Sound Devices 744T

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sd744-sqr.png

Sound Devices 744T

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The 744T is a four-track digital audio recorder that writes and reads uncompressed PCM audio or compressed formats being MP3 or MP2. The internal storage can be expanded with Compact Flash cards, and external FireWire drivers.
 

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Specs:

System

  • Sampling Frequency internal: 32, 44.1, 47.952, 48, 48.048, 88.2, 96, 96.096, 176.4, 192 kHz external clocking: 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 sampling rate maximum, A/D converters on socketed, field-upgradeable daughter board
  • 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
  • Metering: 76-segment (4 x 19), sunlight-viewable selectable peak, VU, or peak (with or without peak hold) with VU ballistics, variable brightness

Analop Input

  • Frequency Response Mic or Line: 10 Hz–40 kHz, +0.1, -0.5 dB (gain controls centered)
  • Equivalent Input Noise 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: Mic (normal gain mode): 24.3–67.4 dB, Mic (low gain mode): 9.3–52.4 dB, Mic (normal, fades to off gain mode): off (0)–67.4 dB, Mic (low, fades to off gain mode): off (0)–52.4 dB, Line: -6–18 dB, 0.1 dB increments
  • Input Impedance Mic (XLR): 7.5k Ω Line (XLR and TA3): 20k Ω
  • 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)
  • Input Topology Mic and Line: fully electronically balanced, RF, ESD, short, and overload protected; pin-2 hot, pin-3 cold
  • Gain Matching Line inputs: ±0.1 dB, channel-to-channel
  • CMRR Mic: 40 dB minimum at 80 Hz
  • 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 Ω resistors, 10 mA per mic available
  • 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

Output Analog

  • Line Output Clipping Level: +20 dBu minimum, 10k Ω load Attenuation & Resolution 0–40 dB, 1 dB increments
  • Output Topology Line: fully electronically-balanced, RF, ESD, short, and overload protected; pin-2 driven hot, pin-3 driven cold; let pin-3 float for unbalanced connections.

Inputs/Outputs – Digital

  • AES3-id: 75 Ω, 0.5 V p-p, S/PDIF compatible with RCA adapter

Digital Storage: 

  • Internal hard drive: SATA interface 2.5-in hard drive 4200–7200 RPM supported, FAT32 formatted, up to 2 TB addressable serial numbers below 461509071000 use ATA-5 interface 1.8-in or 2.5-in hard drive 4200–7200 RPM supported, FAT32 formatted, up to 2 TB addressable
  • CompactFlash: CF type I, II, and + (microdrive) compatible, FAT32 formatted, up to 2 TB addressable
  • File Types: WAV (AES-31 format), mono or polyphonic, at supported Fs, 24-bit or 16-bit FLAC, (Free Lossless Audio Codec) MP3 @ 32, 64, 96, 128, 160, 192, 256, or 320 kb/s stereo MP2 @ 64, 96, 128, 160, 192, 256, or 320, 384 kb/s stereo
  • Utilities format, and speed test for internal HD, CF, and external drive volumes

Data Transfer

  • FireWire: drive-mode, IEEE-1394a compliant, 6-pin FireWire, Windows 2000, XP, Vista, Mac OS X only
  • C. Link: 6-wire modular input and output, RS-232 machine control, word clock, time code transfer

Timecode

  • Modes Supported: free run, record run, 24 hour run, external time code receive
  • Frame Rates: 23.976, 24, 25, 29.97DF, 29.97ND, 30DF, 30ND, 30+
  • Accuracy: <0.2 ppm, when tuned with Ambient Master Controller, holds TC clock for 8 hours after main bat- tery removal (AA time code battery installed); after 8 hours, retains time of day
  • Input / Output: 20k Ω impedance, 0.3V p-p (–8 dBu) minimum / 1k Ω impedance, 3.0V p-p (+12 dBu)