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Virtins Technology

Name: Virtins Technology
Address: 6 Tao Ching Road, #03/12, Singapore, 618723, SG
Telephone: +6562580357

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Virtins Technology

Virtins Technology specializes in PC-based virtual test & measurement instruments as well as control systems, such as USB oscilloscopes, signal generators.

Virtins Technology was established in 2004, specializing in PC-based virtual test and measurement instruments as well as control systems. We have quickly gained our reputation since the launch of our first product - Multi-Instrument, a PC based multi-function virtual instrument software. Multi-Instrument has been installed on hundreds of thousands of computers all over the world due to its support

for sound cards, the very basic ADC and DAC device in almost every computer, as well as its try-before-you-buy feature. Powered by Multi-Instrument, our subsequent virtual instrument products, such as real time audio analyzers, oscilloscopes, spectrum analyzers, signal generators, data loggers, dynamic signal analyzers, have been well- recognized worldwide for their versatile functionality, high performance and quality as well as user-friendly operability. Our products have been used in many applications covering a wide range of industries. We are proud that MIT, Stanford Univ., Penn. State Univ., North Illinois Univ., Boeing, Los Alamos National Lab, Dolby Lab, Logitech, GE (China) R&D Center, Thales Group, Lockheed Martin Unmanned Integrated Systems, Tsinghua Univ., Agilent (China), and many other global R&D-intensive agencies and companies use our products. We also provide custom software and hardware design and development to suit the specific needs of various industries. At Virtins Technology, we encourage, appreciate and adopt new and innovative ideas and technologies, in order to provide the most cost-effective solutions to our customers. We are committed to providing state-of-the-art yet affordable PC-based virtual instrument products with the highest quality and unmatchable technical support.

03/11/2025

Multi-Instrument 3.9.16 has been released. This update introduces support for the Underwater Sound Analyzers USA-168C, USA-268A, and USA-268B, along with new playback features such as a playback cursor, pause function, and on-the-fly playback speed adjustment for the Play and Cyclic Play buttons, which are particularly useful for locating specific sound events by listening in ultrasound applications.

The USA-168C complements our existing models, USA-168A and USA-168B, by featuring a modular design. The hydrophone in USA-168C is designed to connect directly to a standard 3.5 mm microphone jack that supplies Plug-in Power (PIP). With the supplied PIP-to-XLR adapter, it can also be connected to a standard XLR microphone jack that provides phantom power. The latter is the default configuration, and a USB sound card with an XLR microphone input is included in the standard package. The hydrophone in USA-168C is panel-mountable via its M10 thread or can be used in free-hanging applications when fitted with the supplied weight instead.

USA-268A and USA-268B feature an exceptionally flat frequency response (typically within ±2 dB) from 9 Hz to 92 kHz, which is much wider than that of USA-168 series. The former is assembled with a weight and designed for free-hanging applications, while the latter is intended for panel-mounted applications. The XLR-to-USB audio interface used in both models employs two ADCs working in tandem to create a single 32-bit float output data stream. One “low-gain” ADC is optimized for high-level signals, while the other “high-gain” ADC is optimized for low-level signals. This state-of-the-art dual-ADC architecture delivers an unmatched dynamic range compared with conventional single-ADC designs, allowing the capture of underwater sounds at low levels with high fidelity and at high levels without clipping — all without the need for manual analog gain adjustment.

For more information, visit:
https://www.virtins.com/audio-and-acoustic-analyzers/VT-USA-168AB.html
https://www.virtins.com/audio-and-acoustic-analyzers/VT-USA-268AB.html

22/04/2025

Multi-Instrument 3.9.14 Released

The following new features have been added:

1. A “f1 Notch” option has been introduced in [Spectrum Analyzer Processing] to define the bandwidth used for fundamental power calculation, in accordance with the AES17-2015 standard notch filtering method for THD and THD+N measurements.

2. SUB (Subroutine), RTN (Return), and SOI (Synchronize Output with Input) instructions have been added to the Device Test Plan.

3. SetSignalGeneratorDCoffsets() function has been added to the ActiveX Automation API.

4. An enhanced GetDDP() function in the ActiveX Automation API now reads the DDP Viewer value along with the High-High, High, Low, and Low-Low limits.

