| PATH |
The frequency response of the sound circuits, not including the microphone and speakers, is within plus or minus 1 dB from 20 Hz to 20 kHz.
Total harmonic distortion plus noise (THD+N) as a percentage of full scale are shown in Table 3-6.
| Connector and level | THD+N |
| Line input | 0.03% |
| Line output, open circuit | 0.03% |
| Headphone jack, open circuit | 0.03% |
| Headphone jack, 32-ohm headphones | 0.5% |
The signal-to-noise ratios (SNR) for various inputs and outputs are shown in Table 3-7. The values shown are unweighted; values with A weighting would be about 8 dB higher.
| Connector | Signal-to-noise ratio |
| Microphone | 65 dB |
| Line output | 85 dB |
| Headphone jacks | 85 dB |
| Line input | 85 dB |
| Internal CD or DVD | 85 dB |