DNS 4

Four-Channel Noise Suppression
Processes up to four independent audio channels simultaneously, providing professional dialogue noise reduction in a compact portable unit.

Portable Design
Small, lightweight construction allows it to fit easily into an equipment bag or pocket for location work and field production.

CEDAR Dialogue Noise Suppression Technology
Uses CEDAR’s award-winning dialogue noise suppression algorithm to remove unwanted background noise while preserving speech clarity.

Near-Zero Latency Processing
Maintains extremely low delay to preserve lip-sync and support live monitoring applications.

Real-Time Noise Reduction
Delivers immediate suppression of background noise for live sound, broadcast, recording, and production environments.

Learn Function
Automatically identifies and tracks background noise characteristics without requiring noise samples or manual analysis.

Continuous Noise Tracking
Adapts in real time to changing noise conditions while processing audio.

Automatic Noise Detection
Continuously measures both the level and spectral content of unwanted noise.

Attenuation Control
Allows users to determine how much detected noise is removed from the signal.

Bias Control
Provides fine adjustment over noise detection behaviour, balancing maximum noise reduction against natural ambience retention.

Per-Channel Processing Control
Each channel can be adjusted independently for different microphones or sources.

Channel Linking
Multiple channels can be linked together so settings are adjusted simultaneously.

Stereo Pair Operation
Supports linked channel pairs for stereo workflows and dual-channel applications.

Four-Channel Grouping
All four channels can be grouped for unified operation and control.

Independent Learning per Channel
Noise analysis remains separate for each channel even when channels are linked.

Analogue Line Inputs
Supports professional analogue line-level audio sources.

Microphone Inputs
Provides dedicated microphone inputs with ultra low-noise preamplifiers for direct microphone connection.

Ultra Low-Noise Mic Preamps
Delivers clean microphone amplification suitable for professional dialogue capture.

48V Phantom Power Support
Offers selectable phantom power for condenser microphones on supported inputs.

AES3 Digital Inputs
Accepts professional digital audio signals through AES3 connectivity.

AES11 Synchronisation Support
Supports AES11 digital reference signals for broadcast and professional workflows.

Analogue Outputs
Provides analogue audio outputs for direct integration with mixers, recorders, and audio systems.

Digital Outputs
Includes AES3 digital outputs for end-to-end digital signal paths.

Selectable Analogue or Digital Workflow
Supports operation in analogue, digital, or hybrid audio environments.

Split Mode Routing
Duplicates inputs to additional channels, allowing different processing paths or creation of clean ISO tracks.

Input Gain Control
Provides adjustable input gain for optimizing signal levels.

High-Pass Filter
Includes a switchable filter to reduce low-frequency rumble and handling noise.

Per-Channel High-Pass Filtering
Each channel can have its filter enabled or disabled independently.

Visual Input Metering
Displays input signal levels for all four channels simultaneously.

Real-Time Processing Display
Provides immediate visual feedback for attenuation, bias, and processing status.

Signal-to-Noise Monitoring
Displays detected signal and noise levels to assist with optimization.

OLED User Interface
Features a bright display for monitoring and adjustment of all processing parameters.

Simple Front-Panel Operation
Designed for rapid setup and straightforward operation in demanding production environments.

Automatic Power Recovery
Automatically reboots after power interruption and restores operation.

Control Panel Lock Function
Prevents accidental changes to settings during operation.

Global Bypass Control
Allows all noise suppression processing to be bypassed instantly for comparison and troubleshooting.

Preview Bypass Mode
Temporarily disables processing while a button is held, enabling quick A/B comparison.

Firmware Update Support
Allows firmware upgrades through the integrated USB connection.

USB Connectivity
Provides access to firmware updates and onboard documentation.

12V DC Operation
Runs from standard 12V power sources for field and mobile applications.

Wide DC Input Range
Accepts a broad range of DC input voltages for flexible deployment.

Battery-Friendly Mobile Use
Suitable for use with portable power packs and remote-location setups.

Reverse Polarity Protection
Protects the unit against incorrect power connections.

Over-Voltage Protection
Includes built-in safeguards against excessive supply voltage.

Location Recording Ready
Optimized for on-location audio recording and production work.

Live Broadcast Ready
Suitable for live-to-air television and radio broadcasting applications.

Live Sound Ready
Designed for theatres, concert halls, conference venues, and houses of worship.

Environmental Noise Reduction
Reduces traffic, aircraft, vehicle, and urban noise from dialogue recordings.

HVAC Noise Suppression
Removes air conditioning and ventilation noise from speech recordings.

Wind and Weather Noise Reduction
Suppresses wind, rain, and other environmental interference.

Crowd and Babble Reduction
Reduces ambient crowd noise and background conversations.

Reverberation Reduction Assistance
Helps reduce the impact of excessive room ambience and poor acoustics.

Microphone Placement Compensation
Improves speech clarity when ideal microphone positioning is not possible.

Industry-Proven Technology
Built on the same DNS technology used throughout film production, broadcast, post-production, and forensic audio applications.

