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Prism Sound Atlas HDX Recording Interface

Prism Sound Atlas HDX front

The Prism Sound Atlas with HDX card is a 24-bit/192 kHz, multi-channel USB audio recording interface featuring 8 Analogue I/O with world-class Prism Preamp, ADAT I/O, S/PDIF and AES I/O, MIDI I/O and MDIO Slot

Atlas is a USB multichannel interface aimed at multi-tracking applications featuring eight of the high-grade mic preamps found on Orpheus, Lyra and Titan. The later models including Lyra, Titan and Atlas feature a 20dB pad on each mic channel to accommodate high sound pressure level (SPL) applications such as drums or close miked guitars or brass.

Our low noise, low distortion, extremely neutral mic pre design has gained a cult popularity amongst existing Prism Sound users and we are pleased to be able to offer a single box solution for producers, artists and engineers demanding high quality front end and with the added benefits of Prism Sound A/D and D/A conversion.

Singal Path

Eight analogue input channels and up to 10 digital input channels are available as inputs for your audio workstation software through the host computer's audio driver. Similarly, eight analogue output channels, up to 10 digital output channels and stereo headphone outputs can play 20 different channels. For low-latency foldback or monitoring to headphones or main outputs, each output pair (1-2, 3-4 etc or the headphone output) can optionally be driven from the built-in DSP mixer with an individual local mix of any selection of inputs through the controller applet. All analogue inputs are electronically balanced with automatic unbalanced operation. Analogue outputs are electronically balanced with 'bootstrapping', i.e. level is maintained if one leg is grounded.

MDIO Expansion

As well as the built-in inputs and outputs Atlas can accommodate other optional digital interfaces such as Pro Tools | HDX and AES3 multichannel options through its MDIO expansion slot. This flexibility makes Atlas perfectly suitable for the home, native or project studio as well as larger multitracking facilities by seamless, reliable integration with the industry standard platforms. The MDIO expansion means Atlas is future-proof allowing further digital interface options to be developed and available such as Thunderbolt (to be confirmed).

Atlas Mic Preamps

  • Digitally controlled gain, fully balanced analogue signal path
  • 55dB of gain in 1dB steps
  • Incredibly transparent:
    • 0.00016% THD (+10dB gain: -116db @ -0.1dBFS)
    • 0.00040% THD+N (+10dB gain: -108dB @ -0.1dBFS)
    • ±0.05 gain accuracy
  • Switchable phantom power, 20dB pad, Overkiller soft limiter, phase, high-pass and RIAA filter on all mic inputs
  • Mid and Side encoder on all mic input pairs.
  • Line input functionality

Featuring a similar feature set to Titan (including the MDIO expansion slot for optional Pro Tools HDX, AES and potentially other digital cards), Atlas is just at home in the project and multi-track studio for recording, mixing, stereo and stem mastering.

Atlas in Brief

  • 8x analogue I/O (switchable mic/line/instrument modes)
    • 8x high-grade mic pres
    • 2x high impedance, instrument inputs
  • MDIO slot for optional digital interfaces (initially Pro Tools HDX and AES)
  • ADAT I/O (with SMUX and TOSlink functionality)
  • Built-in stereo SPDIF/AES I/O
  • MIDI I/O
  • Wordclock I/O
  • 2x Headphone outputs (sharing a single stereo bus)
  • Ethernet port (for future potential AVB and networking integration)
  • USB 2.0 host
  • 192kHz, 24bit
  • Latest award-winning Prism Sound CleverClox clocking technology
  • Mac OS X and Windows compatible

Prism Sound Atlas Technical Specifications

FRONT PANEL

  • Instrument Inputs 2 x 6.3mm mono jack sockets, auto-select to analogue inputs 1 & 2 when plugged
  • Headphone Outputs 2 x 6.3mm stereo TRS Jacks, each with illuminated volume control
  • Master volume Assignable encoder / push switch with halo indication
  • Standby button with standby indicator (also flashes when unit is in 'identify' mode)
Indication:
  • Level Meters 10 x multi-segment bargraphs with overload indication, 8 for analogue, 2 for digital, assignable to inputs or outputs
  • Input selection Indicate mode of analogue inputs 1-8 as Mic / line / inst with phantom power indication for mic mode
  • Overkiller For every analogue input, lit when Overkiller limiters are acting
  • Digital Input indicators for digital input unlocked and SRC (sample-rate converter) selected
  • Digital Output indicator for SRC (sample-rate converter) selected
  • Sync Master indicator, lit when interface is providing system sync

