Probably Mid gain will work, just check the little M R meters on the main screen for the levels. To set up for this, select Mic / Line on the Reference source page, and run an output from the sound system that is a mono mix of the audio going out to the room into the Line Input jack. In this case, you can use the actual sound from the event as the reference signal. You may be in a situation, such as during a live sound event, when it is not possible to run pink noise. Note that pink noise will only run when either the Delay Finder is on, or when the measurement is running. Turn on or off the pink noise using the sine wave icon on the main screen. Then just run a cable from the Line Output / Headphones jack to your system input. We are assuming that you will be using a microphone, so in both cases you would have the mic plugged into the XLR input, as the Measure source.įor pink noise, on the Transfer Function Setup page, select Ref Source, and on the top, select Mic/Gen. IAudioInterface2 is designed to work as an input device for Transfer function. Using Transfer Function with iAudioInterface2 Continue to the other steps described below, including setting the delay, to get accurate results. You should start to get results at this time. Next, start the Transfer Function running, using the Play/Pause button on the toolbar.
#Phase coherence meter generator#
Now open the generator panel by tapping the sine wave icon, select pink noise, and turn the generator on. Plug in the iTestMic or iPrecisionMic first, and then plug in the output cable. Next, make sure that the output cable is the last thing that you plug into the iOS device. Selecting the wrong mode will result in attenuated low frequency readings. If you are wiring to a balanced connector, like an XLR or 1/4″ TRS, make sure you select “balanced” for the generator output. If you are using 2 RCA connectors, make sure you select “mono” for the generator output. The other end of the cable might be 2 RCA connectors, or it could be wired to an XLR or 1/4″ TRS plug. If the plug has 4 conductors, the iOS device will turn off the built-in mic and look for a mic on that cable. To do this, you will need to use a cable that has an 1/8″ TRS 3-conductor plug on the end that plugs into the iOS device. In this case, you have to use the signal generator to make the reference signal. Transfer Function can be used with a single-channel input device, such as the built-in iOS device microphone, iTestMic, or iPrecisionMic. Using Transfer Function With A SIngle-Channel Input Device You can also use other two-channel interfaces, such as the original iAudioInterface or many of the generic 2-channel audio interfaces that work with iOS. iAudioInterface2 was designed specifically with Transfer Function in mind, since it includes a microphone input, and a second line input for the reference signal. Transfer Function is by definition a dual-channel measurement, and so to use it you need to either use a two-channel input device, or you will use the signal generator as the reference signal.
LARSA – Loudspeaker And Room System Analyzer.
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