Sound Devices 833 Portable Compact Mixer-Recorder

• 6 ultra low-noise, all-new microphone preamplifiers
• 8 channels, 6 buses, 12 tracks
• 6 analog outputs
• Ultra-accurate timecode
• 256 GB internal SSD, 2 SD card slots
• USB-A and C ports for SD-Remote app, linear fader control via MCU, keyboard, and file transfer
• Dugan Automixing for up to 8 channels

Portable Compact Mixer-Recorder

The 833 is the professional’s tool for mobile and small productions. Like the popular Sound Devices 633, the 833 is small, lightweight, and compact. A tactile interface with dedicated faders, trim knobs, and PFL switches makes this mixer-recorder ideal for run-and-gun bag use.

The 833 has 6 mic/line preamplifiers, 8 channels, 12 tracks, 6 analog outputs, and ultra-accurate timecode. Many features have carried over from the premium Sound Devices’ Scorpio, such as Sound Devices’ new preamplifier design, 2 SD card slots, dual L-Mount battery charging and powering, and an internal 256 GB SSD.

Additionally, the 833 shares the same processing architecture and multiple FPGAs as the Scorpio. This enables the 833 to be fully routable, and any physical input can be routed to any track. The 833 features both digital and analog inputs and outputs, and has multiple powering options, so it will fit effortlessly into your existing kit.

A built-in three band EQ may be set to either pre- or post-fade for each channel to tackle any problems directly on-set. Enable Dugan Automixing to automatically attenuate unused microphones in multi-microphone applications. Up to 8 channels can be automixed at a time, and two separate groups can be mixed simultaneously.

Dedicated coms and slate allows for professional bi-directional communication with other crew members. Send customized mixes to the camera or crew with multiple mix buses. With the ability to record to three media simultaneously, you can turn over SD cards to production at the end of the day while keeping a backup on the internal 256 GB SSD.

The 833 may be controlled via the companion Android app, SD-Remote, which features transport controls, metering, and sound reports. For an instant mobile workstation, choose from one of several supported USB control surfaces for remote fader and transport control.

Freq. Response
• 10 Hz to 80 kHz ± 0.5 dB (192 kHz sample rate, re 1 kHz)

THD + Noise
• 0.005% max (1 kHz, 22 Hz–22 kHz BW, trim @20, fader @ 0, -10 dBu in)

Equivalent Input Noise
• -131 dBV (-129 dBu) max (A-weighting, 76 dB gain, 150 ohm source impedance)

Processing Engine
• Highly extensible, full FPGA-based audio processing, 3 FPGAs
• Six-way ARM multiprocessor system
• 64-bit audio processing precision

Inputs
• Mic/Line inputs 6 total, all fully featured; 3 on full-size XLR, 3 on TA3
• Mic-level inputs: (XLR, TA3): Class-A, discrete differential long-tail pair, 4k ohm input impedance
• Line-level inputs: (XLR, TA3,): active-balanced, 4k ohm input impedance
• 48V phantom: full 10mA to all 6 inputs simultaneously
• AES3 or AES42 available on XLR input 1
• AES42: +10 V, 250 mA available, mode-1, auto-ASRC
• Aux (3.5 mm/10-pin): unbalanced 2-channel, 4k ohm input impedance
• Com Rtn (TA3, 3.5mm) balanced, 1-channel, 8k ohm input impedance
• External Slate Mic (TA5): balanced, 8k ohm input impedance, menu-selectable 12 V phantom

Maximum Input Level
• Mic: +8 dBu (2.0 Vrms)
• Line: +28 dBu (19.5 Vrms)
• Rtn A, B, C: +18 dBu (6.2 Vrms)
• Com Rtn 1, 2: +24 dBu (12.3 Vrms)
• External Slate Mic: +12 dBu (3.2 Vrms)

High-Pass Filters
• Adjustable 10 Hz to 320 Hz, 18 dB/oct. 1st stage analog (before preamp), 2nd stage digital.

