Crossfeed

1. Overview

Crossfeed is a headphone-listening processor designed to make stereo playback feel more speaker-like. It blends a controlled amount of left and right channel information, shapes that blend with filtering and compensation controls, then lets you refine center focus, width, and optional level regulation.

This manual is written for the current desktop standalone Crossfeed product first, then calls out the small ARIA ONE-specific differences where they matter.

The core Crossfeed DSP is the same in both contexts. The main practical differences are:

• Standalone Crossfeed does not offer PRE LIM placement because there is no limiter stage around it.
• Standalone Crossfeed does not show the extra IN / OUT column because master input/output sliders already cover that role.
• ARIA ONE embeds Crossfeed inside the larger advanced workspace and adds navigation, utility pages, and limiter-aware routing options.

At a high level, Crossfeed works like this:

1. The signal enters the Crossfeed engine.
2. A filtered crossfeed path blends controlled information between channels.
3. Tone and image controls shape the result.
4. Wet/Dry blends processed and unprocessed stereo.
5. Optional regulation smooths level behavior.
6. Output trim sets the final level when that column is present.

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2. Accessing Crossfeed

Standalone Crossfeed

In the standalone desktop Crossfeed product, Crossfeed is the main workspace. Open the application and you are already working directly with the dedicated Crossfeed processor.

Crossfeed inside ARIA ONE

In ARIA ONE desktop advanced view:

• Use the Crossfeed navigation card to open the dedicated Crossfeed workspace.
• Use the card's power toggle to enable or disable Crossfeed DSP.
• Use Graphs when you want broader analysis views outside the Crossfeed workspace.

The embedded ARIA ONE layout also keeps system pages in the Bottom Bar:

• MENU opens utility pages such as Account, Settings, Color, Audio Settings, and User Manual.
• Language changes UI language.
• Sync status reflects cloud sync or Local Only status.

Note: The screenshots below show the standalone desktop Crossfeed product first, then Crossfeed embedded in ARIA ONE's advanced desktop layout. The standalone product uses the same core Crossfeed DSP, but does not include the ARIA ONE-specific routing option or extra IN / OUT column discussed later.

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3. Signal Chain Placement

Standalone Crossfeed

In the standalone Crossfeed product, Crossfeed simply runs as the processor you are using. There is no limiter stage around it, so there is no PRE LIM routing choice to make.

Crossfeed inside ARIA ONE

When Crossfeed is embedded in ARIA ONE, the INSERT control chooses where Crossfeed runs in the larger signal chain:

• POST LIM / Post All DSP - Crossfeed runs after the main processing chain, including limiter and safety stages.
• PRE LIM / Pre Limiter - Crossfeed runs before the limiter stages, so image and level changes introduced by Crossfeed are then shaped by the limiter.

Practical guidance:

• Use Post All DSP when you want Crossfeed to behave like a final spatial adjustment.
• Use Pre Limiter when you want the limiter to react to the post-crossfeed stereo blend and level changes.

Current factory Crossfeed presets commonly use Pre Limiter as a practical ARIA ONE default.

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4. Workspace Layout

The current desktop advanced Crossfeed workspace is organized into control columns plus live response graphs.

Standalone column structure

• CROSSFEED - Core blend and tone-shaping controls
• ENHANCEMENT - Imaging and operating-mode controls
• AUTO GAIN - Optional regulation controls
• Response Graphs - Live visualization of the current Crossfeed filters

ARIA ONE-specific layout additions

When Crossfeed is embedded in ARIA ONE, the wider advanced layout can also add:

• IN / OUT - Input and output trim
• ARIA ONE navigation cards, utility tiles, and Bottom Bar utilities around the Crossfeed workspace

CROSSFEED column

This column contains the core processing controls:

• INSERT
• FEEDBACK
• CUTOFF
• BOOST
• FILTER ENABLE
• HIGH SHELF

ENHANCEMENT column

This column contains the image-shaping and operating-mode controls:

• WET/DRY
• MODERN / CLASSIC
• WARP v2 / WARP v1
• FOCUS
• WIDTH
• OS

AUTO GAIN column

This column contains the optional level-regulation controls:

• REGULATE
• PEAK SMOOTHER
• RMS SMOOTHER
• RELEASE

IN / OUT column

This column is ARIA ONE-specific. It does not appear in the standalone Crossfeed product.