General Specifications
Product Type: Portable Dialogue Noise Suppressor
Processing Channels: 4
Technology: CEDAR Dialogue Noise Suppression
Processing Resolution: 40-Bit Floating Point
Latency: Near-Zero
Latency Specification: Less Than 4 ms
Portability: Portable Desktop Unit
Power Source: 12 VDC Nominal
Firmware Update Port: USB
Control Interface: Front Panel OLED Display With Encoder

Audio Processing
Dialogue Noise Suppression: Yes
Continuous Noise Learning: Yes
Learn Function: Yes
Attenuation Control: Yes
Bias Control: Yes
Global Bypass: Yes
Per-Channel Processing Control: Yes
Channel Grouping: Yes
High-Pass Filter: Yes
High-Pass Filter Frequency: 80 Hz
High-Pass Filter Slope: -18 dB/Octave
Noise Adaptation: Continuous Real-Time Analysis
Signal-To-Noise Ratio Monitoring: Yes

Channel Configuration
Processing Channels: 4
Independent Channel Operation: Yes
Linked Channel Operation: Yes
Supported Grouping: Channels 1&2
Supported Grouping: Channels 3&4
Supported Grouping: Channels 1&2 And 3&4
Supported Grouping: Channels 1&2&3&4
Split Mode Operation: Yes
Input Duplication To Channels 3&4: Yes

Line Inputs
Channels 1 & 2 Connector: Balanced XLR3F
Channels 3 & 4 Connector: Balanced TA3 Mini-XLR
Input Impedance: 10 kΩ
Nominal Signal Level: +4 dBu
ADC Line-Up: +4 dBu = -20 dBFS
Clipping Level: +24 dBu
Dynamic Range: >102 dB AES17 Unweighted
Gain Range Channels 1 & 2: -6 dB To +54 dB
Gain Range Channels 3 & 4: 0 dB To +20 dB

Microphone Inputs
Connector: Balanced XLR3F
Input Impedance: 2 kΩ
Gain Range: 18 dB To 78 dB
ADC Line-Up: -32 dBu = -20 dBFS At 36 dB Gain
Dynamic Range: >102 dB AES17 Unweighted
Microphone Preamplifiers: Ultra Low-Noise

Phantom Power
Type: P48
Standard: IEC 61958
Voltage: +48 V ±4 V
Current Available: 10 mA Per Microphone
Short Circuit Protection: Indefinite

AD/DA Conversion
Format: 24-Bit Linear PCM
Internal Sample Rate: 48 kHz
External Sync Range: 40 kHz To 100 kHz

Digital Inputs
Connector: Balanced TA3 Mini-XLR
Format: AES3 (IEC 60958)
Format: AES11 (DARS)
Supported Sample Rates: 44.1 kHz, 48 kHz, 96 kHz
Sync Range: 40 kHz To 100 kHz

Line Outputs
Connector: Balanced TA3 Mini-XLR
Nominal Output Level: +4 dBu
DAC Line-Up: -20 dBFS = +4 dBu
Maximum Output Level: +24 dBu
Dynamic Range: >96 dB AES17 Unweighted
Minimum Load Impedance: 600 Ω
Short Circuit Protection: Indefinite

Digital Outputs
Connector: Balanced TA3 Mini-XLR
Format: AES3 (IEC 60958)
Internal Sample Rate: 48 kHz ±50 ppm
External Sample Rate: Locked To Digital Input

DSP Specifications
DSP Type: Floating Point
Processing Resolution: 40-Bit
Supported Sample Rates: 44.1 kHz, 48 kHz, 96 kHz
Latency: <4 ms

Power Specifications
Input Voltage Range: 8 VDC To 17.5 VDC
Nominal Voltage: 12 VDC
Power Connector: Hirose 4-Pin HR10
Connector Polarity: Pin 1 Negative, Pin 4 Positive
Maximum Power Consumption: 10 W
Reverse Polarity Protection: Yes
Over-Voltage Protection: Up To 50 V

Power Adapter
AC Input Voltage: 85 VAC To 260 VAC
AC Frequency: 50 Hz To 60 Hz
Input Power: 15 W
Output Voltage: 12 VDC
Output Connector: Hirose 4-Pin HR10

Display And Controls
Display Type: OLED
Control Encoder: Rotary Push Encoder
Fixed Function Buttons: Power/Lock, Setup, Bypass
Channel Access Buttons: 4
Control Pages: Process, Channel Setup, Global Setup
Panel Lock Function: Yes
Automatic Brightness Dimming: Yes

Physical Specifications
Dimensions: 185 x 130 x 45 mm
Weight: 750 g

Environmental Specifications
Operating Temperature: 5°C To 30°C
Operating Humidity: 30% To 80% Non-Condensing

Connectivity
USB Port: Firmware Updates And Manual Access
Analogue Inputs: 4
Analogue Outputs: 4
Digital Inputs: AES3/AES11
Digital Outputs: AES3