Prism Sound Atlas Multichannel Audio Interface
Atlas and Titan are world classmulti-track interfaces offering flexible expansion and unsurpassable sonicclarity. Using the latest generation of Prism Sounds trusted conversion, Atlasprovides more preamps than Titan making It’suitable for a wider range ofrecording scenarios.
UNSURPASSED CLOCKING AND JITTERREJECTION
Prism Sounds history in developingtest and measurement equipment for the audio industry has allowed our engineersto get a much deeper understanding of digital clocking and its associatedissues.
DIGITAL MIXER WITH FLEXIBLEMONITORING
Atlas has a powerful built-indigital mixer that can be configured to provide a multitude of ultra lowlatency feeds, Including foldback to performers, stereo and surround outputs.
MIC PREAMPS
The Atlas boasts 8 ultra-clean,low-noise microphone preamps that perfectly compliment its transparent A/Dconversion (with software controllable phantom power, -20dB pad and Overkillerlimiter switches on each channel.)
FUTURE PROOF CONNECTIVITY
With a standard USB connectionAtlas can connect to the widest range of computers today and for theforeseeable future. Add to this the option of ProTools HDX and Dante modulesfor the most flexible and professional solution.
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, eachwith illuminated volume control
Master volume
Assignable encoder / push switchwith halo indication
Standby button
with standby indicator (alsoflashes when unit is in ‘identify’ mode)
Level Meters
10 x multi-segment bargraphs withoverload indication, 8 for analogue, 2 for digital, assignable to inputs oroutputs
Input selection
Indicate mode of analogue inputs1-8 as Mic / line / inst with phantom power indication for mic mode
Overkiller
For every analogue input, lit whenOverkiller limiters are acting
Digital Input
indicators for digital inputunlocked and SRC (sample-rate converter) selected
Digital Output
indicator for SRC (sample-rateconverter) selected
Sync
Master indicator, lit wheninterface is providing system sync
REAR PANEL
Mic / Line inputs
8 x combo connectors with XLRsockets for mic input and 6.3mm TRS jack sockets for line input (balanced orunbalanced)
Line outputs
8 x 6.3mm TRS jack sockets(balanced or unbalanced)
Digital inputs
1 x RCA 1 x TOSLINK for S/PDIF orADAT Optical input; (RCA can operate as AES3 input using XLR-RCA adaptersupplied)
Digital output
1 x RCA 1 x TOSLINK for S/PDIF orADAT Optical output; (RCA can operate as AES3 output using XLR-RCA adaptersupplied)
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
MDIO Expansion Slot
For alternative digitalmulti-channel I/O
Mains power
3-pin 6A IEC inlet
SOFTWARE SUPPORT
Mac OS Support
OS X 10.5 or later on Intel andApple M1 silicon
Windows OS Support
Windows Vista, 7 or 8, 32 or 64bit
Mac audio driver
Core Audio device
Windows audio driver
ASIO and WDM
Control Panel applet
Graphical user interface forcontrol of single or multiple Atlas units under Mac OS X or Windows.
ANALOG LINE INPUTS
Configuration
Electronically balanced, withfully-balanced analogue signal path
Input Sensitivity
Switchable ‘+4dBu’ (0dBFS =+18dBu) or ‘-10dBV’ (0dBFS = +6dBu)
Input Impedance
14.5k OHM
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 instrumentmode)
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 ofmid-side mics, or non-matrix mic-preamps (selectable for channels 1-4; whetherin line or mic mode)
MICROPHONE PREAMPLIFIERS
Configuration
Electronically balanced, withfully balanced analogue signal path
Gain
10dB to 65dB in 1dB steps (0dBFS =-56dBu to -1dBu)
Gain accuracy
+/-0.05dB
Input impedance
5.5k OHM
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 (0 OHMsource); -126.3dBu (150 OHM source)
+40dB gain: -130.9dBu (0 OHMsource); -127.6dBu (150 OHM source)
+50dB gain: -131.2dBu (0 OHMsource); -127.7dBu (150 OHM source)
+60dB gain: -131.4dBu (0 OHMsource); -127.8dBu (150 OHM 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, 18dBpad (0dBFS = -38dBu to 17dBu)
Gain accuracy
+/-0.05dB
Input impedance
1M OHM
ANALOG OUTPUTS
Configuration
Electronically balanced, withfully-balanced analogue signal path
Output amplitude
Switchable ‘+4dBu’ (0dBFS =+18dBu) or ‘-10dBV (0dBFS = +6dBu)
Output impedance
100 OHM balanced, 50 OHMunbalanced
Unbalanced mode
Automatic, with bootstrappinglevel 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 and96kHz
Channel Status
ignored
Word-length
24 bit
AES3 operation
via S/PDIF RCA, using RCA-XLRadaptor (supplied)
Sample-rate converter (SRC)
Selectable at S/PDIF input;allowing input at any sample rate
Bit transparency
Maintained (allows recording ofDolby 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 and96kHz
Channel Status
Full implementation, Consumer(S/PDIF) or professional (AES3)
Word-length
24 bit, or reduction to 16 bitsusing flat TPDF dither or Prism Sound SNS (Super Noise Shaping – four alternativeshapes available)
AES3 operation
via S/PDIF RCA, using RCA-XLRadaptor (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 (allowsplayback of Dolby or DTS streams to external decoder)
SYNCHRONIZATION
System sample rates
44.1 / 48 / 88.2 / 96 / 176.4 /192kHz
Master
local, Wordclock, DI (S/PDIFinput) or ADAT
Slave
bus master (another interface orHost 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 earssupplied)
Dimensions
Table top (inc feet):
W: 440mm D: 290mm H: 95mm
Rack-mount (inc ears):
W: 483mm D: 290mm H: 88mm
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 relativehumidity
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
