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Multi-Instrument Download Multi-Instrument Now!(Download 21-day fully functional FREE trial)        Brochure     Manual

Multi-Instrument Add-on Modules

Multi-Instrument License Upgrade

The license information in the softkey, hardkey and VT hardware are all remotely upgradable.
USB Hardkey for Multi-Instrument Series
Free Express Shipping

It does not need a driver to run and thus is hassle free. It will be initialized to the license level purchased. With this option, you can run the software on the registered computer with the softkey, and on any computer with the hardkey.
Full Package = Pro + all add-on modules, FREE upgrade for the same license level for life!
License Options: 1) Softkey activated license (locks to the registered computer)       2)VT hardware activated license (locks to the purchased VT hardware)
Optionally, a USB hardkey (locks to the hardkey) can be purchased per softkey or VT hardware activated license

1. Introduction
Multi-Instrument is a powerful multi-function virtual instrument software. It is a professional tool for time, frequency, time-frequency and modulation domain analyses. It supports a variety of hardware ranging from sound cards which are available in almost all computers to proprietary ADC and DAC hardware such as NI DAQmx cards, VT DSOs, VT RTAs and so on.  It consists of the following instruments and functions.

Sound Card Oscilloscope, Spectrum Analyzer, Signal Generator
Digital Oscilloscope
Transient Recorder
Data Recorder
Lissajous Plot
Digital Filters
Persistence Mode
Equivalent Time Sampling
AM, FM, PM Demodulator
Reverberation Analysis
Speech Intelligibility
Step Response Analysis 

Signal Generator
Function Generator
Arbitrary Generator
Burst Generator
White Noise Generator
Pink Noise Generator
MultiTone Generator
MLS Generator
Musical Scale Generator
DTMF Generator
Frequency Sweep
Amplitude Sweep
Fade In/Fade Out
AM, FM, PM Modulator
DDS & Streaming Modes
DC Offset supported

Voltmeter, SPL Meter,
Frequency Counter, RPM Meter
Counter, Duty Cycle Meter
F/V Meter, Pulse Width

Derived Data Curves
Energy Time Curves
Step Response Curve
Frequency Time Curves
X-Y Plots
Shock Response Spectrum
Spectrum Analyzer
Amplitude Spectrum Analyzer
Power Spectrum Analyzer
Real Time Analyzer
Octave Analyzer
Phase Spectrum Analyzer
Correlation Analyzer
Freq. Response Measurement
Distortion Analyzer
Noise Analyzer
Harmonics Analyzer
Dynamic Signal Analyzer
Coherence Measurement
Transfer Function Measurement
Impulse Response Measurement
Wow & Flutter Measurement
Sound Quality Measurement
Impedance Analyzer

Spectrum 3D Plot
Waterfall Plot
Cumulative Spectral Decay

Displacement, Velocity, Acceleration

Data Logger
8×8 Derived Data Point Logger
230 Derived Data Points
16 User Defined Data Points

Device Test Plan
User Defined Plan
8 X-Y Plots
1 Test Report
LCR Meter
Inductor Meter
Capacitor Meter
Resistor Meter
Impedance Meter

Derived Data Point (DDP) Viewer
Display Derived Data Points
HH, H, L, LL Alarming
User Defined Data Points
DDP Array Viewer

Software Customization & Development
Most Flexible Configuration
ActiveX Automation Supported
vtDAQ & vtDAO Open Interfaces
VC++, VB, VC#, Python, LabVIEWE sample codes

System Requirement
Windows XP/VISTA/7/8/10/11, 32 or 64 bit, screen resolution 1024×600 or higher.

ADC/DAC Hardware supported
8/16/24/32 bit Windows compatible sound card (MME/ASIO driver)
NI DAQmx compatible cards
VT DSO F1/H1/H2/H3 series
VT DAQ 1/2 series, VT DAO 1 series

Language supported
English, French, German, Italian, Spanish, Portuguese, Russian
Simplified Chinese, Traditional, Chinese, Japanese, Korean ...

FREE upgrade for the same license level for life!

2. Function Allocation in Different License Levels

A complete Multi-Instrument software package consists of basic and add-on modules with all features in each of them. The basic modules include Oscilloscope, Spectrum Analyzer, Signal Generator, Multimeter, Derived Data Point Viewer, Derived Data Curve, and General Functions.  The add-on modules include Spectrum 3D Plot, Data Logger, LCR Meter, Device Test Plan, Vibrometer, and Dedicated Hardware Support.

There are six license levels to access the basic modules: Sound Card Oscilloscope, Sound Card Spectrum Analyzer, Sound Card Signal Generator, Multi-Instrument Lite, Multi-Instrument Standard, and Multi-Instrument Pro.  The add-on modules need to be purchased separately. They can only run with Multi-Instrument Lite, Standard, or Pro, except that Vibrometer can only run with Multi-Instrument Standard or Pro.  The following table shows the function allocation among different license levels.  Please note that a license of Multi-Instrument Full Package contains Multi-Instrument Pro and all add-on modules.

