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Sound Device Audio Recorders 744T (SD7AR44T)

Sound Device Audio Recorders 744T

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Desciption

Intuitive Control

No other recorder on the market matches its size, features, and durability. In addition, the 744T is designed to place an abundance of control in the hands of the user, while the menu architecture provides intuitive operation. The onboard time code generator and Sony-compatible Li-ion camcorder battery makes the 744T ready for any recording job—from over-the-shoulder to cart-based production.

Data Storage and Transfer

The 744T records uncompressed PCM or compressed MP3 audio to its internal hard drive, a Compact Flash card, and an external FireWire drive allowing for flexibility to compliment the required workflow. It can be connected to Mac OS or Windows computers with FireWire 400 for high-speed data transfer.

Unmatched Portability

The 744T possesses unmatched capability for its compact package when used as stand-alone portable recorder. It truly excels when preceded by a portable audio mixer such as Sound Devices' 664, 552 or 302.

744T Key Features List

  • Two-channels of Sound Devices next generation microphone preamps with phantom, limiters, and high-pass filters
  • Channel 3 and 4 line-level inputs on TA3 connectors
  • Two-channel, balanced mic/line level outputs on TA3 connectors
  • Input-to-track assignment with 256 possible routing combinations
  • Record to its internal 250 GB hard drive, removable CompactFlash, external FireWire drive, or any combination of the three
  • AES3 (XLR) or AES3id (unbalanced AES on BNC) digital inputs and AES3id outputs
  • Programmable, sunlight-viewable LED level metering
  • WAV (Broadcast Wave compliant), mono or poly files, uncompressed PCM audio
  • 24-bit or 16-bit (with or without dither) and sampling at 32 kHz–192 kHz
  • Ultra-stable Ambient time code circuitry, tuneable to <0.2 PPM accuracy with all relevant TC rates
  • MP3 and FLAC record and playback capability
  • FireWire (IEEE-1394) port for high-speed data transfer to computers
  • 6-pin modular C. Link serial input and output for unit linking and future control and expansion
  • Removable Li-on rechargeable battery compatible with Sony M- and L-mount Li-on batteries
  • 10–18 VDC external input powers and charges on-board battery
  • Aluminum & stainless-steel chassis for exceptional durability and light weight
  • Class-defining compact size
  • Designed for the same operational environmental extremes as Sound Devices field mixers

Specification

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

D/A Dynamic Range

  • 112 dB, A-weighted bandwidth
  • 108 dB, 20 Hz–22 kHz bandwidth

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

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)

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

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)

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

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

Analog Line Output Clipping Level

  • +24 dBu minimum, 10k ohm load
  • Attenuation & Resolution 0 to 40 dB, 1 dB increments

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

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

Metering

  • 76-segment (4 x 19), sunlight-viewable, selectable peak, VU, or peak (with or without peak hold) with VU ballistics, variable brightness

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

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=(-).

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);

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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