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HomepageRecording HardwareExpansion Cards › Prism Sound ADA-8XR DIO-DSD
Prism Sound ADA-8XR DIO-DSD

The 8C-DSD DSD I/O Module type PREV039/9/1 provides eight channels of 'Direct Stream Digital' input and output for the ADA-8XR.

The DSD interface format carries an over-sampled one-bit representation of the audio signal as delivered on Super Audio CDs (SACDs).

The DSD I/O Module can transact the DSD data in either SDIF 2 (sometimes known as DSD RAW) or SDIF 3 formats, using coaxial cables via a breakout squid, and optionally in the MAC DSD / SuperMAC format using a CAT5E cable.

When combined with the ADA-8XR's Analogue Line Input and Output modules, the DSD I/O Module provides eight channels of analogue-to-DSD and DSD-to-analogue conversion. The Module also allows for PCM to DSD and DSD to PCM conversion where a PCM-type I/O Module is fitted, such as an AES3 I/O Module. In this case, PCM synchronous sample rate conversion can also be performed between the PCM input and output for all eight channels.

When used in conjunction with a dedicated workstation I/O Module, such as a Pro Tools HD I/O Module, the DSD I/O Module allows DSD audio sources and destinations to be connected to the workstation directly.

Whilst the DSD format uses a fixed sample rate of 2.8224MHz the ADA-8XR's DSD I/O Module allows the user to run DSD-connected Paths with any of the ADA-8XR's sample rate and sync options.
Unless otherwise stated, all performance specifications are quoted RMS, A-weighted, bandlimited 20Hz-20kHz, with PCM sampling at 96kHz and wordlength 24 bits, and with DSD line-up normal. Note that quotation of performance using A-weighting filters is not generally the policy of Prism Sound; however, the noise-shaped nature of DSD signals means that A-weighted measurements are more representative of subjective performance than are unweighted measurements.

PCM to DSD Performance
  • Maximum output level : 0dB SACD (Normal) / +3.1dB SACD (Hot)
  • Absolute gain accuracy : +0.05dB
  • THD+N (997Hz, -1dBFS) : -118dB (0.00013%)
  • Dynamic range (997Hz, -60dBFS) : 120dB
  • Frequency response: fs=96kHz : -3dB: 0Hz...43.5kHz
  • Frequency response: fs=88.2kHz : -3dB: 0Hz...40kHz
  • Frequency response: fs=48kHz : -1dB: 0Hz...22kHz
  • Frequency response: fs=44.1kHz : -0.05dB: 0Hz...20kHz
  • Frequency response: fs=32kHz : -0.05dB: 0Hz...14.5kHz

  • Analogue to DSD Performance
  • As the Analogue Line Input Module except for the following:
  • Maximum output level : 0dB SACD (Normal) / +3.1dB SACD (Hot)
  • Absolute gain accuracy : ±0.1dB
  • THD+N (997Hz, -1dBFS) : -103dB (0.0007%)
  • Dynamic range (997Hz, -60dBFS) : 110dB
  • Frequency response : -0.05dB: 10Hz...35kHz
  • -3dB: 3.9Hz...42kHz

  • DSD to PCM Performance
  • Maximum input level : 0dB SACD (Normal) / +3.1dB SACD (Hot)
  • Absolute gain accuracy : -0.05dB
  • THD+N (997Hz, -1dBFs) : <-126dB (0.0005%, limited by DSD input signal)
  • Dynamic range (997Hz, -60dBFS) : >128dB (limited by DSD input signal)
  • Frequency response: fs=96kHz : -3dB: 0Hz…41kHz
  • Frequency response: fs=88.2kHz : -3dB: 0Hz…38.5kHz
  • Frequency response: fs=48kHz : -1dB: 0Hz…22kHz
  • Frequency response: fs=44.1kHz : -0.05dB: 0Hz…20kHz
  • Frequency response: fs=32kHz : -0.05dB: 0Hz…14.5kHz

  • (PCM to) DSD to Analogue Performance
    The following DSD to Analogue specifications are measured using an ADA-8 Path in PCM to DSD mode as the signal source (since no standard DSD test source is available). They are as the Analogue Line Output Module, except for the following:
  • Maximum input level : 0dB SACD (Normal) / +3.1dB SACD (Hot)
  • Absolute gain accuracy : ±0.1dB
  • THD+N (997Hz, -1dBFs) : <-100dB (0.001%)
  • Dynamic range (997Hz, -60dBFS) : >106dB
  • Frequency response : -0.05dB: 10Hz…35kHz
  • -3dB: 3.9Hz…40kHz
  • Reviews
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    Additional information
    For more information about the ADA-8XR DIO-DSD, please visit the website of Prism Sound
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