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RME Audio

RME Audio RME-HDSPMADI-FX 390-Channel MADI PCI Express Card

390 channels of pristine MADI I/O on a single PCIe card — the backbone for large-format studio and broadcast audio routing.

$1,999.00*
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*Price sourced from Amazon.com. Last updated:Jul 13, 2026.Price and availability are subject to change.

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Overview

The RME HDSP MADI FX is a PCIe audio interface card engineered for environments where massive channel counts and absolute reliability are non-negotiable — think broadcast facilities routing hundreds of channels from studio floors, large-format tracking rooms running multiple stage boxes, or post-production houses handling immersive audio formats. With 194 inputs and 196 outputs at 24-bit resolution up to 192kHz, it delivers 390 total channels through triple MADI ports (two optical, one coaxial), plus AES/EBU, stereo analog monitoring output, and both physical and virtual MIDI. The sonic signature is what RME is known for: transparent, precise, and utterly neutral. SteadyClock technology ensures that jitter from incoming clock sources is attenuated to sub-nanosecond levels before reaching the converters or passing downstream, which means your audio sounds exactly as clean locked to a questionable external source as it does on internal clock.

TotalMix FX is the real operational heart of this card. Running on dedicated DSP hardware rather than your host CPU, it provides a complete routing matrix with per-channel parametric EQ, dynamics, reverb, and delay — all at up to 192kHz with zero added latency. You can build independent headphone mixes, route any MADI input to any output, and reconfigure the entire signal flow without ever opening your DAW. For facilities that need to route between a MADI-equipped console, multiple stage boxes, and a recording workstation simultaneously, the triple MADI connectivity means you can maintain separate connections to each without an external MADI router. The card occupies a single PCIe x1 slot and draws minimal power, but it demands that the rest of your infrastructure speaks MADI — this is not a standalone converter with mic preamps, but rather the digital nerve center that ties a large-format facility together. RME's legendary driver stability and long-term OS support make it an investment that engineering teams trust to remain operational across years of system updates.

Key Features

PCI Express Interface

194 input- / 196 output channels = 390 channels

3 x MADI I/O (2 x optical + 1 x coaxial)

AES/EBU I/O (via breakout cable)

3 x virtual MIDI I/O over MADI

Specifications

Brand
RME Audio
Model
RME-HDSPMADI-FX
Interface
PCI Express (1-lane)
Input Channels
194
Output Channels
196
Total Channels
390
MADI I/O
3 (2 x Optical, 1 x Coaxial)
AES/EBU I/O
Yes (via breakout cable)
Analog Output
Stereo
MIDI I/O
1 x physical (via 5-pin DIN breakout cable), 3 x virtual over MADI
Word Clock I/O
Yes
Bit Depth
24-bit
Max Sample Rate
192 kHz
Effects Engine
TotalMix FX with 192 kHz processing
Clock Technology
SteadyClock
Sync Sources
MADI Coaxial, MADI Optical, AES/EBU, Word Clock, Internal

Pros & Cons

👍 Pros

  • 390 channels of 24-bit audio on a single PCIe card delivers the highest channel density available, eliminating the need for multiple interface cards in large-format studios
  • TotalMix FX runs on dedicated hardware DSP, providing zero-latency monitoring and routing across all channels without taxing the host CPU
  • RME's SteadyClock technology maintains sub-nanosecond jitter performance regardless of external sync source, preserving sonic transparency across the entire channel count
  • Triple MADI I/O (2 optical + 1 coaxial) provides redundancy and flexible connectivity to stage boxes, consoles, and other MADI-equipped devices simultaneously
  • Driver stability across Windows and macOS is among the most reliable in professional audio, with RME maintaining long-term support for legacy and current operating systems

👎 Cons

  • Requires a desktop workstation with a physical PCIe slot, making it incompatible with laptop-based rigs or Thunderbolt-only studio setups
  • The high channel count demands MADI-equipped infrastructure on the other end — stage boxes, consoles, or converters — which represents significant additional investment
  • AES/EBU and MIDI connections require separate breakout cables that are not always included, adding cost and cable management complexity
  • No built-in analog microphone preamps or instrument inputs — this is purely a digital routing engine that requires external conversion for analog sources
  • The sheer routing complexity of 390 channels in TotalMix FX has a steep learning curve, even for experienced engineers

Frequently Asked Questions

At 48kHz, each MADI port carries 64 channels, giving you 192 channels across the three ports (2 optical, 1 coaxial). At 96kHz the channel count per port halves to 32 (96 total MADI channels), and at 192kHz it drops to 16 per port (48 total). The remaining channels come from AES/EBU and the analog stereo output, bringing the full total to 194 in and 196 out at base sample rate.
The HDSP MADI FX requires a single-lane PCI Express slot (x1 or larger). RME's drivers are known for extremely low latency and CPU efficiency, but running 390 channels simultaneously benefits from a modern multi-core processor and sufficient PCIe bandwidth. It is compatible with Windows and macOS, with RME providing long-term driver support for both platforms.
Yes. TotalMix FX is a hardware-assisted DSP mixer running on the card itself, not your CPU. It provides a full routing matrix for all input and output channels with per-channel EQ, dynamics, and effects processing at up to 192kHz. This means you can create independent monitor mixes, route any input to any output, and apply processing without adding latency or CPU load.
The card offers intelligent automatic master/slave clock control. It can lock to incoming word clock, any of the three MADI streams, or AES/EBU as a sync source, and it also generates its own word clock output. RME's SteadyClock technology ensures sub-nanosecond jitter performance regardless of which external source you lock to, keeping all 390 channels sample-accurate.
Yes. The three virtual MIDI I/O ports are transmitted over the MADI stream itself, which means you can send MIDI data — including timecode, DAW control, and machine control — between connected MADI devices without additional MIDI cabling. The physical MIDI I/O via the breakout cable provides a fourth traditional MIDI connection.

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