Limiters
• Limiters available at all channels, buses, headphones, for all sample rates
• Analog first stage, all subsequent stages digital
• Attack time: 1 ms
• Release time: adjustable, 50 ms to 1000 ms
• Threshold: adjustable, -2 dBFS to -12 dBFS
• Selectable ratio: inf:1, 20:1, 18:1, 16:1, 14:1, 12:1, 10:1

Delay
• Channel Adjustable 0-50 ms
• Output Adjustable 0-500 ms

Maximum Gain
• Trim stage (mic input): 76 dB
• Trim stage (line input): 50 dB
• Fader stage: 16 dB
• Bus stage: 16 dB
• Headphone stage: 20 dB
• Mic-to-Line: 108 dB
• Mic-to-Headphone: 112 dB

Outputs
• XLR (L, R) active-balanced, 250/3.2k/120 ohms (mic/-10/line)
• TA3 (X1/X2) active-balanced, 250/3.2k/120 ohms (mic/-10/line)
• 3.5mm (X3/X4): unbalanced, stereo, 1.8k ohms

Headphone Outputs
• ¼”, 3.5 mm
• TA5 (along with mic input pins) for single connection to headset + mic
• High output, 4 ohm output impedance, 400 mW + 400 mW at each connector, all individually driven
• Compatible with headphones of any impedance

Maximum Output Level(all into 10k load)
• Line: +20 dBu (7.8 Vrms)
• “-10”: +6 dBu (1.5 Vrms)
• Mic: -20 dBu (0.078 Vrms)
• X3/X4 Out: +6 dBu (1.5 Vrms)
• Headphone outputs (¼”, TA-5): +14 dBu (4.0 Vrms)

A/D converters
• 32-bit, 120 dB, A-weighted dynamic range typical
• Sampling rates 44.1 kHz, 47.952 kHz, 48 kHz, 48.048 kHz, 88.2 kHz, 96 kHz, 192 kHz

Digital Outputs
• AES3 transformer-balanced, in pairs; 1-2 (XLR-L), 3-4 (XLR-R), 110 ohm, 2 V p-p, AES and S/PDIF compatible

Recording
• Internal 256 GB SSD
• Two removable SD Cards
• Simultaneous recording to internal SSD and the two SD cards
• exFAT formatting
• 12 tracks (8 iso channels, 4 buses)
• Broadcast WAV monophonic and polyphonic file format
• 64-bit WAV (RF64) monophonic and polyphonic; support for files > 4 GB

Automixing
• Dugan Automixing up to 8 channels on left and right mix bus

USB
• USB-C (USB 3.1 type 1) for file transfer of internal SSD, both SD Cards
• USB-A host for keyboard, external controller, external USB hubs supported for connecting multiple devices

Timecode and Sync
• Modes Supported: Off, Rec Run, Free Run, 24h Run, External, including External Auto-Record and Continuous modes.
• Frame Rates: 23.98, 24, 25, 29.97 DF, 29.97 ND, 30 DF, 30 ND• Sample/Timecode Accuracy: 0.1 ppm (0.25 frames per 24 hours)
• Timecode Input: 20k ohm impedance, 0.3 V - 3.0 V p-p (–17 dBu - +3 dBu)
• Timecode Output: 75 ohm impedance, 5 V p-p (+12 dBu)
• Word Clock Input: 10k/75 ohm selectable impedance, 1-5 V p-p input sensitivity
• Word Clock Output: 75 ohm impedance, 5 V p-p output, at SR

Remote Control
• USB MIDI Control - 3rd party fader controllers
• SD-Remote Android app
• USB Keyboard
• External Timecode Record Trigger

LCD
• 320x240, Transflective, excellent sunlight visibility
• Larger touchscreen display available via USB-connected SD-Remote app

Power
• External: 10-18 V input on locking TA4 connectors, pin-4 = (+), pin-1 = (-)
• Dual rear-mount Sony-style L-mount batteries with chargers
• Idle Current Draw: 875 mA @ 12 V (10.5 W)
• Intelligent power-down of unused mic preamps and other internal circuits

Environmental
• Operating: -20° C to 60° C, 0 to 90% relative humidity (non-condensing)
• Storage: -40° C to 85° C

Dimensions (H x W x D)
• 5.1 cm x 22 cm x 17 cm; (2.0 in. x 8.7 in. x 6. in)

Weight
• 2.75 lbs (unpackaged, without batteries) 1.25 kg (unpackaged, without batteries)