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NTi Audio Newsletter


23rd February 2010

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The new XL2 Audio and Acoustic Analyzer perfectly suits the challenging measurements in live sound, installed sound and environmental noise applications. The comprehensive range of measurement functions has been extended with new firmware V1.12. Besides wav-file logging the XL2 Analyzer now also offers voice note recording, a scope function, automated user calibration and many more features. All customers may upgrade their XL2s for free now.

The XL2 firmware 1.12 adds a variety of new features, which are especially advantageous for regulatory live sound or environmental noise monitoring applications. Now the XL2 Audio and Acoustic Analyzer records voice notes and wav-files for a complete documentation of the measured sound. All audio files and logged level data are available for upload to the computer. The recorded wav-files may then be replayed later, for instance to determine any predominant components of the sound source or to post process the stored measurement data.

Automated User Calibration
The NTi Audio measurement microphones M4260 and M2210 include an electronic data sheet, thus the XL2 recognizes the factory-entered sensitivity of these microphones automatically. The new XL2 features add an automated user calibration from an external precision sound calibrator. This allows accurate sensitivity verification before any sound level measurement. During the user calibration the XL2 writes the measured sensitivity additionally onto the electronic data sheet of the M4260 or M2210 itself, so all later measurements utilize the user sensitivity.

Scope with Auto Detect Function
The new scope function displays the wave form of the electrical input signal. It is extremely useful in all kinds of troubleshooting and service tasks, for instance allowing you to visually monitor the measured sine input signal. The scope auto-ranges to the proper scale and then triggers on the fundamental frequency automatically.

Further new XL2 features include an extended polarity measurement for subwoofers in the frequency range below 100 Hz, an automated FFT measurement reports generator, various additional sound level values, and a user defined limit indication for sound levels.

The XL2 firmware V1.12 is available at support.nti-audio.com/xl2 now.




You are welcome to meet NTi Audio at the following events:

24. - 27. March 2010
Pro Light & Sound
Frankfurt, Germany
Booth# Hall 8, F03

20. - 23. May 2010
PALM -Install China
Beijing, China



How to update the XL2


Connect the XL2 to the computer by USB. The XL2 appears as removable drive.


Download the firmware file “XL2Vxxx.xx” from the XL2 service website


Copy the firmware file to the XL2.


Remove the USB cable to restart the XL2. The XL2 displays “Updating Firmware” after a few seconds.


Wait a few minutes until the firmware update is completed and start working with the XL2.


The XL2 Audio and Acoustic Analyzer now records linear, high-resolution wav-files in 24 Bit / 48 kHz resolution with the optional Extended Acoustic Pack (EAP). At the same time the XL2 measures the sound levels of the monitored live sound or environmental noise, thus audio and level data are stored simultaneously on the Mini-SD-Card. This ideally suits acousticians for further post processing or detailed analysis on the computer.

The high-resolution wav-file recording of the XL2 Analyzer is especially an advantage for environmental noise monitoring. The XL2 logs the actual sound levels and also records the wav-file together on the Mini-SD-Card. All data may be quickly transferred to a third party wav-file editor or post processing software via the USB interface or directly from a card reader. The wav-file format is mono, 24 Bit resolution with 48 kHz sampling rate. The post processing with third party editing software on the computer allows removing segments of unwanted sound sources from the logged audio data and calculates the required sound level results. These post-processed results may be compared with the various simultaneously stored measurement results of the XL2 Analyzer. The XL2 logs all sound levels in A, C, Z weighting at once. Together with the optional Extended Acoustic Pack also the percentile statistics are available.

Live Sound monitoring with ADPCM Wav-files
For applications not requiring the linearity of 24 Bit / 48 kHz resolution, or where it is desirable to minimize file size, the basic XL2 Analyzer already generates ADPCM compressed wav-files. These are typically used for monitoring of live sound events or for violation logging in community sound measurements. For example suppose that an excessive sound level of 115 dBA has been measured at a live event, but perhaps this sound level has actually been caused by people shouting close to the measurement microphone: Examination of the recorded wav-file and logged test results from the XL2 Audio and Acoustic Analyzer will show that the actual normal sound level was below the maximum permitted sound level of e.g. 99 dBA throughout the event. The XL2 Analyzer generates all data for later verifications, thus simplifying monitoring of live sound events.

Read more about the XL2 ...

XL2 Audio and Acoustic Analyzer with M4260 Measurement Microphone

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