Clara D

Uncompromised digital audio with 16 AES/EBU channels


  • 24 Bit / 192 kHz Resolution
  • 4 AES/EBU In- and Outputs (16 Channels)
  • 2 MIDI In- and Outputs ("+" version)
  • Switchable Input SRC with 144 dB Dynamic Range
  • 64 Channel DSP Mixing Desk with EQ
  • Cascadeable (via TDM SyncBus)
  • Compatible with current Thunderbolt PCIe Adapters
  • Wordclock/Superclock Input
  • Wordclock / Superclock Output ("+" version)
  • Ultra Low Jitter
  • Windows Drivers
  • free life-long quality support

The Beast

Analog-Style Mixing

The Beast DSP mixer is integrated into the hardware of every Seraph and Clara sound system. This provides latency-free routing, EQ processing, pre/post aux summing and many other functions for all input signals and also the playback signals from the DAW, just like in an analog mixer.


With its 16 channels, the Clara D is the perfect entry to pure digital signal processing. HD audio quality with 24 Bit and sample resolutions of up to 192 kHz guarantee a pristine sound. High-quality sample rate converters ensure flexible clock management while maintaining a full dynamic range of 144 dB.

Precision Clock

The internal clocking of the Clara sound system has an amazingly low jitter of less than one nanosecond. This is beneficial to the audio quality of the system and that of any connected digital device. Often the clock of the Clara D is many times more precise than the internal clock of the connected device and thus makes the purchase of a separate clock generator unnecessary.

Switchable Samplerate Converter (SRC)

The SRCs, which can be switched on via software, allow any digital input signal to be fed into the sound system regardless of samplerate and clock settings. Thus, even without separate synchronization lines, any digital devices may be connected effortlessly.

Realtime Routing, Mixing and EQ

Each input signal of the sound system can be adjusted in volume and routed latency-free to any output. The BEAST DSP mixer also sums up to 64 signals to 8 different busses and plays them back on any number of outputs without delay. Furthermore, the BEAST Mixer adds playback signals from any DAW. All mix sums can be fed back to an application for recording. In each channel of the BEAST mixer there are 4 parametric EQ available for sonic processing.

Sound system with a +

The “+” version includes an extension that adds a word clock output and 2 MIDI inputs and outputs to the sound system. This expansion card is connected to the sound card via a ribbon cable and can therefore be freely positioned in one of the slots of the computer housing.

Expansion options

If several Clara D are installed in one computer, they are synchronized via the TDM SyncBus and appear as a combined sound system to an ASIO application. In the Beast Mixer, up to 32 audio signals can be exchanged with other Clara sound systems and thus also be integrated for the use with ASIO.

Funded by the European Regional Development Fund (ERDF)

Technical specifications

  • PCIe Audio Interface
  • 1 Lane (PCIe 1x) according to PCI Express Base Specification 2.1
  • PCIe Busmaster DMA with Direct ASIO Support
  • Samplerates 22 to 192 kHz
  • Sample Resolutions of 8 to 32 Bit towards the Audio Application
  • Switchable Input SRC with 144 dB(A) Dynamic Range and 1:16 / 16:1 Conversion
  • Beast DSP powered
  • 64 Freely configurable DSP Channels: Input, TDM- and Playsignals
  • TDM SyncBus
  • Multi-Card Support
  • Wordclock / Superclock Input
  • BNC Input: without DC offset, Schmitt-Triggered, Over Voltage Protection
  • BNC Input Frequency Range: 0 to 30 Mhz
  • BNC Input Impedance: 5 kOhm, Software Controlled Termination to 75 Ohms
  • BNC Input Voltage Range: 1,5 Vss to 5,0 Vss
  • Clock Jitter
  • Synchronization Sources: Intern, WordClock/Superclock, AES/EBU; TDM SyncBus

Digital Inputs

  • 4 AES/EBU (8 Channels)
  • Up to 32 Channels via TDM SyncBus
  • BNC WordClock
  • 2x MIDI ("+" version)

Digital Outputs

  • 4 AES/EBU (8 Channels)
  • Up to 32 Channels via TDM SyncBus
  • BNC WordClock ("+" version)
  • 2x MIDI ("+" version)


Windows 10/11

Systems: Windows 10 (32 / 64 Bit), Windows 11, Windows Server

Interfaces: ASIO 2.2, DirectSound, MME, WDM Kernel Streaming

Version 4.42

Size: 13.147 kB

Windows 7 - 8.1

Systems: Windows 7 (32 / 64 Bit), Windows 8 (32 / 64 Bit), Windows Server

Interfaces: ASIO 2.2, DirectSound, MME, WDM Kernel Streaming

Version 4.38

Size: 9.732 kB

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