With the existing SIO (Synchronize Input with Output) instruction in the Device Test Plan, the Signal Generator operates in “Loop” (continuous) output mode — starting before data acquisition and stopping afterwards. This ensures the acquisition captures the stabilized portion of the stimulus.

In contrast, the newly added SOI instruction allows the Signal Generator to run in non-“Loop” (single-shot) output mode, enabling precise control over the generated signal length, including very short bursts below 1ms. In this mode, the Oscilloscope is armed first, with trigger parameters set to respond only to the leading edge of the generated signal, preventing false triggers from background noise.

The video below demonstrates a running device test plan where a 1 ms sinewave burst was generated and captured by the Oscilloscope with a 2 ms frame width. The sinewave burst swept linearly from 10 kHz to 500 kHz in 50 steps, and the RMS value vs. Frequency was plotted. The device test plan here consists of only 6 lines of scripts. This time-domain windowing method is commonly used to isolate the arrival of direct sound or ultrasound before echoes occur.

09/12/2024

Multi-Instrument 3.9.13 has been released with several new features and enhancements. These include two new instructions for reading from and writing to a MIDI device in the Device Test Plan, refined high-precision RIAA frequency compensation and frequency response files, expanded support for various CSV text file formats in [File]>[Import] and the WFL & BPL waveform libraries in the Signal Generator, and two new mapping options, Average and MinMax, for data-to-screen rendering.

When the number of data points far exceeds the screen's horizontal resolution, the "Display one data point per vertical raster line" option can be used to speed up screen rendering. The software now offers three mapping methods: Interpolation (also known as uniform downsampling), Average, and MinMax. The latter two are newly introduced in this version. As shown in the figure below, the MinMax method best preserves the envelope of the original data and is now set as the default option in the software.

06/11/2024

32-bit 1 kHz sinewave digitally generated using the MultiTone function in Multi-Instrument, with no spectral leakage.

13/10/2024

Multi-Instrument 3.9.12 has been released. The most exciting new feature is the capability to measure sound intensity. Sound intensity is the time-averaged rate at which sound energy is transmitted through a unit area perpendicular to a specified direction at a given point in space. It is equal to the time averaged product of sound pressure (p) and acoustic particle velocity (u) in the specified direction. The SI unit of sound intensity is W/m^2. In contrast to sound pressure, which is a scalar quantity and has only magnitude, sound intensity is a vector quantity, possessing both magnitude and direction. Sound intensity measurement is useful for determination of sound power, identification and ranking of sound sources, visualization of sound fields, measurement of transmission loss, identification of transmission paths, etc. The sound power of a source can be determined from sound pressure measurement, but only if the source is placed in a carefully controlled environment, such as an anechoic or reverberant chamber, where special assumptions about the sound field can be made. In contrast, sound intensity measurement allows for in-situ determination of sound power in any sound field, even in the presence of strong steady background noise from other sources. Sound intensity measurement is sensitive to phase mismatch between the two channels. Multi-Instrument supports calibration and correction of phase mismatch to further improve measurement accuracy.

The following two pictures show simultaneous measurements of sound intensity and sound pressure using the well-known P-P method (i.e., the microphone pair method) and a typical P-P sound intensity probe (IEPE-SIP-8450, https://www.virtins.com/accessories/accessories-IEPE-sensors.html -Microphones). The sound intensity probe can also be used to measure sound levels even below the
microphone’s thermal noise by using the cross-correlation averaging algorithm provided in Multi-Instrument.

02/09/2024

We have just published a white paper on Software Methods for Non-Linear Distortion Compensation and Noise Reduction in Measurements. It can be viewed at:
https://www.virtins.com/doc/Software-Methods-for-Non-Linear-Distortion-Compensation-And-Noise-Reduction-In-Measurements.pdf

17/08/2024

Multi-Instrument 3.9.11 has just been released. New functions include the calculation of noise rating and noise criterion values for noise level assessment in indoor environments, the generation of the multitone configuration file for non-linear distortion compensation, and dual-channel cross power spectrum vector averaging for uncorrelated noise reduction.

