| 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): | -96.7 | -99.2 |
| Dynamic range, dB (A): | 96.5 | 99.0 |
| THD, %: | 0.0043 | 0.0059 |
| IMD + Noise, %: | 0.074 | 0.0075 |
| Stereo crosstalk, dB: | -85.9 | -82.2 |