{"product_id":"apu-software-loudness-contour","title":"APU Software Loudness Contour","description":"\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/apu.software\/media\/demo-contour.jpg\" width=\"690\"\u003e\u003c\/p\u003e\n\u003ch1 style=\"text-align: center;\"\u003e \u003c\/h1\u003e\n\u003ch1 style=\"text-align: center;\"\u003eAPU Loudness Contour\u003c\/h1\u003e\n\u003ch4 style=\"text-align: center;\"\u003eReal-time equal-loudness contour shaping\u003c\/h4\u003e\n\u003ch1 style=\"text-align: center;\"\u003e \u003c\/h1\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch1\u003eDescription\u003c\/h1\u003e\n\u003cp\u003eAPU Loudness Contour is a real-time equal-loudness filter that offers precise control over a wide range of perceptual loudness contours, including ISO 226 (2003 \u0026amp; 2023), Fletcher-Munson, K-weighting, A\/C-weighting, ECMA-418, and ITU-R 468.\u003c\/p\u003e\n\u003cp\u003eEach contour is normalized to 0 dB at 1 kHz and includes a dedicated contour weight parameter, allowing you to scale the frequency response in both positive and negative directions. A weight of 0% results in a flat response, while negative weights invert the contour.\u003c\/p\u003e\n\u003cp\u003eFor Phon-dependent contours like ISO 226 and Fletcher-Munson, a reference SPL parameter allows you to select the desired phon level from 20-120 dB SPL. With Adaptive SPL enabled, this reference level automatically adjusts based on the incoming signal’s loudness level, allowing the contour to dynamically respond to program material.\u003c\/p\u003e\n\u003cp\u003eThe plugin supports both linear phase and minimum phase filter types. Built-in makeup gain compensation is provided per contour and reference level, calibrated using pink noise LUFS measurements. When enabled, makeup gain offsets the entire contour response by the corresponding gain amount. Additional output gain is available for manual fine-tuning.\u003c\/p\u003e\n\u003cp\u003eA comprehensive real-time spectrum analyzer is included, featuring configurable FFT sizes, window types, bucket widths, and time averaging. Frequency visualization can be switched between linear, logarithmic, or musical note scales, with auto-zoom and custom dB range options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003eIncludes a 30-day trial. Xchange Market redeem codes are converted to permanent offline license keys. A valid license key is required after the trial period. A paid license may be activated on up to 3 devices.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch1\u003e \u003c\/h1\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003ch1\u003eFeatures\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eAdaptive SPL behavior\u003c\/li\u003e\n\u003cli\u003ePositive or negative contour weighting\u003c\/li\u003e\n\u003cli\u003eLinear-phase and minimum-phase filtering\u003c\/li\u003e\n\u003cli\u003ePink-noise LUFS makeup gain\u003c\/li\u003e\n\u003cli\u003eBuilt-in spectrum analyzer\u003c\/li\u003e\n\u003cli\u003eISO 226:2023 and ISO 226:2003 equal-loudness contours\u003c\/li\u003e\n\u003cli\u003eFletcher-Munson, K, A, C, ECMA-418, and ITU-R 468 contours\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch1\u003e \u003c\/h1\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003ch1\u003eTech Specs\u003c\/h1\u003e\n\u003cdiv\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eMAC\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eOS X 10.14 or higher\u003c\/p\u003e\n\u003cp\u003ePlugins: VST-3, AU, AAX, STAND-ALONE\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eWINDOWS\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eWindows Windows 10 or higher\u003c\/p\u003e\n\u003cp\u003ePlugins: VST-3, AAX, STAND-ALONE\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ciframe width=\"690\" height=\"388\" src=\"https:\/\/www.youtube.com\/embed\/pvonOVHanpM?si=24zp8K_ZfbuAqDIE\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e","brand":"APU Software","offers":[{"title":"Default Title","offer_id":54328811880732,"sku":"loudnesscontour","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/1983\/4140\/files\/demo-contour_1.jpg?v=1784594089","url":"https:\/\/jrrshop-3235.myshopify.com\/products\/apu-software-loudness-contour","provider":"jrrshop","version":"1.0","type":"link"}