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This device has some advantages and some disadvantages.
• It does not work with all sampling frequencies. It is strongly recommended that you use one of these: 44100, 22050, 11025, 8000 or 4000 Hz. Do NOT use 48000.
• The input level mixer cannot be controlled by WinMLS.
• To measure accurate system delay, you need to use the WinMLS loop-back feature, else you can get several milliseconds error.
• It is not powered by the USB or batteries, thus not so portable.
• A 0.1 dB gain difference on the channels was reported.
• WinMLS is able to override the windows mixer, but setting the input level slider in WinMLS does not give any effect. The input level cannot be set from software. The microphone input levels can be set using an external know. This is dangerous for calibrated measurements and it is therefore recommended that you calibrate the level using a calibrator before you start a new measurement series.
• It handles very high input levels (+ 22dBu at the line input). This is a jack input where a mono jack must be used. Note that it does not handle a balanced signal.
• Line out can deliver more than +20 dBu and the THD is about 0.001 %
• It has built in phantom power and can handle very high input levels.
• The output mixer can be calibrated.
• A sampling frequency as low as 4000 Hz can be set which is a good thing for low frequency measurements.
• Not able to get 24 bits mode to work with WinMLS.
Note that if you are going to use it for 2 channel measurements, it is not simple to measure the correct initial time delay (time of flight).
We have seen that if the output mixer is controlled by WinMLS, the volume is not always set back to what it was before WinMLS performed measurements.
First, you must set the control panel to MME as shown below
Note that it might be set back to ASIO so you may have to set it back to MME.
You can click the 
icon found on the taskbar.
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