Right Mark Audio Analyzer
Right Mark Audio Analyzer
RMAA has become a staple in most audio reviews, graphing to measured signal quality of the card. It should be understood that in these tests you are seeing the combined results of both the playback and recording sections.
Frequency Response
This graph shows the output signal characteristics of the X-Meridian 7.1 2G. The more linear the graphed line is the more transparent and neutral the cards audio output is. Variances in the graph would produce coloration in that particular frequency range producing output higher or lower than the remaining frequencies. The XM 2G soundcard produced excellent frequency response results providing a very flat response.
Notes on above Graph: We have noticed that RMAA has difficulty with scaling on the frequency axis when graphing multiple bit/depths and sample rates. The results are accurate when viewed on their own but the axis scaling is incorrect when comparing one to the others. We have contacted the RMAA authors and hopefully it will be fixed in upcoming revisions of this application.
Noise Level
The above graph shows the level of noise present in the cards output signal. There will always be some level of noise present in any audio device but in many cases the level is so low that it is not audible to the human ear. The XM 2G soundcard produced excellent noise measurements across the tested ranges.
Dynamic Range
This graph shows the card's operating range and the graphs illustrate the lowest and highest range the card is capable of producing accurately. The XM 2G shows an excellent dynamic range across the tested ranges.
THD + Noise (at -3 dB FS)
The above measurements illustrate how much Total Harmonic Distortion and Noise is present in the cards output signal. Harmonic distortion presents itself as multiple odd and/or even harmonic overtones in the original signal. The lower the measurements are preferred and the XM 2G produced excellent THD+N measurements across the test set.
Intermodulation Distortion
The above graph shows the measurement of IMD. This type of distortion results from multiple signals being mixed together and producing distortion in the form of overtones that are not harmonically linked to any of the base signals. Lower values are preferred for any type of distortion tests and the XM 2G produced excellent results through the test sets.
Cross Talk
This graph is a measurement of the bleed-through effect from one stereo channel to the other. The lower the measured crosstalk values are the less bleed through. In our test set the XM 2G produced exceptional results. Indeed results for most resolution are off the measured scale.
