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FM and HD Audio Processor

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SOUND4 FIRST is designed to deliver a sound of uncompromising quality, this tool gives you 2-band processing, a digital stereo generator and an IMPACT Clipper.

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FIRST $3,094.00
  • SOUND4 FIRST provides all the most important functionalities you need in an FM/HD processor and sets the bar high both in terms of performance and affordability. Designed to deliver a sound of uncompromising quality, this tool gives you 2-band processing, a digital stereo generator and an IMPACT Clipper.

    One of the most important advantages of this product is the fact that audio airs just three seconds after powering  on the device. This tool is fully BS-412 compliant and comes with an HD Limiter, a Low Distortion Bass Clipper and a Low Distortion FM Limiter. SOUND4 FIRST has Analog, Digital and AES-67/Livewire inputs and outputs, as well as an MPX FM output. It also solves the so-called “blending problem” resulting from the switch of receivers from stereo to mono, bringing you a constant level of clear audio.

    The impressive backup functionalities ensure a reliable, uninterrupted audio feed. SOUND4 FIRST provides a streaming output fully compatible with all standard servers, including HLS.
    Software Options Available *
    There are a number of options and additional features that make the SOUND4 FIRST even more valuable. These include Basic and Full RDS, Streaming Extension, IP TX + RX and Dual IP TX + RX to name but a few. A full list of all software options is available below:
    Basic RDS Encoder
    Full RDS Encoder
    Streaming Extension
    IP Tx
    IP Tx2
    IP Rx
    IP Rx2
    IP RX + Tx
    Dual IP Tx + RX
    IP Pass Through
    Emergency URL Player
    Emergency Audio Player
    * All Software Options are subject to an additional payment. For pricing please Contact Us.
    SOUND4 FIRST has a compact 1U case and a dual power supply which is a standard feature of all SOUND4 In-box products and ensures uninterrupted operation of the unit, as well as a user-friendly remote control interface to provide clients with easy setup - a clever choice for your station.
    • Dual Power supply
    • 2 Processing path: FM & HD
    • Inputs: 2 AES/EBU 32 to 192 kHz, 2 analog, 2 AES-67/Livewire or 2 IP Codec (SOUND4 IP CONNECT), 2 SUB 
    • (insert for RDS/RBDS...)
    • Outputs: 2 AES/EBU 32 to 192 kHz, 2 analog, 2 AES-67/Livewire or 2 IP Codec (SOUND4 IP CONNECT), 2 MPX
    • Digital AES/EBU and wordclock synchronization inputs.
    • 3 independent Ethernet ports: Admin, AES-67, IP-CONNECT
    • GPIO: 8 inputs, 8 outputs, advanced management with scripts
    • GPS Sync for System time and AoIP Sync
    • Micro SD: High capacity management, SDXC compatible standard (up to 2TB), for music storage and more
    • Two USB ports: front and rear (for preset & upgrade loading and other functionalities)
    • Headphone output on front panel with the possibility to listen each Input or Output
    • Full Routing management: Patch points with Insert and Mix on all stages, routing of signals to any Inputs and 
    • Outputs
    • Automatic failover input switching with crossfade
    • Diversity Delay: up to 20 seconds
    • Relay switch for automatic by-pass
    • Fully controllable from front Panel
    • GUI remote control compatible 32 & 64 bits - Windows 7, Windows 8 & 8.1, Windows 10, 2008 R2, 2012 and Linux 
    • (Debian)
    • HTML5 GUI: Inputs and outputs setup, preset change, upgrades...
    • Start-up time of SOUND4 FIRST: 2 seconds to be on air (Analog Input or AES/EBU input)
    • Total DSPs computing power for audio Processing: 16,2 Giga Flops (Sharc 40 bits with floating point + other DSPs)
    • Total ARMs computing power for product management and extra functions: 4 GMips

     User-Friendly Control Interface

    • Sound setting from one single screen - you no longer need to open and close windows to go from one function to 
    • another
    • Two modes - Basic and Advanced. Basic mode provides simplicity and rapidity; Advanced mode allows you to explore 
    • all the processor functionalities. There are also ultra-rapid VU meters for true control over modulation
    • Advanced meterings with FFT and MPX Power
    • Unlimited “Undo/Redo” versioning function for presets with possibility of recall
    • Innovative “compare to reference” function
    • Log comment feature follow each preset
    • A readable and interactive path diagram
    • A remote connection manager to control several processors
    • Works with the following operating systems - WXP SP3, W7 32& 64 bits, W8 32 & 64 bits, WS 2008 R2, WS 2012, Linux 
    • (Debian)



    • HQ Sound, main sampling process frequency of 192 kHz.
    • 2-band AGC
    • 2-band limiter
    • 4-band EQ
    • Final limiters:
    • FM path - Bass Clipper + FM Limiter + MPX Limiter
    • HD path - Look Ahead limiter for the HD output
    • Voice Smoother to avoid distortion problems on certain voices
    • BS412 compliant MPX power controller
    • Typical processing delay at 1 KHz:
    • HD output: 3 to 6 ms
    • FM output: 18.5 ms
    • MPX output: 25 ms