                                       Basic Modules               Legend: ✔- Function available            *- Function available in Multi-Instrument Full Package only 

Sound Card Oscilloscope

Sound Card Spectrum Analyzer

Sound Card Signal Generator

Multi-Instrument Lite

Multi-Instrument Standard


Multi-Instrument Pro







General Functions
ADC/DAC Hardware Sound Card MME
Sound Card ASIO          
Other Hardware      
vtDAQ, vtDAO software development License automatically activated with the presence of the corresponding hardware, e.g. a USB hardkey or a VT DSO.
File Operation Load WAV file
Load TXT file        
Load WAV file frame by frame (for long WAV file)        
Combine WAV file
Extract data and save them into a new WAV file
Save/load panel setting
Data Export Copy Text to Clipboard
Copy BMP to Clipboard
Print Preview
Export as TXT file
Export as BMP file
Trigger Settings Trigger Mode  
Trigger Source  
Trigger Edge  
Trigger Level  
Trigger Delay  
High Frequency Rejection  
Noise Rejection  
Sampling Settings Sampling Rate
Sampling Channels
Sampling Bit Resolution
Record Length  
Calibration Input  
Sound Pressure Level  
F/V Conversion        
Latency for Sync. Output/Input          
Sensor Sensitivity  
Load Factor for Power Calculation  
Graph Operation Zoom
Cursor Reader
Chart Type
Line Width
Fast/Slow Display Mode
Refresh Delay
Font Size
Roll Mode
Reference Curve & Limits        
Others Gain Adjustment
Input Peak Indicator
Sound Card Selection
Sampling Parameter Auto Setting
Multilingual GUIs
Show/Hide Toolbar
Lock/Unlock Panel Setting
Hot Panel Setting Toolbar
ActiveX Automation Server
Auto Ranging
Auto Scaling  
Input Channel Operation  
Type Individual Waveform ✔ (offline)
Waveform Addition ✔ (offline)
Waveform Subtraction  ✔ (offline)
Waveform Multiplication (offline)
Lissajous Pattern ✔ (offline)
Inter-Frame Processing Linear Average        
Exponential Average        
Intra-Frame Time Delay Removal        
Digital Filtering
(Intra-Frame Processing)
Remove DC        
FFT Low Pass
FFT High Pass        
FFT Band Pass        
FFT Band Stop        
FFT Frequency Response        
FIR Low Pass        
FIR High Pass        
FIR Band Pass        
FIR Band Stop        
FIR Frequency Response        
IIR Coefficients        
Parameter Measurement Reverberation / Speech Intelligibility          
Step Response Analysis          
Echo           *
Damping Ratio           *
Others Max, Min, Mean, RMS ✔ (offline)
Record Mode        
Persistence Display Mode  
Equivalent Time Sampling Mode  
Analog & Digital Signal Mixed Display      
SINC Interpolation
Spectrum Analyzer
Type Amplitude Spectrum / Power Spectrum Density / Impedance Spectrum    
Phase Spectrum    
(Linear / Circular)
(Linear / Circular)
(Original / Generalized)
Transfer function/Impedance Analyzer          
Impulse Response          
Intra-Frame Processing Frequency Compensation    
Frequency Weighting    
Remove DC    
Smoothing via Moving Average    
Inter-Frame Processing Peak Hold    
Linear Averaging    
Exponential Average    
Parameter Measurement THD, THD+N, SNR, SINAD, Noise Level, ENOB    
Harmonics & Phase    
Energy in User Defined Frequency Bands    
Peaks, SFDR, TD+N    
Wow & Flutter           *
Sound Loudness
Sound Loudness Level          
Sound Sharpness          
Sound Articulation Index          
Total Non-Coherent Distortion + Noise          
GedLee Metric          
FFT FFT Size 128~32768    
FFT Size 65536~4194034          
Intra-Frame Average    
Window Function    
Window Overlap    
Other Octave Analysis (1/1, 1/3, 1/6, 1/12, 1/24, 1/48, 1/96)    
Linear / Log Scale for X and Y    
Peak Marker / Label    
Signal Generator
Waveform Sine    
Saw Tooth    
White Noise    
Pink Noise    
Arbitrary Waveform    
Musical Scale    
Wave File        
Play Waveform in Oscilloscope
Cyclic Play Waveform in Oscilloscope
Sweep Frequency Sweep  (Linear/Log)    
Amplitude Sweep  (Linear/Log)    
Forward + Reverse Sweep    
Burst (Mask) Normal Phase    
Locked Phase    
Window-Shaped Burst    
On/Off Amplitude Ratio    
 Fade Fade In    
Fade Out    
 Modulation AM    
Others Software Loopback  (all channels)    
Software Loopback  (1 channel)      
Sync. with Oscilloscope          
Save as WAV file    
Save as TXT file    
DC Offset      
Type RMS        
Frequency Counter      
Duty Cycle        
Cycle RMS        
Cycle Mean        
Pulse Width        
Jitter Statistics           ✔ 
Settings Counter Trigger Hysteresis      
Counter Trigger Level      
Frequency Divider      
DDP (Derived Data Point) Viewer
Function DDP & UDDP Display          
HH, H, L, LL Alarm      
Set Display Precision      
Define UDDP      
Alarm Sound      
Alarm Acknowledge      
Linear/Exponential Averge      
DDP Array Viewer Harmonic Frequencies, RMS, Phases Report      
Octave Bands, RMS, Report      
Peak Frequencies, RMS, Phases Report      
Frequency Bands, RMS Report      
Reverberation / Speech Intelligibility (1/1 Octave)      
Reverberation / Speech Intelligibility (1/3 Octave)      
Derived Data Curve (DDC)
Function Energy Time Curve
Energy Time Curve
Energy Time Curve
Impulse Response Schroeder Integration Curve      
Step Response Curve
(via Impulse Response Integration)
Frequency Time Curve (Demodulated)
X-Y Plot      
Shock Response Spectrum      
Frequency Time Curve (Timed)      
RPM Time Curve      

