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Why WinAudioMLS?
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Plug-ins

 

WinAudioMLS offers plug-ins for special applications. These plug-ins are not part of the standard package, but we offer them as an upgrade.

 

Since we offer many features for different areas, you might start first with your application to get an overview.

 

We also offer bundles for different applications with significant discount.

Measurement with amplifiers, soundcards, filters etc.
Room acoustics
Loudness measurement in sone

 

 

High dynamic

192kHz/24 Bit ASIO support
64-bit ultra high precision FFT

WinAudioMLS supports the DS2200 and the new Stingray (DS1M12) USB measurement card from  www.usb-instruments.com This allows an analog bandwidths of DC to 250kHz at 1MHz sample rate. more...

 

Quality checks for production tests

Automatic Production tests for Quality  checks more...

Automating WinAudioMLS with script engine

 

Room acoustics 

Objective speech transmission measurement with STI and RASTI according to IEC60268-16. This includes STI-PA/STIPA for IEC60849

Reverberation time with Chirp / MLS 

Special measurement modes

Multichannel extension with up to 64 channels simultanously more...

automatic directivity plots with automatic turntables from Outline. more

Frequency sweep (stepped sine)
Level sweep
Data logger

Steinberg VST plug-in support. WinAudioMLS can load VST effect plug-ins into the signal processing chain.  more

Speed analysis tool with applications far beyond the traditional wow&flutter analysis more...

Filter

Octave+1/3 octave analyzer with standardized frequencies
Filter designer let you create low-pass, high-pass, band-pass with arbitrary frequencies 
1/3 octave filter bank

RIAA  (and inverse) filter for both the Analyzer and the Signalgenerator. This plug-in is ideal for turntable and preamplifier measurements. You can also filter .wav files with it. 

1kHz digital notch filter

Loudness monitoring

LEQ Level Monitor for long-term analysis with arbitrary averaging time more...

Loudness measurements (sone) according to DIN 45631  ISO 532B

Determination of tonal components of noise and determination of a tone adjustment for the assessment of noise immissions according to DIN45681. more  

Visualization

3D real-time visualization. more info about 3D
The Vectorscope also known as a Goniometer is a powerful and widely used tool for monitoring stereo signals.

 

 Frequency sweep

With this plug-in you can easily do frequency sweeps. Applications are e.g. analysis of THD+N vs. frequency. WinaudioMLS controls the signal generator and measures the following parameters:

peak level and frequency
total level
THD+N 
THD
level of each harmonic individual (optional)

WinAudioMLS sets the generator to the desired frequencies. Then WinAudioMLS waits a user definable time, stores the measurement results and steps to the next frequency. You can enter the start and stop frequency, the number of steps and the time for each step. The stop frequency can be smaller than the stop frequency to create a negative sweep. 

 

 

The following picture is an example of such an frequency sweep.

 

 

The data is also stored in plain text files for further processing

 

Frequency sweep by www.dr-jordan-design.de
Sample rate=44100;  FFT length=1024
Average=1
Window type=Blackman; Weighting=none
Sweep time per step=700.0ms
DC filter off

track_freq.

peak [dB]

FFT_freq.

level[dB]

THDN[dB]

THD[dB]

1000.00

-39.63

990.5

-36.95

-18.59

-12.45

2000.00

-33.17

1981.0

-29.91

-20.41

.19.34

3000.00

-33.10

3014.6

-30.19

-22.34

-20.34

4000.00

-37.88

4005.1

-35.12

-11.34

-10.45

5000.00

-49.10

4995.7

-45.42

-15.94

-15.02

6000.00

-33.05

5995.0

-32.61

-12.03

-11.34

7000.00

-42.36

7019.8

-38.21

-17.65

-15.32

8000.00

-51.17

8010.3

-47.06

-16.97

-16.34

9000.00

-64.19

9000.8

-51.16

-19.43

-17.66

10000.00

-64.87

10192.3

-53.87

-22.99

-20.56

The data can be imported by e.g. Excel for further analysis. WinAudioMLS can also display the sweep results graphically.

 

 Level sweep

This plug-in is similar to the frequency sweep plug-in. Here you can define a level range, the number of steps and the step time. This sweep is useful to measure e.g. the dependency of the THD from the level of non-linear devices.

Please note that the level control works on the digital generator signal. If you use low levels, the noise and distortion are mostly caused by the generator itself.

 

Data logger

This plug-in is useful for doing long-term measurements or automatic (script based) measurements.

At an user definable time WinAudioMLS writes all real-time measurements to a file. This file is purely text based, so it can be imported to any other program easily. In conjunction with the octave or 1/3 octave analyzer you can log the spectrum.

1kHz notchfilter

This narrowband notch filter is dedicated for distortion analysis. The basic 1kHz tone is removed.

 

 

Octave analyzer for noise measurements

WinAudioMLS offers many option to measure noise within buildings. With WinAudioMLS you can measure the performance of attenuation elements or noise absorbers. The most important tool is the spectrum analyzer, which can be weighted with the 'A' or 'C' curve. With the dual channel functionality of the PRO EX version you can use different weighting factors for two microphones. Typical application is one microphone in the middle of the room and one in the corner. WinAudioMLS can be calibrated to measure absolute levels. 

For special applications we offer a module that is basically an octave analyzer according to  DIN10052. The center frequencies are standardized 63,125,250,500,1000,2000,4000 and 8000Hz. Each band owns a peak memory. The average time is adjustable from fractions of seconds to hours.

The data logger module allows long-term measurements within buildings. The following plot shows an octave log, drawn with Microsoft Excel.

 

1/3 octave analyzer   

If you require a higher resolution we offer a 1/3 octave analyzer. Each bar contains its value in a numeric form to read the values fast and precisely. Together with the data logger module you can perform long-term measurements with the higher resolution. 

 

Reverberation time   

The most important parameter for room acoustics is the reverberation time. It is defines to the time, when the signal level is below -60dB after switching off.
The reverberation time is measured with  MLS / Chirp  allowing significant better performance compared to impulse measurements.

You can find more information about room acoustic measurements here 

 

 

 

 

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Last modified: Mai 05, 2009