The lowest non-linear distortion and noise level measurable by a system is always constrained by the system's own residual non-linear distortion and noise floor. While improving the system hardware seems to be the only option, there are software methods to compensate for distortion and reduce noise. The following two screenshots show the THD loopback tests of an audio analyzer before and after applying these software techniques. It can be observed that the residual THD+N and THD drop from 0.00028% and 0.00011% to 0.00008% and 0.00004%, respectively, representing improvements of 10.9dB and 8.8dB. Additionally, the noise level is reduced from -115dBFS to -126dBFS after 800 averages, an 11dB improvement. Other noise-related parameters, including SNR and SINAD, all show pronounced improvement.

12/06/2024

MI 3.9.10 has just been released. New features include skewness and kurtosis calculation, frequency weighting configurations for whole-body vibration and hand-arm vibration in accordance with ISO 2631-1, 2631-2, 2631-4, and 5349-1, and sample device test plans for transfer function and vector impedance measurement with an auto-ranging algorithm from 1 Hz to 50 MHz using VT DSO-2A20E.

Skewness and kurtosis are the third and fourth normalized central moments of the amplitude distribution of a signal, respectively. Skewness measures the asymmetry of the probability distribution about its mean, while kurtosis measures the 'tailedness' of the probability distribution. These metrics complement traditional metrics such as the mean and standard deviation in characterizing the signal. They are particularly useful in some vibration analysis applications. For example, the Vibration Dose Value (VDV) can be derived from kurtosis. The mean is the first raw moment, representing the DC component of the signal. The standard deviation is the square root of the second central moment. When the mean value is zero, the standard deviation is equivalent to the RMS value, representing the energy of the signal.

Picture 1 shows the various frequency weighting curves for whole-body vibration and hand-arm vibration.

Picture 2 shows the skewness and kurtosis of a sine wave is 0 and 1.5, respectively.

Picture 3 shows the skewness and kurtosis of a uniformly distributed white noise is about 0 and 1.8, respectively.

16/05/2024

We have just published a white paper on frequency weightings for sound and vibration perceived by humans using Multi-Instrument. It can be viewed at:https://www.virtins.com/doc/Frequency-Weightings-for-Sound-and-Vibration-Perceived-by-Humans-using-Multi-Instrument.pdf

25/01/2024

We have just published a white paper on mechanical shock testing with Multi-Instrument - Classical Shock Pulses and Shock Response Spectrum. It can be viewed at: https://www.virtins.com/doc/Shock-Testing-with-Multi-Instrument-Classical-Shock-Pulses-and-Shock-Response-Spectrum.pdf.

14/11/2023

Virtins Technology has launched the world’s first PC-based 32-bit-float real-time acoustic analyzers: VT RTA-268A/B/C. This RTA series is powered by the comprehensive virtual instrument software, Multi-Instrument®. The USB audio interface used has two ADCs working in tandem to create a single output data stream in 32-bit float format. One “low gain” ADC is optimized for high-level signals, and the other “high gain” ADC is optimized for low-level signals. This state of the art dual-ADC architecture provides unmatchable dynamic range compared with the conventional single ADC approach.

With a proper Class 1 measurement microphone, it is now possible to capture sound across the entire human hearing range without sacrificing fidelity at low signal levels or encountering clipping at high signal levels, and this is achieved without the hassle of manual analog gain adjustment and measurement range switching at all.

Furthermore, The USB audio interface features a built-in mixer-level loopback switch, which can be utilized as a time reference for convenient time delay measurements. The second picture below shows an example of live music broadcast latency measurement using Generalized Cross Correlation with the convenience of this loopback switch. More information can be found at: http://www.virtins.com/VT-RTA-268ABC.shtml

28/09/2023

We have just published a test report on the ZOOM UAC-232 with a focus on its 32-bit float mode, a revolutionary new feature in the audio industry. The report uncovers some of its inner workings and secrets for the first time. It can be viewed at:https://www.virtins.com/doc/ZOOM-UAC-232-Test-Report-using-Multi-Instrument.pdf

The following two screenshots shows the noise level (A-weighted) and overall linearity graph of ZOOM UAC-232.

Address

6 Tao Ching Road, #03/12
Singapore
618723

Opening Hours

Monday	09:00 - 17:00
Tuesday	09:00 - 17:00
Wednesday	09:00 - 17:00
Thursday	09:00 - 17:00
Friday	09:00 - 17:00
Saturday	09:00 - 17:00

Telephone

+6562580357

Website

http://www.virtins.com/

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