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The SOUND4 PULSE – 3-Band Sound Processor has advanced functionalities and impressive versatility, SOUND4 PULSE gives clients the ultimate price - performance ratio, providing much more than just a processor.


Flexible and powerful, it ensures perfect sound quality and full compatibility with radio broadcasting standards and can be used simultaneously for FM and HD, DAB, DRM or streaming.


One of the most distinctive features of the SOUND4 PULSE is the three-band processor which is at the heart of dynamic processing. A single algorithm guarantees the gain in each of the bands in order to complete sound stabilization. “Coloring” is controlled by the Fidelity parameter. Thus, it is possible to have a "purist" and a "colored" sound texture. The 3-band Process is achieved through the revolutionary algorithm S.I.S. (Sound Impact System), which makes it possible to maintain the authenticity of the original sound attacks.


Another great feature of this model is the intelligent 2-band Automatic Gain Control whose main purpose is to stabilize the input levels and prevent noticeable level differences between recent and old titles. This product also has a real stereo enhancer and a 3-band stereo image limiter acting on the control of the energy transmitted by the stereo sub-porter at 38 kHz. This unique functionality limits issues currently caused by the traditional enhancement processes. The stability of reception in areas "disturbed" by Multipath conditions is thus greatly optimized.


SOUND4 PULSE has Analog, Digital and AES-67/Livewire inputs and outputs, as well as an MPX FM output. The outputs of SOUND4 PULSE are fully assignable. For example, the analog output may replicate the signal which is fed to the analog input, the digital output delivers an HD signal, the TX1 one delivers the MPX signal and the TX2 output drives the 19-kHz pilot signal.


Due to the capacity of its memory card to store audio files, SOUND4 PULSE also guarantees bulletproof backup functionalities, ensuring continuity of the on-air program and solving the problem of radio silence.


Software Options Available *

A number of additional software options make this product even more versatile. 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. 


Additionally, it comes in a compact 1U case and has a dual power supply which is a standard feature of all SOUND4 In-box products and ensures constant, uninterrupted operation of the device. The user-friendly remote control interface allows for easy setup of the unit. One of the most impressive assets if this tool is the fact that it takes just seconds to upgrade the SOUND4 PULSE to a SOUND4 IMPACT via a software license. This is a product that will fully meet your requirements when it comes to both quality and price.


SOUND4 PULSE Audio Processor


    • Dual Power supply
    • 2 Processing path: FM & HD
    • Inputs: 2 AES/EBU 32 to 192 kHz, 2 analog, 2 AES-67/Livewire, 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, 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 PULSE: 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
    • 4-band EQ + Tone FX and Stereo FX
    • Stereo enhancer
    • 3-band process with Fidelity and Sound Impact System (S.I.S.)
    • 3-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: 12 ms
      • FM output: 25 ms
      • MPX output: 32 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, 3-band Process and 3-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
    • Preset Sharing - the ultimate solution to manage an unlimited number of processors. All of them are automatically updated if one of them is modified
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