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Sound Devices 744T
High-Resolution Audio Recorder
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Portable,
High-Resolution Audio Recorder
The 744T is an ultra-portable, four-track file-based digital audio
recorder. Known for pleasant sounding microphone preamps, the 744T
is credited with frequency response linearity while maintaining
very low distortion and noise.
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Key Features of
SD-744T
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Two-channels of
Sound Devices next generation microphone preamps with phantom,
limiters, and high-pass filters
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Channel 3 and 4
line-level inputs on TA3 connectors
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Two-channel,
balanced mic/line level outputs on TA3 connectors
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Input-to-track
assignment with 256 possible routing combinations
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Records to internal
40 GB hard drive, removable Compact Flash, or both storage
medium
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AES3 (XLR) or AES3id
(unbalanced AES on BNC) digital inputs and AES3id
outputs
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Programmable,
sunlight-viewable LED level metering
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WAV or BWF format,
mono or poly files, uncompressed PCM audio
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24-bit or 16-bit
(with or without dither) and sampling at 32 kHz–192
kHz
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Ultra-stable Ambient
time code circuitry, tuneable to <0.2 PPM accuracy with all
relevant TC rates
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MP3 encode and
decode, 32 to 320 kb/s stereo file
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FireWire (IEEE-1394)
port for high-speed data transfer to computers
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6-pin modular C.
Link serial input and output for unit linking and future control
and expansion
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Removable Li-on
rechargeable battery compatible with Sony M- and L-mount Li-on
batteries
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10–18 VDC
external input powers and charges on-board battery
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Aluminum &
stainless-steel chassis for exceptional durability and light
weight
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Class-defining
compact size
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Designed for the
same operational environmental extremes as Sound Devices field
mixers
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Specifications of
SD-744T
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| Sampling
Frequency: |
internal: 32, 44.1, 48, 48.048, 88.2, 96, 96.096, 176.4,
192 kHz; external: 32–192 kHz via word clock
input |
| Internal
Data Path and Processing: |
32 bit, 192 dB dynamic
range |
| A/D, D/A
Converters: |
24 bit, 192 kHz sample rate maximum |
| A/D
Dynamic Range: |
114 dB, A-weighted bandwidth
110 dB, 20 Hz – 22 kHz bandwidth
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| D/A
Dynamic Range: |
112 dB, A-weighted bandwidth
108 dB, 20 Hz–22 kHz bandwidth
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| Frequency
Res. Mic or Line: |
10 Hz–40 kHz, +0.1, -0.5 (gain
controls centered), Fs 96 kHz |
| Equivalent Input Noise: |
Mic: -133 dBu max (-135 dBV), 50 ohm source, A-weighted
filter
Mic: -131 dBu max (-133 dBV) max, 50 ohm source, 20 Hz–20 kHz
BW flat filter, gain fully up
Mic: -130 dBu max (-132 dBV), 150 ohm source, A-weighted filter
Mic: -128 dBu max (-130 dBV), 150 ohm source, 20 Hz–20 kHz BW
flat filter, gain fully up
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| THD +
Noise: |
Mic: 0.004% max (1 kHz, 22
Hz–22 kHz BW, gain control down, -15 dBu input); line: 0.004%
max (1 kHz, 22 Hz–22 kHz BW, gain control down, +16 dBu
input)
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| Gain: (input dBu to -20
dBFS) |
mic (normal gain mode): 25 to 70 dB; mic (low gain mode):
10 to 55 dB; line: -6 to 18 dB, 0.1 dB increments
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| Input
Clipping Level: |
Mic input: -5 dBu minimum (normal
gain mode, gain control fully down); mic input: +10 dBu minimum
(low gain mode, gain control fully down); line input: +26 dBu
minimum (gain control fully down)
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| High-Pass
Filters: |
40, 80, 160, 240 Hz @ 12/18/24 dB/oct (all menu
selectable) |
| Mic
Powering: |
(each XLR selectable): 48 V phantom
through 6.8k resistors, 10 mA per mic available, menu-selected per
channel in mic or line level positions
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| Mic Input
Limiters: |
analog (pre-A/D converter), dual-stage optocoupler and
FET,
-4 dBFS threshold, 20:1 limiting ratio, 5 mS attack time, 200 mS
release time
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| Analog
Line Output Clipping Level: |
+24 dBu minimum, 10k ohm load
Attenuation & Resolution 0 to 40 dB, 1 dB increments
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| I/O
– Digital: |
AES3-id 75 ohm, 0.5 V p-p, S/PDIF compatible with RCA
adapter |
| Digital Storage: |
internal hard drive ATA-5 interface
1.8-in or 2.5-in hard drive 4200–7200 RPM supported, FAT32
formatted,; Compact Flash CF type I, II, and + (microdrive)
compatible, FAT32 formatted; file types: WAV or BWF, mono or
polyphonic; MP3 @ 64, 96, 128, 240, or 320 kb/s stereo; utilities:
format, speed test, and repair utility for internal HD and CF
volumes
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| Data
Transfer / Control: |
FireWire peripheral-mode,IEEE-1394a compliant, 6-pin
FireWire, Windows 2000, XP, Mac OS X only: C. Link 6-pin modular
input and output, RS-232 machine control, word clock, time code
transfer
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| Metering: |
76-segment (4 x 19),
sunlight-viewable, selectable peak, VU, or peak (with or without
peak hold) with VU ballistics, variable brightness
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| Time
Code: |
modes supported: free run, record run, 24 hour run,
continuous jam;
frame rates 23.976, 24, 25, 29.97DF, 29.97ND, 30DF, 30ND;
accuracy <0.2 ppm, when tuned with Ambient Master Controller;
holds TC clock for 8 hours after main battery removal (AA time code
battery installed); after 8 hours, retains time of day
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| Powering: |
operating cell, removable 7.2 V
(nominal) Sony M- or L-type Li-on, operational from 6 – 8 V;
time code battery, 1.2 V AA nickel metal-hydride; power supply
(external) 10–18 V, 1 A minimum, via locking 4-pin Hirose
connector, use Hirose #HR10-7P-4P (DigiKey# HR100-ND) for locking
mating DC connector; pin-4 = (+), pin-1 = (-) or pin-3 = (+) and
pin-2=(-).
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| Environmental: |
operation and storage: ambient
temperature 5–55° C, relative humidity (non-condensing)
<80% |
| Other: |
LCD Display 202 x 32 pixel, extended
temperature, backlit display; tone oscillator 100 Hz–10 kHz,
variable output, assigned to tracks or outputs
(menu-selectable);
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| Dimensions and Weight: |
45 mm x 209 mm x 125 mm (H x W x D)
1.8” x 8.2” x 4.9” mass unpackaged: 1.2 kg, (2.6
lbs) without battery |
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