On wider embedded ARIA ONE desktop layouts, an additional column can appear:

• INPUT GAIN
• OUTPUT GAIN

If the workspace is narrower, ARIA ONE may prioritize the main Crossfeed columns and graph area instead of always showing this trim column.

Response graphs

The Crossfeed workspace includes three live graph views:

Graph	What It Shows
COMBINED RESPONSE	The broad tonal shape created by the current Crossfeed settings.
HIGH PATH	The high-frequency compensation path.
LOWPASS CROSSFEED	The low-frequency crossfeed path.

These graphs update as you adjust controls such as CUTOFF, FEEDBACK, BOOST, HIGH SHELF, MODERN / CLASSIC, WARP v2 / WARP v1, and OS.

If the panel becomes too narrow, ARIA ONE may hide the response graphs until there is enough room to display them clearly.

Graphs (analyzer views)

The GRAPHS card opens broader analyzer views — FFT, spectrogram, polar level, polar sample, vector, waveform, and metering — separate from the in-workspace response graphs above. It is available both in the standalone product and inside ARIA ONE.

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5. Control Reference

5.1 CROSSFEED Column

INSERT

Chooses where Crossfeed is inserted in the signal chain.

This control is ARIA ONE-only. It is not present in standalone Crossfeed because there is no limiter stage to route around.

• POST LIM - Crossfeed runs after the main processing chain.
• PRE LIM - Crossfeed runs before the limiter stages.

Use this when you want to decide whether Crossfeed happens before or after limiting.

FEEDBACK

Controls the amount of cross-channel bleed.

• Range: 6 dB to 20 dB
• Lower values are subtler.
• Higher values create a more blended stereo image.

CUTOFF

Sets the low-pass corner frequency for the crossfed path.

• Range: 20 Hz to 8000 Hz
• Lower values keep the effect focused lower in the spectrum.
• Higher values let the effect reach further upward into the mids.

BOOST

High-frequency compensation applied in the Crossfeed path.

• Range: 1 dB to 10 dB
• Use it to restore brightness or openness when the crossfed signal feels too dark.

FILTER ENABLE

Enables manual high-frequency filter override.

• Off - Crossfeed uses its automatic high-frequency behavior.
• On - HIGH SHELF becomes active for manual top-end shaping.

HIGH SHELF

Sets the frequency above which high-frequency compensation is applied.

• Range: 20 Hz to 8000 Hz
• Only active when FILTER ENABLE is on

Use this when you want more direct control over how the top end is preserved.

5.2 ENHANCEMENT Column

WET/DRY

Blends the original stereo signal with the processed Crossfeed signal.

• Range: 0% to 100%
• Lower values preserve more of the original stereo image.
• Higher values increase the Crossfeed effect.

MODERN / CLASSIC

Selects the Crossfeed coefficient-design variant.

• MODERN - Uses the newer convenience-oriented coefficient-calculation path.
• CLASSIC - Uses the more direct filter coefficient calculation path.

Both target the same general Crossfeed goal, but they arrive there through different calculation paths. Use this control when you want to compare the current convenience-based implementation against the more direct legacy-style path.

WARP v2 / WARP v1

Switches between corrected warping and legacy warping behavior.

• WARP v2 - Corrected current behavior
• WARP v1 - Legacy reference behavior

WARP v1 did not properly unwarp the coefficients across different sample rates. WARP v2 fixes that behavior, so it should be treated as the standard starting point in current builds.

FOCUS

Adds mid emphasis after Crossfeed mixing.

• Range: 0 dB to 6 dB
• Higher values pull the image toward the center.
• Lower values preserve a softer phantom center.

WIDTH

Scales stereo width after Crossfeed processing.

• Range: 0 dB to 6 dB
• Lower values narrow the image further.
• Higher values reopen width after channel blending.

OS

Selects the internal operating-rate family used by the current Crossfeed implementation.

Current choices:

• OS: OFF
• OS: 176/192
• OS: 352/384

Crossfeed uses an IIR filter topology, and like many IIR designs it generally performs better at higher sample rates. In practice, this control is mainly exposed so advanced users can inspect and choose that operating context directly.

Practical guidance:

• Higher settings increase processing cost.
• Lower settings reduce CPU use.
• The audible differences are usually subtle compared with the main Crossfeed controls, so do not expect a dramatic tonal change from OS alone.

5.3 AUTO GAIN Column

REGULATE

Enables adaptive level regulation inside Crossfeed.

