Sound & Vibration Instruments

dspInstrument SV4 - IoT Four Channel Sound & Vibration Measurement

The dspInstrument™ SV4 is a four-channel sound and vibration measurement system that includes an embedded computer (Raspberry RPi4) for processing. This allows the SV4 to function as either a standalone analyzer or alternatively, it can be a front end for larger distributed systems. Each input can be configured for either IEPE/CCP transducer support or operated in voltage mode. Individual gain settings of x1, x4, x16, and x64 accommodate a broad range a transducer sensitivities. 

The sampling rate is programmable in very fine steps. Channel 1 can operate with a sample rate as high as 262144 which is convenient for FFT bins.  Other common choices might be 204800 or 192000. Channels 2, 3 & 4 are decimated and operate at 1/4th the sample rate of Channel 1.  This configuration is ideal where a microphone would use Channel 1 and a triaxial accelerometer would use Channels 2, 3 & 4. It is also possible to operate the dspInstrument SV4 with all four channels sampling at half the maximum sample rate (131072). 

The dspInstrument SV4 is controlled by software running on the RPi4. Danville has supporting software that manages the operation of the front end electronics and streaming. Most customers will write their own applications.

As a standalone analyzer, you connect an external USB keyboard and a standard computer monitor. The power will likely be supplied from a 5V wall transformer. The SV4 is also an internet-of-things (IoT) device. It is optionally powered via a PoE+ ethernet connection. This allows data to be collected at many remote sites and processed at a central location.


Sampling Rate:

  • Maximum 262.144 kHz, programmable in 1 Hz steps

Audio Inputs:

  • Individual Programmable Gain Amplifiers x1, x4, x16, x64
  • Full Scale Voltage (x1 Gain) +/- 10 Vpk
  • Input Impedance 500KΩ
  • Low Frequency Cutoff < 0.1 Hz
  • Signal to Noise 123dBA

Digital Interfaces:

  • 1Gb Ethernet 
  • USB3 x 2
  • USB2 x 2
  • HDMI 


  • 129mm(W) x 34mm(H) x 165mm(D)

Power Requirements:

  • 5V-5A, 5.5/2.5 Coaxial Power Connector
  • Optional PoE+ (IEEE-802.3at)
    * PoE (IEEE-802.3af) is insufficient.


Ordering Information:


Standalone Analyzer Version

Internet-of-Things (IoT) Version


External 5V Power Supply Only

Power over Ethernet (PoE+)

Part Number:

P/N: A.06060B

P/N: A.06061B

Sound & Vibration Instruments

Danville makes a variety of Sound and Vibration instruments. Most of these are custom products that we designed and manufacture for a specific customer. One outcome of this product development is that we now have a large knowledge base that allows us to design new products with much less risk and effort than if we were starting from scratch. We took this one step further with the dspInstrument™ product family.

Our S&V Instrument family is a collection of semi-custom instruments that can be tailored for the specific needs of your audio interfacing & signal processing applications or acoustic & vibration measurement systems. While these measurement instruments are primarily targeted for these applications, they are well suited for many small quality control systems and test cells, audio signal processing, signal conditioning, and test generators.

A majority of S&V Instruments start from a specific customer requirement. However, Danville Signal has many pretested circuits and existing PCB layouts, all of which fit into a standardized enclosure. Building on pre-existing hardware and software allows us to facilitate the design process quickly and efficiently. In essence, Danville Signal can create a S&V Instrument to meet your specific needs without the cost of a full custom design, and in a much shorter time-frame.

You can get some dspInstrument application ideas from dspinstrument Example Front and Back Panels

Sometimes, an S&V Instrument product has enough of a broad market appeal that we offer a standard commercial-off-the-shelf (COTS) product.  The spDAQ is a great example. It is a two-channel, USB-powered front end for sound & vibration measurements.  Another example is our SV4 instrument. This is an Internet-of-Things (IoT) 4-channel sound and vibration analyzer that can be used both remotely and as a standalone analyzer.

Danville engineers are available to discuss your semi-custom and standard S&V instrument requirements. Want to learn more? Let's start a conversation.


dspInstrument spDAQ - 2 Channel Sound & Vibration Instrument

The dspInstrument spDAQ™ is a 2 channel USB bus-powered data acquisition front end optimized for sound and vibration measurements. It has industry-leading signal/noise performance and distortion performance since it relies on state-of-the-art audio data converters. However, unlike audio soundcards, each input and output level is stable and calibrated for accurate measurements. The sampling rate can be as high as 192k.

Each audio input can supply IEPE/CCP biasing for direct support of measurement microphones, accelerometers, and hydrophones.  There is also a TEDS interface that can read and write to these sensors. Alternatively, you can configure each input for standard voltage measurements. Since transducer sensitivity varies, the input gain can be selected as x1, x4, x16, and x64. Each of these settings is individually calibrated.

The audio output has 1 channel available on the front panel for convenience but is also available as two channels on the back panel. 

There are three channels of opto-isolated inputs and three channels opto-isolated outputs available for QC applications. For example, the outputs might be used as an Exceed Upper Limit, Pass, Below Lower Limit indicator. 

The dspInstrument spDAQ is intended to be used with a host computer using USB3 as a power source. From the host computer point of view, the dspInstrument spDAQ looks like a USB Audio Class 2 sound card. An external Windows application and DLL manages the special control settings for level, input mode, calibration, and other settings. This Windows DLL allows you to integrate control settings seamlessly into your custom application. The UAC2 driver supports both Windows Multimedia Extensions (MME) and ASIO (Steinberg Audio Stream Input/Output).


Sampling Rate:

  • 192k, 176.4k, 96k, 88.2k, 48k, 44.1k

Audio Inputs:

  • Programmable Gain Amplifiers x1, x4, x16, x64
  • Full Scale Voltage (x1 Gain) +/-10 Vpk
  • Input Impedance 1 MΩ
  • Connectors: BNC
  • IEPE/CCP Power (4ma)
  • Frequency Response < +/-0.1 dB (10 Hz – 90 kHz)
  • Low Frequency cutoff < 2 Hz (-3dB)

Audio Outputs:

  • Full Scale Voltage +/- 1.414Vpk (1Vrms)
  • Connectors: BNC (Mono), 3.5mm Phone (Stereo)

Digital I/O:

  • RJ45 - Wired similar to Ethernet TIA568B
  • Opto-Isolated Inputs
    • In 0 C Pin 1 (Orange/White)
    • In 0 E Pin 2 (Orange)
    • In 1 C Pin 3 (Green/White)
    • In 2 E Pin 4 (Blue)
    • In 2 C Pin 5 (Blue/White)
    • In 1 E Pin 6 (Green)
    • 5V Pin 7 (Brown/White)
    • Ground Pin 8 (Brown)
  • Opto-Isolated Outputs
    • Out 0 C Pin 1 (Orange/White)
    • Out 0 E Pin 2 (Orange)
    • Out 1 C Pin 3 (Green/White)
    • Out 2 E Pin 4 (Blue)
    • Out 2 C; Pin 5 (Blue/White)
    • Out 1 E Pin 6 (Green)
    • 5V Pin 7 (Brown/White)
    • Ground Pin 8 (Brown)

Computer Interface:

  • USB3 B Receptacle
  • USB3 B to A Cable (required for sufficient current handling)
  • USB Windows Driver , DLL and Control Application (supplied)

Power Consumption:

  • 700mA

Ordering Information:




2 Audio Inputs / 2 Audio Outputs 

Part Number:

P/N: A.06043G