New color themes
- Various efficiency, usability and stability improvements 1.2.0 06/21/2020