{"product_id":"apu-loudness-leveler","title":"APU Loudness Leveler","description":"\u003cp\u003eAPU Loudness Leveler is a real-time volume leveler\/rider designed to keep audio within your target loudness range in real-time.\u003c\/p\u003e\n\u003cp\u003eSet a target loudness, choose a tolerance, and the leveler continuously applies gain correction to keep dialog, vocals, podcasts, streams, or program material hovering around the level you want.\u003c\/p\u003e\n\u003cp\u003eThe Leveler is designed to be \"set it and forget it\" for real-time loudness control.\u003c\/p\u003e\n\u003cp\u003eConfigurable timing modes cover fast momentary riding, slower short-term correction, and a traditional RMS mode.\u003c\/p\u003e\n\u003cp\u003eGuard modes, sidechain control, predictive low-latency operation, detector EQ, and built-in limiting provide plenty of tools to keep the leveler working smoothly in a wide range of real-world scenarios.\u003c\/p\u003e\n\u003cp\u003eLearnable gain correction helps tighten final average or integrated loudness on representative renders, while secondary target zones let sidechain and low-level behavior move toward a different loudness range when the material calls for it.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTiming Modes\u003c\/h3\u003e\n\u003cp\u003eThe timing mode parameter selects the leveler's detector family and response character, while channel-link decides whether those measurements are computed per-channel or across the full linked signal.\u003c\/p\u003e\n\u003cp\u003eThe following timing modes are available:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTight\u003c\/strong\u003e - Uses a very fast 25ms LUFS window for close, responsive riding of short notes and fast instrumental material. It is the fastest timing mode and works best when you want the leveler to follow compact note-by-note gestures more assertively than Focus.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFocus\u003c\/strong\u003e - Uses a tight 100ms LUFS window for quick gain riding and immediate correction. It is a fast timing mode and tends to work best when you’d like a more assertive, in-your-face character that reacts to every phrase-level variation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePresent\u003c\/strong\u003e - Uses an LUFS-standard 400ms momentary window for smoother general-purpose leveling. This is often the most natural starting point when you want transparent correction without the tighter, more assertive feel of Focus. It's generally a great balance between responsiveness and smoothness for a wide range of material.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDeep\u003c\/strong\u003e - Uses a 3 second short-term LUFS window. This is useful when you want the leveler to follow the broader contour of the material instead of reacting to every small phrase-level variation. It works well when the goal is large-scale consistency rather than fast riding. This longer window duration is naturally resistant to pumping and breathing artifacts, making it a good choice for music and program material that benefits from more transparent long-term correction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTraditional\u003c\/strong\u003e - Uses a 300ms RMS detector. This gives the leveler a more classic dynamics character, closer to conventional level riding behavior than LUFS-based processing. If you want something more “classic” and less explicitly standards-oriented, Traditional mode is the obvious choice.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eChannel Link\u003c\/h3\u003e\n\u003cp\u003eChannel Link decides whether all channels share the same correction or whether each channel is leveled independently. Linked operation preserves the stereo or surround image, while split operation can correct imbalances between channels.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eLeveling Controls\u003c\/h3\u003e\n\u003cp\u003eThe main Leveling tab is built around a target loudness and target tolerance.\u003c\/p\u003e\n\u003cp\u003eOnce the signal drifts outside the allowed zone, the leveler moves it back toward target using the configured response, gain limits, and guard behavior.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTolerance modes let you choose whether the target zone behaves like a dead zone, an LRA-aware scaling region, or an LRA-based adaptive mechanism.\u003c\/li\u003e\n\u003cli\u003eGuard modes keep the leveler from boosting into tails or cutting into transients by holding gain correction outside the percentile threshold(s).\u003cbr\u003eSidechain modes can engage, disengage, or directly drive the leveler from an external signal.\u003c\/li\u003e\n\u003cli\u003eLow-level handling can keep leveling active, bypass it below threshold, or gate low-level material so ambience and noise are not over-amplified.\u003c\/li\u003e\n\u003cli\u003eMax cut \/ max boost bounds keep the correction practical when the source gets too loud or too quiet.\u003c\/li\u003e\n\u003cli\u003eStandard timing modes use real look-ahead, while the low-latency variants use predictive virtual look-ahead to approximate the same behavior without adding delay.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eGain Correction\u003c\/h3\u003e\n\u003cp\u003eGain correction is designed for final-pass precision.\u003c\/p\u003e\n\u003cp\u003eChoose Average or Integrated, run a representative pass with learning enabled, then lock the learned correction for normal playback, export, or delivery.\u003c\/p\u003e\n\u003cp\u003eThe stored correction is a global dB offset added on top of the normal rolling Leveler behavior.\u003c\/p\u003e\n\u003cp\u003eIt does not replace the target, tolerance, timing, guard, or limiter controls; it simply lets the Leveler compensate for a consistent offset once you know how the full program lands.