Right Mark Audio Testing

Right Mark Audio Testing

RMAA has become a staple in audio reviews and while the results reflect our attempt to be as accurate as possible your test results may vary based on many variables. In past reviews we would use a loop-back test to provide the results however, many times this can provide incorrect results as the ADC on the given card influences the results and if the cards playback section surpasses the recording section the results will be limited and will not show the accurate abilities of the card. To get the most accurate results, the Home Theater HD 7.1 was connected to a recording card with an ADC which can properly illustrate what the card has to offer.  Below are the test results from this setup.
Frequency Response
This graph shows the output signal characteristics of the Home Theater 7.1.  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 HTHD produced excellent frequency response results.

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 Auzentech HTHD 7.1 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 Auzentech Home Theater 7.1 shows an excellent dynamic range across all the tested ranges.

THD + Noise (at -3 dB FS)
This measurement indicates 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 measurement the better and the HTHD 7.1 produced very good THD+N measurements across the test set.

Intermodulation Distortion
This 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 measurements are definitely preferred for any type of distortion measurements. The lower the measurement the better and the HTHD 7.1 produced excellent results through our test sets.

Stereo Crosstalk
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. On our measured graph, at 24bit 96,196 the crosstalk cannot be measured in the lower frequencies although in the higher range they elevate up a little. The Auzentech HTHD 7.1 produced excellent measurements for stereo crosstalk across our test set.