                                        Add-on Modules                        Legend:   Blank - Function available if purchased        Shaded Blank - Function NOT available in that license level
Functions\Levels Sound Card Oscilloscope Sound Card Spectrum Analyzer Sound Card Signal Generator Multi-Instrument Lite Multi-Instrument Standard Multi-Instrument Pro
Spectrum 3D Plot   (US$99.95)
Type Waterfall Plot
(Inter-frame, STFT)
Waterfall Plot
(Intra-frame, STFT)
Waterfall Plot
(Intra-frame, CSD)
(Inter-frame, STFT)
(Intra-frame, STFT)
(Intra-frame, CSD)
Settings Spectrogram Color Palette            
Waterfall Color Palette            
Waterfall Tilt Angle            
Waterfall / Spectrogram Height            
Linear / Log Scale for X and Y            
Number of Spectral Profiles
Others 3D Cursor Reader
Octave Analysis
(1/1, 1/3, 1/6, 1/12, 1/24, 1/48, 1/96)
Spectrogram Smoothing
Data Logger  (US$99.95)
Real Time Logging            
Load historical log file            
Three logging methods            
262 derived data points available for logging            
Up to 8 × 8 = 64 variables can be logged simultaneously            
LCR Meter  (US$99.95)
High Impedance Measurement            
Low Impedance Measurement            
Up to 8 X-Y Plots (Linear/Log)            
Device Test Plan  (US$99.95)
25 Instructions            
Create / Edit / Lock / Execute / Load / Save a Device Test Plan            
Up to 8 X-Y Plots (Linear/Log)            
Device Test Plan Log            
Automatic Multi-Step Generation            
User Log In/ Out            
Volatile & Non-volatile Variables            
Vibrometer (US$99.95)
RMS, Peak/PP, Crest Factor for acceleration, velocity, displacement   (in Multimeter)            
Waveform conversion among acceleration, velocity and displacement (in Oscilloscope)            
SI/English units            
Dedicated Hardware Support (US$99.95)
RTX6001 Remote /Local Control            

The Dedicated Hardware Support add-on module is intended for seamless integration with some third-party hardware devices. The following third-party hardware devices are under this category:

RTX6001 Audio Analyzer
Note that without this add-on module, RTX6001 will work as a sound card only and is still supported by Multi-Instrument’s generic sound card drivers. With this add-on module, the input and output data will be scaled properly by the software without calibration, and RTX6001 is fully controllable from PC.

3. Module Specifications and Features

Sound Card Oscilloscope

Sound Card Spectrum Analyzer
Spectrum Analyzer

Sound Card Signal Generator
Signal Generator


Spectrum 3D Plot 
Spectrum 3D Plot

Data Logger
Data Logger

LCR Meter
LCR Meter

Device Test Plan
Device Test Plan


DDP Viewer 
DDP Viewer


Multi-Instrument API


4. Sound Card Based Measurement System
With the Multi-Instrument softare, without any additional ADC and DAC hardware, you can turn your PC into a multi-function test and measurement instrument by using its built-in sound card as the ADC and DAC devices. The sampling rate can be up to768 kHz and the sampling bit resolution can be up to 24 bits. The software have a wealth of features normally only found in much more expensive instruments. Generally, the sound card supplied with a PC is sufficient to allow measurements in the audio frequency range. Perfect measurement quality can be archived by using a professional grade sound card. Together with the VIRTINS Sound Card Oscilloscope Probe P601, which has three attenuation positions, the setup is able to measure a signal with a magnitude from as low as 1 µV to 24 V.

You can also integrate sensors, transducers, ADC and DAC hardware (e.g. sound cards, NI DAQmx cards, VT DSOs, VT RTAs, etc.), computers and the Multi-Instrument software together to form a professional test and measurement system.

5. Accessories for Sound Card Based Measurements

Please refer to VIRTINS Sound Card Oscilloscope Probe Kits P601PC and P601PPC

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