It's algorithms as usual for BTE Audio with the release of the AEQ4 American Console Equalizer Algorithm. This algorithm gives a nod to channel EQ modules found in late 70s American consoles, back when disco was king.

Perhaps you'll find familiarity in the smooth, proportional Q bands, replicating the distinctly musical filters. Using carefully designed topology, BTE Audio digitally recreates the characteristics that are still renowned after 30 years.

Fast Features:

• Extremely High Processing Efficiency.
• Supports sampling frequencies up to 384 kHz.
• Clickless parameter update.
• Proprietary topology which is optimized for low latency, low noise and high dynamic range.
• Supports both 32 bit (single precision) and 64 bit (double precision) floating-point processing.
• Built-in reference-quality upsampling algorithm which can be enabled at sampling frequencies 44.1 kHz and 48 kHz to achieve bell shape symmetry at high frequencies.
• Clearly and concisely implemented in pure C++: portable to any platform that is supported by a C++ compiler.

The AEQ4 algorithm also features a trio of overlapping bands and low and high pass filters. Here's the spec sheet on them:

• High Pass Filter: 12dB per octave slope. Cutoff Frequency is continuously variable from 20 Hz to three kHz.
• Low Pass Filter: 12dB per octave slope. Cutoff Frequency is continuously variable from 200Hz to 20kHz.
• Low Frequency Shelving/Peaking: Selectable filter type: Shelving or Peaking. Center Frequency is continuously variable from 40Hz to 800Hz. The amount of boost or attenuation is continuously variable from -12 dB to 12 dB in Peaking mode and from -16 dB to 16 dB in Shelving mode.
• Mid Frequency Peaking: Center Frequency is continuously variable from 400Hz to 8kHz. The amount of boost or attenuation is continuously variable from -12 dB to 12 dB.
• High Frequency Shelving / Peaking: Selectable filter type: Shelving or Peaking. Center Frequency is continuously variable from 800Hz to 16kHz. The amount of boost or attenuation is continuously variable from -12 dB to 12 dB in Peaking mode and from -16 dB to 16 dB in Shelving mode.