📐 Calibration File Manager

NexusDeck

The dedicated Audyssey calibration file manager and curve uploader for Denon and Marantz AV receivers. Upload Audyssey .ady calibrations direct to Speaker Preset slots over Wi-Fi. Import A1 Evo Acoustix .oca, REW .mdat, .frd, and PEQ exports into your local library for browsing and comparison. The companion piece to AVR Maestro.

Google Play - Coming Soon App Store - Coming Soon See Features ↓
NexusDeck app icon Launching 2026

NexusDeck is in final testing against real Denon and Marantz chassis. Submission to Google Play and the App Store is in progress; this page will update with store links when the build is approved.

Features

Every Calibration File Format In One App

NexusDeck reads the calibration files your existing tools already produce, lets you browse your library on the phone, and uploads them directly to your receiver - no laptop, no MultEQ Editor required for the upload step.

📥

Import Every Common Format

Native parsers for Audyssey .ady, A1 Evo Acoustix .oca, REW .mdat (MEQX export), .frd response curves, and REW PEQ .txt exports. Files imported once are cached in your local library forever.

.ady .oca .mdat .frd PEQ .txt
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Local Curve Library

Everything you've ever imported, on-device. Rename measurements, group multi-position .mdat siblings, refcount shared file bytes so deletes free disk only when no entries reference them. Local SQLite storage, survives app restarts and updates.

SQLite Refcount Rename
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Compare Curves Side By Side

Overlay frequency response curves from any combination of Audyssey, A1 Evo Acoustix, and REW imports. Log-frequency X-axis, magnitude in dB Y-axis, multi-position averaging, smoothing controls. See exactly what changed between calibrations.

Overlay Log-Freq Smoothing
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Upload Audyssey Direct To Receiver

Send Audyssey .ady files straight to Speaker Preset slot 1 or slot 2 on your Denon / Marantz receiver over Wi-Fi. The chassis verifies the upload; NexusDeck reports back whether it stuck. No cable, no laptop, no MultEQ Editor required for the upload step.

Audyssey Port 1256 SPP1 / SPP2 Byte-Verified
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Slot Backup & Restore

Before any upload, NexusDeck reads back what's currently on the chassis and stores it as a backup entry in your library. One-tap restore returns any slot to a previous calibration. Never lose a working configuration to a botched upload.

Pre-Upload Backup One-Tap Restore
🎚️

Guided Walkthrough

Step through every channel of an imported measurement, see the per-channel response, target curve, applied filter set, and the resulting corrected response. Built for the calibration-obsessed audience that wants to understand what the numbers mean.

Per-Channel Target Curve FilterSet
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Pairs With AVR Maestro

If you have AVR Maestro installed, NexusDeck automatically reads its paired-receiver list via the platform's shared container - no re-pairing, no second IP entry, no duplicate device setup. The two apps work as one ecosystem.

App Group (iOS) Content Provider (Android)
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Multi-Format Sharing

Receive .ady / .oca / .mdat files via iOS Share Sheet, Android intents, or direct file picker. Export a calibration entry back out to share with friends, post on AVS Forum, or back up off-device.

Share Extension File Picker Export
How It Works

From Measurement File To Receiver In Three Steps.

NexusDeck targets the exact place existing tools leave you stuck: you have a calibration file on your laptop, and no easy way to get it onto the receiver without re-running the desktop app. NexusDeck closes that gap.

1

Import Your File

Open an Audyssey .ady from MultEQ Editor, an .oca from A1 Evo Acoustix, an .mdat from REW, or any other supported file. NexusDeck parses it, extracts the response curves, and adds it to your library.

2

Browse And Compare

Open any library entry to see channel-by-channel frequency response. Overlay two or more curves to see what room correction changed. Rename, group, or delete entries as your library grows.

3

Upload Audyssey To The Receiver

For Audyssey .ady files: pick a Speaker Preset slot (1 or 2), confirm, and watch NexusDeck stream the calibration to your Denon or Marantz receiver over Wi-Fi. The chassis verifies the upload; NexusDeck reports back whether it stuck. .oca / .mdat / .frd / .txt imports stay in your library for browsing and comparison; chassis upload of those formats is a future release.

Security & Privacy

Local Only. No Account. No Cloud.

NexusDeck is built around the same privacy-first architecture as AVR Maestro. Your calibration files stay on your device, your receiver stays on your local network, and nothing about your setup is sent to MiyaraHub.

