Tilt&Shelf

Tilt&Shelf is an innovative new equalizer plugin that offers a better sounding and much easier to use alternative to graphic, parametric and even shelving equalizers for general shaping of frequency spectral content. Unlike other tilt equalizers, Tilt&Shelf is not based on a Baxandall tone control circuit which only roughly approximates a tilt response, especially at low gain or attenuation. In contrast, Tilt&Shelf was designed specifically to allow straight tilt responses across the entire frequency spectrum at any gain or attenuation.

Variable filter slope
Typical conventional filter slopes are fixed at ±6 or ±12dB/oct. One of Tilt&Shelf’s key features is its variable slope that can be adjusted continuously from ‑12dB/oct to +12dB/oct. This allows changes to the overall frequency spectrum that vary from very subtle to quite substantial. The following screenshot shows a tilt response with a ‑1dB/oct slope across the entire frequency spectrum.

AltonaTiltShelfMinusOne

Bessel filter type
The main characteristic of a Bessel filter is its maximally-flat group delay, resulting in minimal pulse or transient distortion. In addition, ringing and overshoot are virtually absent, resulting in optimal signal transparency. Tilt&Shelf is based on a Bessel filter with all its benefits at any equalizer setting, independent of gain, frequency and slope. To see why this is relevant, see comparisons of Tilt&Shelf and typical graphic, parametric and shelving equalizers.

Minimum-phase
Tilt&Shelf is a minimum-phase equalizer, as opposed to linear-phase, resulting in zero-latency audio signal processing and the absence of any pre-ringing.

64‑Bit processing
64‑Bit audio processing throughout ensures no-compromise audio quality.

Resources
Tilt&Shelf’s cycle resource requirements are similar to those of a 31‑band graphic equalizer.

Intuitive GUI
Instead of adjusting multiple gain, frequency and Q‑factor knobs, Tilt&Shelf’s response is manipulated directly by dragging the yellow handles. Both low/high-shelf gains and frequencies can be adjusted independently in order to create combined tilt and low/high-shelf responses. In pivot mode, low-frequency as well as high-frequency content can be adjusted with a single handle. The following screenshot shows an example. Notice the ‑2.6dB/oct slope.

AltonaTiltShelfPivot

Additional applications
With its continuously‑variable slope, Tilt&Shelf is ideally suited to compensate for the increase in bass or low‑frequency response caused by the microphone proximity effect. Likewise, it can be used to emulate the proximity effect in order to create a sense of depth. Tilt&Shelf can also be used to more accurately emulate (exaggerated) high‑frequency sound absorption in air and other media, again due to its continuously‑variable slope.

Specifications
Gain range: ‑20dB to +20dB
Frequency range: 20Hz to 20kHz
Sampling rates: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 192kHz, 384kHz
Plugin formats: Audio Unit, VST (both 32‑bit and 64‑bit)

Download the demo version and give it a try!