Stereo Delivery Analyzer · VST3/AU/AAX

Corr Matrix Pro

Software copyright registered

A mix can feel beautifully wide in the control room and suddenly turn thin in mono. Corr Matrix Pro 4.1.0 separates the left/right relationship into 31 bands, showing whether the risk lives in kick and bass, stacked vocals or high-frequency widening. Wideband correlation, PHASE, short-term loudness, true peak and DAW time share one screen. It analyses only and leaves the audio untouched.

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Typical Applications

Common applications

These are typical uses. Confirm product specifications and site conditions for the actual rig.

Application 01

Final check before mastering delivery

Application 02

Short-term loudness and true-peak checks before streaming or video delivery

Application 03

Mono / Bluetooth speaker / phone speaker compatibility checks

Application 04

Checks before delivering location multitrack recordings

Application 05

Phase decisions in post-production mixes, especially kick/bass, doubled vocals and stereo widening

Application 06

Teaching and production training that makes phase and mono compatibility visible

01 · Why

Width that sounds good in stereo may not survive mono.

A spacious sound in the control room is appealing. Corr Matrix Pro 4.1.0 helps answer a different question before export: how much of that width survives on phones, Bluetooth speakers and mono systems?

Wide in stereo, thin in mono

Phase cancellation becomes apparent on mono, Bluetooth and phone speakers. Overall correlation may already be dangerously negative while a conventional level meter tells you little about it.

Loudness can be on target while true peak exceeds the limit

Short-term loudness describes the density of a passage; True Peak watches reconstructed peaks. Together they show whether added loudness has consumed delivery headroom.

Brief phase problems are easy to miss on ordinary meters

Bass cancellation, misaligned midrange overdubs and excessive high-frequency widening may last only a moment. Thirty-one bands provide more direction than one overall correlation meter.

02 · What

See where the risk sits in the spectrum.

Check overall correlation, then inspect 31 bands. Loudness, true peak and DAW time stay alongside them so you can review without switching meters.

31-band correlation matrix

Bands span 15 Hz to 21 kHz, with independent positive/negative correlation and phase behavior to locate risks within the spectrum.

Broadband correlation and PHASE

Pearson correlation measures the left/right relationship after DC removal; PHASE shows cosine similarity of raw sample vectors. Both range from −1 to +1.

LUFS-S and True Peak

Short-term loudness starts appearing after approximately 400 ms, with the window expanding to the standard three seconds. Left/right true peaks and the playback-segment maximum update alongside it.

Left/right true-peak meters

Current-block True Peak is shown side by side for left and right, revealing asymmetric peaks and headroom differences.

DAW time context

Shows the host playback position in real time so you can locate a problem in the session.

Free license and device transfer

Claim free through your website account for one device. Deactivate on the old machine before transferring.

03 · Precision

Fast movement is not a substitute for a reliable reading.

Correlation uses a 400 ms rolling window and reports unavailable readings when energy is insufficient, data is discontinuous, audio is silent or playback stops. An absent number is better than a guess presented as a measurement.

Bands

Logarithmic coverage

15 Hz–21 kHz

Response

0.1 ms

Readings below the noise floor

−60 dB

Three plug-in formats

AU / VST3 / AAX

04 · How

Four steps for your delivery checks.

Place the plug-in on the output bus or at the end of your mastering chain, then follow these four steps.

Step 01

Insert it at the output

Place Corr Matrix Pro 4.1.0 last on the main output bus or after your mastering processor for a final check.

Step 02

Scan the correlation matrix

Play the material and inspect all 31 bars. Orange negative-correlation bands or bands with large fluctuations deserve attention.

Step 03

Return to the mix source

For negative bass correlation, check kick and bass phase. For midrange anomalies, check the alignment of doubled vocals.

Step 04

Verify delivery readings

Check correlation, LUFS-S and True Peak for appropriate headroom, then export and perform a real mono listening test.

05 · Free

Free to claim, with every feature

Individuals, studios, post-production teams and schools can use all features. Sign in to your DADAO account and claim a license key without payment. Each license binds to one device; deactivate on the old machine before moving.