• Helps stabilize level after changes in Crossfeed amount or filter behavior
• Activates the regulation controls below when turned on

Crossfeed's filters are not perfectly flat from input to output under every possible setting. Rather than forcing every combination to match mathematically, REGULATE adds a crest-based regulation stage that tries to keep input and output behavior aligned while following the same general envelope of the sound.

Leave it off when you want the most direct Crossfeed behavior and prefer to manage level manually.

PEAK SMOOTHER

Smoothing applied to the peak detector.

• Range: 0.001 to 1.0
• Higher values reduce rapid gain swings.

Use this to make the regulation stage less jumpy around fast peaks and transients.

RMS SMOOTHER

Smoothing applied to the RMS detector.

• Range: 0.001 to 1.0
• Higher values create steadier loudness tracking.

Use this to steady the more sustained, body-level part of the regulation behavior.

RELEASE

Release time for the regulation stage.

• Range: 0.0 to 1.0
• Shorter values recover faster.
• Longer values sound smoother but react more slowly.

Together, PEAK SMOOTHER, RMS SMOOTHER, and RELEASE act like limiter-style controls for the regulation stage: they shape how quickly it reacts, how steadily it tracks, and how gracefully it lets go.

5.4 IN / OUT Column

On wider embedded desktop layouts, Crossfeed can also show dedicated trim controls:

INPUT GAIN

Input trim into the Crossfeed engine.

• Range: -20 dB to +20 dB
• Use it to prevent clipping or compensate for quiet sources.

OUTPUT GAIN

Output gain after Crossfeed processing.

• Range: -20 dB to +20 dB
• Use it to match processed level against bypass or compensate for level changes when REGULATE is off.

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6. Parameter Interaction Notes

CUTOFF and FEEDBACK

These are the two main Crossfeed tone/amount controls.

• Lower CUTOFF with moderate-to-higher FEEDBACK gives a darker, more bass-focused blend.
• Higher CUTOFF with the same FEEDBACK makes the effect more obvious and reaches further into upper mids.

WET/DRY and WIDTH

These determine how much of the effect you hear and how much width you reintroduce afterward.

• If Crossfeed feels too narrow, reduce WET/DRY first or increase WIDTH.
• If the image still feels too hard-panned, raise WET/DRY before adding more FEEDBACK.

FILTER ENABLE, HIGH SHELF, and BOOST

These controls shape the top end of the crossed signal.

• Use BOOST for broad compensation.
• Enable FILTER ENABLE when you want direct manual control with HIGH SHELF.

REGULATE

Regulation is most useful when:

• you are comparing multiple Crossfeed settings and want steadier output level
• you are using higher operating-rate settings
• you are moving between presets with noticeably different loudness

Think of it as a practical correction stage rather than a tone control. It is there to help keep in = out behavior consistent when the filter topology itself does not stay perfectly flat under every setting.

INSERT and limiter interaction

If Crossfeed changes how the limiter behaves, try switching INSERT between POST LIM and PRE LIM and listen again.

This advice only applies inside ARIA ONE. In standalone Crossfeed, there is no limiter-routing choice to make.

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7. Presets

Crossfeed has its own dedicated preset category in the shared preset library.

Current factory Crossfeed presets include:

• Natural
• Moyish
• Default-Old

Use presets as starting points, then fine-tune:

• Natural for a balanced starting point
• Moyish for a stronger Crossfeed reference
• Default-Old as an alternate factory reference

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8. Suggested Workflow

Quick Start

1. Enable Crossfeed.
2. Start with the Natural preset.
3. Adjust CUTOFF and FEEDBACK first.
4. Use WET/DRY to decide how present the effect should be.
5. Use FOCUS and WIDTH to restore the image balance you want.
6. Add BOOST or enable FILTER ENABLE if the result needs top-end compensation.
7. Turn on REGULATE only if you want internal level stabilization.

Common adjustment patterns

• If the mix feels too hard-panned: raise WET/DRY, then adjust FEEDBACK.
• If the result feels too dark: raise BOOST, or enable FILTER ENABLE and adjust HIGH SHELF.
• If the image collapses too much: lower WET/DRY or raise WIDTH.
• If the center feels too vague: raise FOCUS.
• If the limiter reacts differently than expected: try switching INSERT.

Practical guidance

• Use the live graphs to understand what your settings are doing, but make final decisions by listening.
• Keep REGULATE off while learning the processor, then turn it on later if you want steadier level behavior.
• If the workspace becomes crowded, prioritize the main Crossfeed columns first; graph visibility can depend on available width.

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