REAR PANEL

  • Mic / Line inputs 8 x combo connectors with XLR sockets for mic input and 6.3mm TRS jack sockets for line input (balanced or unbalanced)
  • Line outputs 8 x 6.3mm TRS jack sockets (balanced or unbalanced)
  • Digital inputs 1 x RCA, 1 x TOSLINK for S/PDIF or ADAT Optical input; (RCA can operate as AES3 input using XLR-RCA adapter supplied)
  • Digital output 1 x RCA, 1 x TOSLINK for S/PDIF or ADAT Optical output; (RCA can operate as AES3 output using XLR-RCA adapter supplied)
  • MIDI I/O 2 x 5 Pin DIN sockets (in and out)
  • Wordclock 2 x BNC sockets, output and input (75R)
  • USB port 1 x USB 2 port
  • Ethernet port For future expansion / AVB
  • MDIO Expansion Slot For alternative digital multi-channel I/O
  • Mains power 3-pin 6A IEC inlet

SOFTWARE SUPPORT

  • Mac OS Support OS X 10.4 or later, Intel platform
  • Windows OS Support Windows Vista, 7 or 8, 32 or 64 bit
  • Mac audio driver Core Audio device
  • Windows audio driver ASIO device
  • Control Panel applet Graphical user interface for control of single or multiple Atlas units under Mac OS X or Windows.

ANALOGUE LINE INPUTS

  • Configuration Electronically balanced, with fully-balanced analogue signal path
  • Input Sensitivity Switchable '+4dBu' (0dBFS = +18dBu) or '-10dBV' (0dBFS = +6dBu)
  • Input Impedance 14.5kΩ
  • Unbalanced Mode Automatic
  • Total harmonic distortion -117dB (0.00014%, -0.1dBFS)
  • THD+N -111dB (0.00028%, -0.1dBFS)
  • Dynamic Range 116dB (-60dBFS)
  • Gain Accuracy ±0.05dB
  • LF roll-off -0.05dB at 8Hz; -3dB at 1Hz
  • HF roll-off
    fs = 44.1kHz: -0.05dB at 21.1kHz; -3dB at 22.0kHz
    fs = 48kHz: -0.05dB at 23.0kHz; -3dB at 23.9kHz
    fs = 96kHz: -0.05dB at 32.0kHz; -3dB at 47.9kHz
    fs = 192kHz: -0.05dB at 32.0kHz; -3dB at 78kHz
  • CMRR 20Hz..20kHz: >70dB
  • Inter-channel cross-talk 1kHz: 140dB; 20Hz..20kHz: -120dB
  • Inter-channel phase 10Hz..5kHz: ±0.25°, 5kHz..20kHz: ±1.0°, 20kHz..50kHz: ±2.0°,
  • Overkiller Progessive limiter, auto-aligning, selectable per channel
  • Impact Filter High-pass filter, -3dB at 80Hz, 40dB/decade (selectable for channels 1-4; whether in line, mic or instrument mode)
  • RIAA de-emphasis filter Response accuracy: ±0.22dB at fs=44.1kHz; ±0.14dB at fs=48kHz; ±0.015dB at other sample rates
  • M-S matrix Allows direct connection of mid-side mics, or non-matrix mic-preamps (selectable for channels 1-4; whether in line or mic mode)

MICROPHONE PREAMPLIFIERS

  • Configuration Electronically balanced, with fully balanced analogue signal path
  • Gain 10dB to 65dB in 1dB steps (0dBFS = -56dBu to -1dBu)
  • Gain accuracy ±0.05dB
  • Input impedance 5.5kΩ
  • THD +10dB gain: -116dB at -0.1dBFS (0.00016%), +40dB gain: -110dB at -0.1dBFS (0.00032%)
  • THD+N +10dB gain: -108dB at -0.1dBFS (0.00040%)
  • Equivalent input noise (EIN)
    +30dB gain: -128.5dBu (0Ω source); -126.3dBu (150Ω source)
    +40dB gain: -130.9dBu (0Ω source); -127.6dBu (150Ω source)
    +50dB gain: -131.2dBu (0Ω source); -127.7dBu (150Ω source)
    +60dB gain: -131.4dBu (0Ω source); -127.8dBu (150Ω source)
  • LF roll-off -0.05dB at 20Hz, -3dB at 5Hz
  • HF roll-off As per analogue line input data (dependent on fs)
  • CMRR 50Hz/60Hz: >110dB at all gains 1kHz: >100dB at all gains 20kHz: >90dB at all gains
  • Phantom power +48V, switchable per channel
  • Pad -20dB, switchable per channel

INSTRUMENT PREAMPLIFIERS

  • Configuration Unbalanced, high impedance buffer
  • Gain 10dB to 65dB in 1dB steps, 18dB pad (0dBFS = -38dBu to 17dBu)
  • Gain accuracy ±0.05dB
  • Input impedance 1MΩ

