| Test | SigmaTel Audio | Audigy NX |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.38, -0.78 | +0.03, -0.17 |
| Noise level, dB (A): | -93.8 | -93.0 |
| Dynamic range, dB (A): | 93.6 | 91.4 |
| THD, %: | 0.0042 | 0.0046 |
| IMD + Noise, %: | 0.084 | 0.010 |
| Stereo crosstalk, dB: | -85.5 | -82.1 |