SplineEQ is a linear phase equalizer plugin crafted for simplicity and flexibility, enabling users to sculpt sound with precision. It employs Bézier splines to create custom filter curves, allowing limitless shaping possibilities without preset filter types. This approach ensures that the frequency profile matches the desired curve, offering a clear and intuitive visual interface that reflects changes in real time. The plugin supports up to 60 bands, with easy creation and adjustment through direct interaction with the interface or host automation.

Designed to maintain sound integrity, SplineEQ utilizes linear phase processing, which preserves the phase of audio signals while adjusting frequency intensity. This results in superior sound quality free from aliasing artifacts common in minimum phase equalizers. The plugin includes a unique frequency analyzer that visually represents frequency intensity before and after filtering, helping users make informed adjustments that align with human auditory perception. Smooth graphics and responsive controls enhance the user experience, making parameter changes seamless and artifact-free.

SplineEQ offers an extensive gain range from infinite attenuation to +60 dB, allowing users to silence or dramatically boost frequency bands. Additional features include curve-wide modification options such as transposition and gain scaling, adjustable resolution and latency settings for optimized CPU usage, and built-in limiting to manage extreme boosts. Compatible across all major sampling rates and available for Windows and Mac in VST and AU formats, SplineEQ supports high-precision 64-bit floating point processing in stereo. Presets can be saved and shared across platforms, supporting creative workflow flexibility.