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAverage learns from the mean output loudness over the render.\u003c\/li\u003e\n\u003cli\u003eIntegrated learns from integrated output loudness, making it useful for LUFS delivery workflows.\u003c\/li\u003e\n\u003cli\u003eLearn \/ Lock \/ Reset keeps the workflow quick: learn during a pass, lock the current value, or clear it back to 0.00 dB.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eDual Targets\u003c\/h3\u003e\n\u003cp\u003eDual targets give the Leveler a shared secondary loudness and tolerance zone for cases where one target is not enough.\u003c\/p\u003e\n\u003cp\u003eThe primary target remains the normal operating range, while the secondary target can take over or blend in for sidechain-triggered and low-level behavior.\u003c\/p\u003e\n\u003cp\u003eIn sidechain Engage Trg and Disengage Trg modes, the Leveler switches or blends between the primary and secondary target zones around the sidechain threshold and knee.\u003c\/p\u003e\n\u003cp\u003eIn Low-Level Target mode, quiet material below the low-level threshold can blend toward the secondary zone instead of holding, bypassing, gating, or continuing to chase the primary target.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUse a tighter primary target for foreground material and a looser or lower secondary target for transitions, beds, or externally driven sections.\u003c\/li\u003e\n\u003cli\u003eThe secondary loudness and tolerance controls are shared by the sidechain target modes and Low-Level Target mode.\u003c\/li\u003e\n\u003cli\u003eThe active target zone is shown in the visualization, so you can see which range the Leveler is currently following.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eAlternate Weighting\u003c\/h3\u003e\n\u003cp\u003eFor the LUFS-based timing modes, the leveler also supports alternate weighting curves in addition to standard K-weighting.\u003c\/p\u003e\n\u003cp\u003eThese curves change the detector's frequency response, which changes what the leveler considers important enough to correct.\u003c\/p\u003e\n\u003cp\u003eThis can be useful when you want the loudness tracking to follow perceived harshness, vocal presence, or full-range energy differently from the default LUFS contour.\u003c\/p\u003e\n\u003cp\u003eThe screenshots below are courtesy of the Loudness Contour plug-in, which allows visualization of the frequency response of each contour type.\u003c\/p\u003e\n\u003cp\u003eIn the leveler, these weighting types are implemented as zero-latency IIR filters, so they can be used in real time.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eECMA-418\u003c\/h3\u003e\n\u003cp\u003eECMA-418 is a modern perceptual weighting standard based on contemporary psychoacoustic research.\u003c\/p\u003e\n\u003cp\u003eIn practice, it can make the leveler's corrections line up more closely with what actually sounds louder rather than what simply measures louder on a raw electrical basis.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eITU-R 468\u003c\/h3\u003e\n\u003cp\u003eITU-R 468 emphasizes the upper midrange and presence region, making the detector much more sensitive to harshness, sibilance, and noisy mid-high content.\u003c\/p\u003e\n\u003cp\u003eThat can be useful when you want the leveler to back off more quickly on material that feels aggressive before it simply looks loud on a broad-band meter.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eA-weighting\u003c\/h3\u003e\n\u003cp\u003eA-weighting reduces low-frequency influence and emphasizes the mid-range.\u003c\/p\u003e\n\u003cp\u003eThis can help the leveler stay focused on the part of the spectrum where speech, vocals, and presence often live, rather than being pulled around by sub or low-end buildup.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eC-weighting\u003c\/h3\u003e\n\u003cp\u003eC-weighting is much flatter than A-weighting and keeps more low-frequency energy in play.\u003c\/p\u003e\n\u003cp\u003eIf you want bass and full-range program weight to influence the detector more strongly, C-weighting is the more natural option.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eDetector EQ\u003c\/h3\u003e\n\u003cp\u003eThe leveler includes a detector EQ that shapes the signal used for loudness detection without changing the audible output directly.\u003c\/p\u003e\n\u003cp\u003eUse it to make the leveler pay more attention to sibilance, presence, or transients - or less attention to low-end rumble and proximity buildup.\u003c\/p\u003e\n\u003cp\u003eNote: Detector EQ affects detection only. The audible output is unchanged unless detector EQ monitor is enabled.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLow-pass and high-pass filters with selectable slopes\u003c\/li\u003e\n\u003cli\u003eParametric mid band with bell, shelf, or band-pass shapes\u003c\/li\u003e\n\u003cli\u003eTrim and mix controls for gain and blend\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMonitor modes to audition the detector path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eLimiter\u003c\/h3\u003e\n\u003cp\u003eThe leveler includes a built-in limiter for peak containment after the loudness-tracking stage.\u003c\/p\u003e\n\u003cp\u003eThe limiter scans its look-ahead region for peak or true-peak excursions and adjusts the current gain trajectory to keep the output inside the configured ceiling.\u003c\/p\u003e","brand":"APU","offers":[{"title":"Default Title","offer_id":50104361648351,"sku":"APU-LEV","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/5173\/6636\/files\/Loudness_Leveler_Gui1.jpg?v=1781107682","url":"https:\/\/pluginfox.com\/products\/apu-loudness-leveler","provider":"PluginFox","version":"1.0","type":"link"}