ThenAudio · AVPro Global Brand · Modern Audio for Classic Systems · rappfirm.com
Upgrade the Sound. Not the System.
ThenAudio is a small family of devastatingly clever eARC and HDMI adapters from an engineer who got tired of watching HDMI audio problems go unsolved. Unlock Dolby Atmos, DTS:X, TrueHD, and DTS-HD MA — plus PS5 and Xbox lossless — on the gear your client already owns. No receiver swap. No forced upgrade. No compromise.
eARC
Conversion, Simplified
Atmos
DTS:X · TrueHD · DTS-HD MA
3
Plug-And-Play Tools
PS5
/ Xbox Lossless
The Thesis · Why It Exists
Streaming Evolved. The Install Didn't.
// The Gap
Audio standards keep moving — but the receiver in the rack and the soundbar on the wall don't. The usual fix is "rip it out and re-sell the whole chain." ThenAudio's fix is smarter: plug-and-play processors that extract, re-clock, translate, and route so today's formats land cleanly on the gear that's already there. Activate a home theater for PS5/Xbox lossless without touching the audio system. Add 8K-capable ports to a TV or sound system that never had them.
Dolby AtmosDolby TrueHDDolby MATDTS:XDTS-HD MA
The Line · Three Problems, Solved
Small Boxes. Surgical Fixes.
TASHARCV2
SHARC-V2 · Extract & Re-Clock
Sits between the TV's eARC/ARC port and the audio system, extracting and re-clocking the signal to kill handshake instability. HDMI in; three audio outs simultaneously — Optical, Analog Stereo, and Coaxial. The fix for the ARC drop-out nobody could pin down.
TAGUIDE4
GUIDE-4 · Translate The Handshake
When a source outputs Atmos or DTS:X and the downstream amp only speaks PCM, GUIDE-4 translates the handshake so the older amp plays nice — and plays the format. Keep the receiver, get the codec.
TAZ2PRO
ZONE2-PRO · Lift A Second Zone
Pulls stereo audio off a primary HDMI source and routes it to a second zone without touching the main signal path. Add a zone without re-architecting the rack.
Where It Wins · The Engineer's Brief
Solving The Problems Nobody Else Bothered To.
// Built By Someone Who Got Tired Of It
ThenAudio came from one of the genuinely brilliant engineering minds in the business — someone who watched HDMI audio problems go unsolved for years and decided to fix them one small, perfect box at a time. These aren't filler SKUs. They're the answer to the service call you've been dreading.
Where It Wins
📻
Legacy Receiver Keep-Alive
Client loves the amp, hates that it won't decode the new formats. GUIDE-4 keeps it in service.
🎮
Console Lossless
PS5 / Xbox Series X lossless audio onto the existing system — no chain swap.
🔗
ARC Handshake Fixes
The intermittent eARC drop that has no obvious cause — SHARC-V2 re-clocks it away.
🔊
Second-Zone Audio
Lift stereo to a patio or kitchen without disturbing the main theater path.