| 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): | -95.6 | -99.1 |
| Dynamic range, dB (A): | 94.9 | 98.8 |
| THD, %: | 0.0047 | 0.0052 |
| IMD + Noise, %: | 0.083 | 0.0084 |
| Stereo crosstalk, dB: | -85.2 | -82.2 |