Tag Archive for: multichannel

100 Things #60: Making Real-Time Measurements with Live Curves

Live curves is a new feature in SoundCheck that lets you combine multiple real-time measurements on the RTA and FFT with static curves on the same graph. This lets you compare RTA and FFT curves, as well as comparing either to a static curve. This has applications for live tuning, automotive, and ANC audio testing.

Make Real Time Measurements with Live Curves

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Learn more about Live Curves in SoundCheck. Information can be found in SoundCheck 21, 20, and 19 new features under RTA and FFT.


Video Script:

‘Live curves’ is a new feature in SoundCheck that lets you drag any real-time measurements from the RTA or Spectrum Analyzer to another graph, or similarly drag any static curve from another graph to the RTA or spectrum analyzer. This lets you compare any live measurement to a static curve, for example, for tuning an automotive cabin, or a headphone response to a target curve.

We introduced the multi-channel RTA back in version 19, and the multi-channel FFT Analyzer in version 21. Both these instruments let you display multiple spectra at once, and also perform calculations such as power summing of multiple sources, subtraction of one curve from another and curve averaging. You can even display both an FFT measurement and an RTA measurement side by side on the same instrument.

When a multi instrument is opened, a live curve is created in the memory list. A live curve is indicated with a green circle. Just like a static curve, you can drag a live curve into any XY display graph [short live shot], and you can also add  a static curve into a multi instrument display [short live shot].

Here I have a static target curve in a graphic display. I can drag my live RTA curve onto this graph. Then I can add low pass and high pass filters to my signal to better match the target curve.

This is incredibly powerful for real time tuning applications. Check it out for yourself! What would you tune using SoundCheck? Let us know in the comments!



100 Things #3: Multichannel Audio Test with up to 64 Channels Simultaneously

Multichannel audio test is simple in SoundCheck with up to 64 channels of simultaneous acquisition; in reality, your channel count is only limited by your hardware interfaces and computer processing speed. Both hardware and software channels can be added at any time after purchase, enabling your system to truly expand with your needs. In this short video, we demonstrate the flexibility of Listen’s multichannel setup, using multiple interfaces and driver types can be used in the same setup. We show simultaneous play and record on different devices, and introduce some of the features recently introduced for multichannel testing.

Multichannel Audio Test with up to 64 Channels Simultaneously

Learn More About Multichannel Audio Test in SoundCheck

Many additional multichannel features have been added in the past few versions of SoundCheck, including the multichannel FFT and RTA, multichannel signal generator and more. Check out the ‘What’s New in SoundCheck’ page for detailed information.

Learn more about AmpConnect 621, our newest multichannel audio interface.


Video Script: Multichannel Audio Test with up to 64 Channels Simultaneously

SoundCheck handles up to 64 channels of simultaneous acquisition. We’ve offered full multichannel acquisition with a steadily increasing number of channels since 2007, reaching 64 measurement channels in 2015! The reality is, that these days, your channel count is limited by your hardware interfaces and computer processing speed rather than the number of channels that can be configured in SoundCheck.

Listen’s multichannel setup is extremely flexible. SoundCheck can play and record simultaneously on different devices. Multiple Listen audio hardware or 3rd party interfaces can be used in the same test setup. You can even use devices with different driver types concurrently e.g. WDM, WASAPI, ASIO, Core Audio & NI DAQ.

The modularity of the SoundCheck platform means channels can be added at any time, so if your testing needs change after you purchase a system, it’s simple and cost-effective to increase your channel count and add interface hardware.

The software has also gained many new multichannel testing features in recent years. Back in 2012 we introduced batch processing to handle data from multiple channels simultaneously.

In 2019, we added the capability for SoundCheck to open multichannel WAV files into the memory list, signal generator and stimulus steps, conveniently auto-naming and grouping the channels together.

This year, we introduced our Multichannel RTA, which allows real time measurement and  viewing of multiple signal paths simultaneously to present a convenient view of  multiple signal paths across a wide range of applications. Settings such as signal path gain, octave band resolution, weighting, averaging and time-weighting can be set independently for each channel for complete measurement flexibility. The RTA also has a calculation module which allows the user to Power Average the spectra from two or more signal paths.

We also launched our own 6-in 2-out high resolution audio test interface, AmpConnect 621 which further simplifies multichannel measurements with TEDs compatible inputs, integrated amplifier and impedance measurements, and simple plug and play operation.

One thing that’s for sure… with today’s voice-activated devices, advanced headphones and hearables, automotive audio and more, multichannel testing is here to stay, and SoundCheck has all the functionality you need to implement multichannel tests across a wide range of devices at a cost effective price.






AmpConnect 621 Demo Video

In this short video, sales engineer Les Quindipan gives a brief overview and demonstration of the new AmpConnect 621 multichannel, high-resolution audio interface.