Recommended

Completely free

¥0

Free to claim · perpetual use · all users

For independent mixers, producers, mastering engineers, podcasters and creators, as well as studios, post-production teams and educational institutions.

·All Corr Matrix Pro 4.1.0 features, with no separate lite or paid edition
·Claim a free license key on your account page without paying or contacting support
·Each license binds to one device; use the key panel on the old computer to transfer

06 · Use Cases

Use it at these checkpoints.

Review correlation, loudness, true peak and mono compatibility together before delivery.

Before mastering delivery

Place it last in the mastering chain and check phase, correlation, loudness and peaks before export.

Streaming loudness checks

Check short-term loudness and true peak against the destination's current delivery requirements, alongside actual listening.

Mono compatibility

Phones, Bluetooth speakers and car systems are common listening environments. Check that summing to mono does not leave the mix thin.

Location multitrack recording

After recording with ORTF, X-Y or Decca Tree, use the matrix to inspect correlation across the spectrum.

Stereo widening review

After Haas, mid-side or multiband widening, check each band for compromised mono compatibility.

Teaching and training

Give students repeatable readings to relate listening impressions to phase, correlation, LUFS and true peak.

07 · FAQ

Questions before you start.

Answers about licensing, formats, device transfers and the signal path.

Q.01Does Corr Matrix Pro 4.1.0 change the sound?+

No. It applies no EQ, compression, limiting or other effects. Host audio buffers pass through unchanged.

Q.02Why use 31-band correlation?+

Overall correlation indicates a potential risk; the matrix helps locate it in the lows, mids or highs so you can address the source in the mix.

Q.03Can I use it immediately after downloading? Does it need activation?+

One free activation is required, with no payment. Register or sign in to the DADAO website and claim a Corr Matrix Pro 4.1.0 license key on your account page. Open the key panel at the plug-in's bottom right and paste the key. You can also start with a 14-day trial.

Q.04Which plug-in formats and DAWs are supported?+

The project provides macOS and Windows builds in AU, VST3 and AAX formats. AU is macOS-only.

Q.05What is required for deployment across a company, school or studio?+

Installers can be deployed centrally, but each free license binds to one device. Activate each machine with the key claimed through its corresponding account. Before changing machines, deactivate in the old machine's key panel and then activate with the same key on the new machine.

Q.06Why is Corr Matrix Pro 4.1.0 free?+

Corr Matrix Pro 4.1.0 analyzes without changing audio and needs no processing-based feature tiers. Free licensing lets individuals, studios and teaching environments use the same readings.

08 · Get Started

Add Corr Matrix Pro 4.1.0 to your delivery checks.

Check correlation, short-term loudness and true peak before export, then listen in mono.

Ready

Add Corr Matrix Pro 4.1.0 to your delivery checks.

Check correlation, short-term loudness and true peak before export, then listen in mono.

Completely free · perpetualOne device · self-service transferAU / VST3 / AAX14-day full trial

01 · Overview

02 · Specifications

Technical Specifications

These are the published technical specifications for this model, ready for product selection, installation, and deployment planning.

Type: Audio plug-in · AU / VST3 / AAX
Platform: macOS: AU / VST3 / AAX · Windows x64: VST3 / AAX
Bands: 31 center frequencies · 15 Hz–20.02 kHz · out-of-range bands disabled at lower sample rates
Implementation: Independently implemented correlation analysis · loudness based on the project's ebur128 module
Analysis window: 400 ms rolling window for broadband and per-band correlation · approximately 30 Hz UI refresh
Signal path: Unchanged audio passthrough · analysis only, with no EQ, compression, limiting or effects
Licensing: Free · claim through your website account · all features included
Devices: One device per license · transfer after deactivating the old machine

03 · Downloads

Downloads

Installers
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Corr Matrix Pro

Common applications

Width that sounds good in stereo may not survive mono.

See where the risk sits in the spectrum.

Fast movement is not a substitute for a reliable reading.

Four steps for your delivery checks.

Free to claim, with every feature

Use it at these checkpoints.

Questions before you start.

Add Corr Matrix Pro 4.1.0 to your delivery checks.

Technical Specifications

Downloads

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