Tag Archive for: virtual instruments

100 Things #48: SoundCheck Supports Unlimited Virtual Instruments

SoundCheck introduced the concept of virtual audio analysis instruments to the world in 1997, and has continued to expand and develop their functionality since then. It supports an unlimited number of virtual instruments, including signal generators, multimeters, multi-channel RTAs and spectrum analyzers, and more. The use of multiple instruments simultaneously is demonstrated in this short video.

Unlimited Virtual Instruments in SoundCheck

Learn More About SoundCheck’s VIs

Check out our easy-to-follow tutorials on virtual instruments. (in the Acquisition section)

Watch our video on how to save time with virtual instrument configuration.

More information is also available in the SoundCheck Manual.

 

Video Script: SoundCheck Supports Unlimited Virtual Instruments

Since 1997, SoundCheck has supported the use of software virtual instruments, also known as VI’s. VI’s are software versions of hardware bench tools like signal generators, multimeters, spectrum analyzers, etc. They’re used for taking a quick measurement in SoundCheck, or in combination with SoundCheck’s sequence editor in a virtual instrument acquisition step. Most importantly, VIs can replace the need for dedicated hardware instruments which can be bulky and expensive. This is particularly useful if you need to travel with your audio test setup.

For  quick measurements or signal tests in SoundCheck, you may only need to open 1 or 2 VIs at a time. However, did you know that SoundCheck supports unlimited VIs? This is useful if you need  to perform multichannel or complex test applications.  For example, in this  setup, I’m  using multiple signal generators to playback noise to a multi-speaker simulated background noise environment. I can open as many signal generators as needed. I can also simultaneously monitor input as well.

Here’s I’m using multiple reference mics in a 6 mic array for making automotive measurements. I have 6 separate multimeters averaging input from each mic source, but I can also monitor the same input via the multi-RTA and even power sum the sources. Multichannel virtual instruments, such as the RTA, let  you view multiple sources in a single VI graph, saving screen real estate and allowing additional graph operations to be implemented in real time.

With unlimited VIs in SoundCheck, there’s no limit to what you can do. Try it for yourself.

 

 

100 Things #40: Synchronize Multiple Signal Generators

SoundCheck’s signal generator is a virtual instrument for playing signals (frequency, white or pink noise, .wav files or .wfms) out of any signal path in SoundCheck. But did you know that multiple signal generators can be used simultaneously in SoundCheck and even synchronized or delay offset, both in a sequence and for offline measurements. In this short video, we explain why this is useful.

Synchronizing Multiple Signal Generators in SoundCheck

Learn More About SoundCheck’s Signal Generator and other Virtual Instruments

Check out our seminar on SoundCheck’s Virtual Instruments.

 

Video Script: Synchronize Multiple Signal Generators

SoundCheck’s signal generator is a virtual instrument for playing signals (frequency, white or pink noise, .wav files or .wfms) out of any signal path in SoundCheck. But did you know that multiple signal generators can be used simultaneously in SoundCheck and even synchronized or delay offset, both in a sequence and for offline measurements. This has many audio test applications, let’s take a look…

When more than one signal generator is opened, a sync checkbox is available. When more than one signal generator is synchronized, the signal generators with the checkbox checked, will be phase-locked to each other and when clicking Play on one signal generator, all signal generators will start playing simultaneously . This might be useful, for example, when playing back a binaural or multi-channel recorded wav file that requires synchronization and needs to be analyzed in parallel with the multi-channel Real Time Analyzer.

It can also be used, for example,  to play back pink noise to the left and right ears of a headphone, using the RTA to monitor the spectrum of the left and right ear simulators . You might perform this test, prior to running a full headphone test sequence to assure equal level balance and a tight seal on the left and right ears

While the Signal Generator defaults to sample accurate playback, with SoundCheck 20 or later, you can set delays between signal generator destinations, to make sure signals from different generators are not in phase or are playing in a sequenced manner. For example, maybe you want to simulate a background noise environment by playing back a .wav file to multiple background noise speakers. You can target up to 64 simultaneous channels with different Signal Generators each with its individual configuration. We even have an ETSI ES 202 396-1 background noise generation test sequence available to save setup time if you need to do these types of tests .

As you can see, multiple signal generators have a whole host of applications ranging from synchronized headphone tests to background noise generation and sequenced playback. For more information, ask your sales engineer for a demo.

 

100 Things #36: Using Virtual Instruments for Greater Acquisition Flexibility

Virtual Instruments in SoundCheck are a quick and easy way to take a measurement without developing a full test sequence, for example to check a level in the multimeter or view an FFT spectrum in the Spectrum Analyzer. They also offer amazing versatility when used in a test sequence to acquire data for further analysis, post-processing, etc. Watch this short video to learn more.

Using Virtual Instruments in SoundCheck

Learn More About SoundCheck’s VIs

Check out our easy-to-follow tutorials on virtual instruments. (in the Acquisition section)

Watch our video on how to save time with virtual instrument configuration.

Check out our seminar on SoundCheck’s Virtual Instruments.

 

Video Script: Quick Measurements with Virtual Instruments

Virtual Instruments in SoundCheck are a quick and easy way to take a measurement without developing a full test sequence. This might be useful if, for example, you want to check a level in the multimeter or view an FFT spectrum in the Spectrum Analyzer. And, all of the measurements in SoundCheck meters can be saved to SoundCheck’s memory list.

However, did you also know that SoundCheck instruments can be used in a test sequence? A Virtual Instrument acquisition step can be created to acquire from a device you want to measure. This adds yet another way in SoundCheck to acquire data for further analysis, post-processing, etc.

You can even use multiple Instruments manually or in a virtual instrument acquisition step. Here’s an example of a virtual instrument acquisition step that acquires input from the reference mic and calculates the level and RTA spectrum [show screen capture of sequence]. Once acquired, the data can be processed like any other data in SoundCheck. For example, the level or RTA spectrum can be passed through a pass/fail limits step. This might be useful for measuring input-only noise, for example: fan noise from your product.

In this example, you can use a signal generator and mult-RTA in a Virtual Instrument acquisition to measure the individual channel of a 6-mic array along with the power sum of the 6 channels [screen capture of sequence]. The acquired data is captured to the curves tab of the memory list.

As you see, integrating virtual instruments as a step in SoundCheck is very easy, and another example of SoundCheck’s testing flexibility.

 

 

24: Instrument Highlights (working from home with SoundCheck)

Anastassia Tolpygo demonstrates some neat features of virtual instruments that you may not have seen before. These enable you to make a quick distortion measurements, accurately measure frequencies at very high resolution, and plot and save curves over time using just the virtual instruments without the need for a sequence step.