Merging Technologies MADI128V3 – 128-Channel MADI Expansion Card for HAPI MKIII

OVERVIEW

Expand Your HAPI MKIII with High-Capacity MADI Connectivity

The Merging Technologies MADI128V3 is a professional 128-channel MADI expansion card developed exclusively for the HAPI MKIII, providing seamless integration with MADI-based recording, broadcast, live sound and post-production systems. Supporting up to 128 channels of digital input and output at 44.1/48kHz, along with operation up to 384kHz, it delivers exceptional flexibility for demanding networked audio workflows.

Designed for maximum connectivity, the MADI128V3 features two pairs of 75Ω coaxial BNC MADI inputs and outputs together with dual SFP cages, allowing users to install optical fibre or additional coaxial transceivers to suit virtually any installation. Full compliance with the AES10 MADI standard ensures reliable interoperability with a wide range of professional digital audio equipment, while support for Standard and Extended MADI modes maximises compatibility across different systems.

Purpose-built for the HAPI MKIII platform, the MADI128V3 delivers the bandwidth, reliability and flexibility required for modern high-channel-count production environments. Whether you’re integrating broadcast infrastructure, connecting digital consoles, expanding recording systems or building scalable networked audio installations, it provides a powerful MADI solution without compromising the renowned audio performance of the HAPI MKIII.

KEY HIGHLIGHTS

Designed Exclusively for HAPI MKIII

The MADI128V3 has been developed specifically for the HAPI MKIII, providing seamless integration and high-performance MADI expansion for professional recording, broadcast and live production systems.

Up to 128 Channels of MADI I/O

Supports up to 128 channels of digital input and output at 44.1/48kHz, delivering exceptional channel capacity for large-scale audio routing and recording applications.

Flexible Coaxial & Optical Connectivity

Dual coaxial BNC connections and two SFP expansion cages provide the flexibility to use either traditional coaxial MADI or optional optical fibre transceivers for long-distance installations.

High-Resolution Digital Audio

Supports PCM sample rates up to 384kHz with 24-bit resolution, making it suitable for the most demanding professional recording and mastering environments.

Broadcast-Grade MADI Compatibility

Fully compliant with the AES10 MADI standard and supporting both Standard and Extended operating modes, ensuring compatibility with a broad range of professional digital audio equipment.

FEATURES

• 128-channel MADI expansion card designed exclusively for the Merging Technologies HAPI MKIII.
• Supports up to 128 simultaneous digital inputs and outputs at 44.1/48kHz.
• High-resolution operation at sample rates up to 384kHz.
• Professional 24-bit digital audio conversion support.
• Two pairs of 75Ω coaxial BNC MADI inputs and outputs.
• Dual SFP cages support optional optical fibre or additional coaxial MADI transceivers.
• Fully compliant with the AES10 MADI standard for broad system compatibility.
• Supports both Standard (56-channel) and Extended (64-channel) MADI operating modes where applicable.
• Flexible channel counts at higher sample rates for professional recording workflows.
• Ideal for broadcast, post-production, live sound and studio installations.
• Engineered for reliable integration within large-scale networked audio environments.
• Designed and manufactured by Merging Technologies for professional audio applications.

TECHNICAL SPECS

General

Product Type: MADI Expansion Card

Compatibility: Merging Technologies HAPI MKIII

Installation: Internal expansion card (Expansion Slot 1)

Digital Audio Standard: AES10 MADI

Resolution: 24-bit

Maximum Sample Rate: 384kHz

Connectivity

MADI Inputs: 2 × Coaxial BNC pairs (4 BNC connectors)

MADI Outputs: 2 × Coaxial BNC pairs (4 BNC connectors)

Optical Connectivity: 2 × SFP cages (transceivers not included)

Supported SFP Types: Multi-mode fibre, single-mode fibre or compatible coaxial transceivers (optional)

Channel Capacity

44.1 / 48kHz: 128 Inputs / 128 Outputs

88.2 / 96kHz: 64 Inputs / 64 Outputs

176.4 / 192kHz: 32 Inputs / 32 Outputs

DXD / 384kHz: 16 Inputs / 16 Outputs

Supported Modes

Standard MADI (56-channel)

Extended MADI (64-channel)

Legacy Mode

High-Speed Mode (96kHz–192kHz)

Selectable Coaxial or SFP input source

Optional mirrored output across Coaxial and SFP connections

Applications

Professional Recording Studios

Broadcast Facilities

Live Sound Systems

Post-Production

High-Channel-Count Digital Audio Networks

Networked Audio Infrastructure Expansion