ANALOGUE OUTPUTS

  • Configuration Electronically balanced, with fully-balanced analogue signal path
  • Output amplitude Switchable '+4dBu' (0dBFS = +18dBu) or '-10dBV (0dBFS = +6dBu)
  • Output impedance 100Ω balanced, 50Ω unbalanced
  • Unbalanced mode Automatic, with bootstrapping level compensation
  • Total harmonic distortion -107dB (0.00045%, -1dBFS)
  • THD+N -106dB (0.00050%, -0.1dBFS)
  • Dynamic range 115dB (-60dBFS)
  • Gain accuracy ±0.05dB
  • LF roll-off -0.05dB at 8Hz, -3dB at 1Hz
  • HF roll-off
    fs = 44.1kHz: -0.05dB at 21.4kHz; -3dB at 22.0kHz
    fs = 48kHz: -0.05dB at 23.2kHz; -3dB at 23.9kHz
    fs = 96kHz: -0.05dB at 32.0kHz; -3dB at 47.8kHz
    fs = 192kHz: -0.05dB at 32.0kHz; -3dB at 76kHz
  • Output balance >50dB
  • Inter-channel cross-talk 1kHz: 135dB; 20Hz..20kHz: -120dB
  • Inter-channel phase 10Hz..5kHz: ±0.4°, 5kHz..20kHz: ±0.25°, 20kHz..50kHz: ±0.5°,

DIGITAL INPUTS

  • Formats supported S/PDIF (RCA or TOSLINK), ADAT, ADAT S/MUX (TOSLINK)
  • Sample rates supported
    S/PDIF (2 channel): 44.1, 48, 88.2, 96, 176.4 and 192kHz
    ADAT (8 channel) 44.1 and 48kHz
    ADAT S/MUX (4 channel): 88.2 and 96kHz
  • Channel Status ignored
  • Word-length 24 bit
  • AES3 operation via S/PDIF RCA, using RCA-XLR adaptor (supplied)
  • Sample-rate converter (SRC) Selectable at S/PDIF input; allowing input at any sample rate
  • Bit transparency Maintained (allows recording of Dolby or DTS streams)

DIGITAL OUTPUTS

  • Formats supported S/PDIF (RCA or TOSLINK), ADAT, ADAT S/MUX (TOSLINK)
  • Sample rates supported
    S/PDIF (2 channel): 44.1, 48, 88.2, 96, 176.4 and 192kHz
    ADAT (8 channel) 44.1 and 48kHz
    ADAT S/MUX (4 channel): 88.2 and 96kHz
  • Channel Status Full implementation, Consumer (S/PDIF) or professional (AES3)
  • Word-length 24 bit, or reduction to 16 bits using flat TPDF dither or Prism Sound SNS (Super Noise Shaping - four alternative shapes available)
  • AES3 operation via S/PDIF RCA, using RCA-XLR adaptor (supplied)
  • Sample-rate converter (SRC) Selectable at S/PDIF output; output rate can be referenced to Wordclock, DI or local clock at 44.1, 48, 88.2, 96, 176.4 or 192kHz
  • Bit transparency Maintained in 24 bit mode (allows playback of Dolby or DTS streams to external decoder)

SYNCHRONIZATION

  • System sample rates 44.1 / 48 / 88.2 / 96 / 176.4 / 192kHz
Sync sources:
  • Master local, Wordclock, DI (S/PDIF input) or ADAT
  • Slave bus master (another interface or Host computer)
  • Local clock accuracy ±50ppm
  • Jitter rejection >60dB / decade above 100Hz
  • Internal mixer delay (total analogue in to out)
    fs = 44.1kHz: 0.56ms;
    fs = 48kHz: 0.52ms;
    fs = 88.2kHz: 0.2ms;
    fs = 96kHz: 0.18ms;
    fs = 176.4kHz: 0.09ms;
    fs = 192kHz: 0.08ms;

PHYSICAL

  • Form factor 2u 19inch rack mountable (rubber feet and rack ears supplied)
  • Dimensions Table top (inc feet): W: 440mm D: 290mm H: 95mm
  • Rack-mount (inc ears):W: 483mm D: 290mm H: 88mm (2u)
  • Power:
    90-250VAC, 50/60Hz
    internal power supply
    IEC 6A connector
  • Power consumption 35W
  • Fuse rating 0.5A(T), 20mm, ceramic
  • Weight: 5kg
  • Operation ambient conditions 0 to 35°C, 85% maximum relative humidity

SUPPLIED ACCESSORIES

  • Printed manual x 1
  • Software CD x 1
  • IEC mains lead x 1
  • 19" Rackmount ears x 2 (pair)
  • Allen key (for rack ears) x 1
  • USB lead x 1
  • XLR-F to RCA-M adaptor (S/PDIF/AES3) x 1
  • XLR-M to RCA-M adaptor (S/PDIF/AES3) x 1

MDIO EXPANSION CARDS

  • MDIO-PTHDX Cards
  • MDIO-DANTE Cards

GUARANTEE

  • Comes with Prism Sound's 3 year guarantee

Except where otherwise stated, audio performance data are RMS, unweighted, 20Hz..20kHz figures, measured at 997Hz, using fs = 96kHz and '+4dBu' sensitivity settings.

In keeping with our policy of continual development, specifications are subject to amendment without notice. E&OE.

All Trade Marks Acknowledged.

The rear panel photograph shows the optional MDIO card fitted.

Prism Sound Atlas Drum recording