Transfer Measurements

Source Independence

Transfer Analyzer

Source Independent Transfer measurements allow to determine the frequency and phase response of an acoustical system in a very fast way. As source independent implies, there is no special test-signal like noise or a sine-sweep required to perform the measurement. Both a reference signal like the output of your mixing desk and a measurement signal from a microphone are fed into the Transfer Analyzer. By calculating autocorrelation spectrum and cross-correlation spectrum the frequency-response, phase and coherence are measured.

The advantage of this technology is that you can continue measurements during showtime - providing some important information, e.g. the changes that happened since you have finished soundcheck, or an idea of the sound in areas you can not listen to like on a balcony.

Coherence

LAMA will also display the coherence of the measurement, it can be interpreted as the quality of the measurement. It is in the nature of source-independent measurements that they can not always measure the whole spectrum - obviously it is not possible to achieve results in a frequency area where no reference signal is present. In this areas, the coherence will drop - indicating that no valid result is available. As someone is usually not interested in invalid results, LAMA will fade those areas out and not confuse the user with uninteresting data.

Multiple Traces

LAMA allows to display as many transfer functions as you like in a single window, making it possible to display the response of the room and your EQ function at the same time and compare them with a short view on your computer

Delay Finder

To analyze the frequency response, LAMA needs to know the delay between source and response signal. It is automatically measured with the integrated Delay Finder which is also able to display the impulse response of your system.