    Other key points:

    • 19 kHz embedded pilot to gain close to 1 dB more in loudness!
    • Auto-Mono: Switch off pilot 19 KHz on mono sources for better receiving in FM
    • Stereo Matrixing for better stability in loudness and sound tone when the receiver switches from mono/stereo/mono
    • Adjustable Filters Frequencies in 2-band AGC and 2-Band Limiter



    • Basic RDS encoder (with scrolling PS)
    • Full RDS (UECP-compatible)
    • IP Codec - SOUND4 IP CONNET (manage up to 32 Links!)
    • Emergency Player: Audio program backup, 2 music libraries, 1 Jingle Library + rules management
    • Audio streaming - 3 encoders (MP3, AAC, HE-AAC v1 & v2), compatible with all delivery servers (Icecast, Shoutcast 
    • v1 & V2, HLS, Flash, Wowza)
    • Link & Share - 100% of all parameters are accessible via the telnet protocol
    • Software Panels - the device allows you to create your own panels with unlimited functionality
    Quantity 2 stereo
    Level 2 ranges (+12 or +24 dBu - software selectable)
    Impedance 10 kΩ
    Connectors 1 pair of XLR female balanced, EMI suppressed; 
      1 pair on a DB25 female (TASCAM pinout) balanced, EMI suppressed
    Quantity 2 stereo
    Standard AES3
    Sampling Rate 32 to 192kHz, 24 bits
      1x XLR female balanced , EMI suppressed;
      1 on a DB25 female (TASCAM pinout) balanced, EMI suppressed
    AES/EBU Input Sync
    Quantity/Connector 1 on a DB25, EMI suppressed
    Sync Type Word Clock - 32 to 192 kHz
    Video PAL or NTSC
    Level 1 to 6 Volts
    Impedance 75 Ω
    SCA/RDS Input
    Quantity/Connector 2x BNC, EMI suppressed
    Type Adder
    Level Same as MPX output (adder)
    Impedance 75 Ω or 10 kΩ, jumper selectable
    Analog Output
    Quantity 2 stereo balanced (with automatic unbalancing)
    Level 2 ranges (+12 or + 24 dBu - software selectable)
    Load Impedance 10 kΩ typ. (> 300 Ω)
    Connectors 1 pair of XLR male balanced, EMI suppressed; 
      1 pair on a DB25 female (TASCAM pinout) balanced, EMI suppressed
    Digital Output
    Quantity 2 stereo
    Standard AES3
    Sampling Rate 32 to 192kHz, 24 bits
    Connectors 1x XLR male balanced, EMI suppressed; 
      1 on a DB25 female (TASCAM pinout) balanced, EMI suppressed
    Stereo Generator MPX Output
    Quantity/Connector 2x independent BNC, EMI suppressed
    Signal MPX or 19kHz pilot
    Level 2 ranges (+6 or +18dBu - software selectable)
    Load Impedance 75 Ω typ. (> 35 Ω)
    Audio Specifications
    Processing Delay MPX 30ms
    Processing Delay Analog Out (HD) 11ms
    Frequency Response MPX 30Hz - 15 kHz +/-0.2dB (de-emphasized)
    Frequency Response Analog Out (HD) 30Hz - 20 kHz +/-0.2dB
    Signal to Noise >90 dB
    Distortion MPX <0.018% THD
    Distortion Analog <0.006% THD
    Separation >70 dB
    Audio Over IP
    Live Protocol (AES67) Ethernet 100Mbps; 
      Compatible AES67, Ravenna, Livewire; 
      48kHz, 24 bits, stereo, >= 12 samples/packet (250µs), delay 1ms
    Transport protocol (IP) Ethernet 100Mbps; 
      High quality stereo codec (32 to 200kbps) or linear;
      2.5s compensation buffer
    Operating Conditions
    Operational between 0 – 50°C
    Size And Weight
    Dimensions (WxHxD) 485 x 44 x 260mm
    Shipping Weight 540 x 115 x 300 mm / 2.700 kg
    Power Supply
    Type Dual Redundant
    Voltage 100 – 260 Volt AC, < 40W
    Power Up Boot
    Boot time 3s
    Bypass Relay
    AES AES in => AES out
    Analog Analog in => Analog out
    Optional Interfaces
    USB 2.0, for upgrades
    micro SD card for music files
    RS232 DB25 standard, for RDS (shared with GPIO)
    GPS input For System time and AoIP Sync. SMA connector (active antenna)
    GPIO 8 inputs, 8 outputs (opto-isolated) with 5V supply (DB25 male)
    SOUND4 REMOTE CONTROL Software Operating Systems
    Linux Debian 32 & 64 bits
    Microsoft Windows 2 & 64 bits: Windows 7, Windows 8, Windows 10, Windows Server 2008 R2, Windows Server 2012
    Weight 1.6 Kg
    PC To Client Communication Interface
    TCP/IP Client (Remote) / Server (Impact) architecture via Ethernet 1000Mbps
    Link & Share All parameters are accessible via simple Telnet protocol
    SNMP Supervision with Trap Feature


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