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No Cloud Relay

Calibration uploads happen directly between your phone and your receiver over local Wi-Fi (TCP port 1256). Files never traverse a MiyaraHub server.

👤

No Account Required

No sign-up, no email, no MiyaraHub login. Open the app, drop in your first calibration file, and you're in the library.

📡

Minimal Diagnostics

Firebase Crashlytics for crash reports and diagnostic data only - so we can fix bugs you hit. No usage tracking, no ads, no personalization. Opt-out toggle in Settings.

💾

Library Lives Locally

Your calibration library is a local SQLite database plus on-device file storage. Nothing is synced or uploaded to a MiyaraHub server.

🛡️

User-Initiated Uploads Only

A curve only reaches the receiver when you explicitly tap Upload and confirm the slot. Nothing happens automatically, and the chassis is read back to verify what was actually written.

📶

Network Permission Only

The only system permission NexusDeck requires is network access, used exclusively to reach your receiver on your local Wi-Fi.

FAQ

Frequently Asked Questions

Everything you need to know about NexusDeck.

Is NexusDeck affiliated with Audyssey, Denon, or Marantz? ▼
No. NexusDeck is an independent, third-party application developed by MiyaraHub Technologies LLC. It is not created, endorsed, sponsored, or affiliated with Audyssey Laboratories, Denon, Marantz, Sound United, Masimo Corporation, or any of their subsidiaries. "Audyssey," "MultEQ," "Denon," "Marantz," and "REW" / "Room EQ Wizard" are trademarks of their respective owners. Our use of these names is purely to describe compatibility.
Which receivers can NexusDeck upload to? ▼
NexusDeck uploads to networked Denon and Marantz AV receivers that support the binary calibration upload protocol on TCP port 1256. This covers the Cinema 30 / 40 / 50, AV10, X3800H, X4800H, X6800H, and other Audyssey MultEQ XT32 chassis from the last several years. NexusDeck auto-detects the chassis model and channel layout from the receiver and from the calibration file you're uploading.
What file formats does NexusDeck import? ▼
Audyssey .ady (MultEQ Editor exports), A1 Evo Acoustix .oca, REW .mdat (Room EQ Wizard's MEQX measurement export, multi-position aware), .frd response curves, and REW PEQ .txt exports. Today only .ady files upload to the receiver; .oca / .mdat / .frd / .txt are library-and-comparison-only. Dirac Live filter import and chassis upload are not supported in v1.
Does NexusDeck generate calibration curves on its own? ▼
No - and this is intentional. NexusDeck stores, browses, compares, and uploads calibration files produced by other tools (MultEQ Editor, A1 Evo Acoustix, REW, ratbuddyssey, etc). The actual measurement and curve-generation step happens in those tools; NexusDeck is the manager and the on-device upload pipeline.
Will my existing Speaker Preset be safe? ▼
Yes. Before any upload, NexusDeck reads back what's currently in the target Speaker Preset slot and saves it as a backup entry in your library. One tap restores any slot to a previous calibration. NexusDeck also verifies the upload landed cleanly by re-reading the slot after the transfer completes.
How does NexusDeck pair with my receiver? ▼
If you have AVR Maestro installed and paired with your receivers, NexusDeck reads the paired-device list automatically through the shared cross-app container - no second pairing, no duplicate IP entry. If you don't have AVR Maestro, NexusDeck's pairing flow walks you through entering the receiver's IP directly.
How much does NexusDeck cost? ▼
NexusDeck is a free download. The free tier covers all library imports, browsing, and per-curve visualisation, plus up to 5 lifetime uploads to Speaker Preset slot 1 (SPP1) so you can try the upload pipeline end-to-end on your own receiver before deciding. Unlocking unlimited uploads, SPP2 writes, slot backup and restore, the multi-curve comparison view, the Guided Walkthrough, and the AVR Maestro device-handoff bridge is a one-time $12.99 in-app purchase. No subscription, no recurring billing, no ads. Pricing may change before launch.
Which Android and iOS versions are required? ▼
NexusDeck requires Android 7.0 (API 24) or higher, and iOS 14 or higher. Both platforms ship at launch.

Get Ready For Launch

NexusDeck is in final pre-release testing. The page will update with Google Play and App Store links the moment the build is approved.

Try AVR Maestro While You Wait → Get Launch Notification