Apple - iPod - MP3 Player
| LINDOS AUDIO SEQUENCE TEST | Apple - iPod - MP3 Player |
| SOURCE MS10 V3.0 | AL = -6dBu, EQ - flat, Vol - Full |
| 13-Mar-06 07:07 PM | TOLERANCE Lindos GradeB PASSED |
|
FREQUENCY RESPONSE [u] 0dB
| 20Hz | -0.37 | -0.50 | +3-6 |
| 31Hz | -0.12 | -0.12 | ±3 |
| 40Hz | 0.00 | 0.00 | ±2 |
| 50Hz | 0.00 | -0.12 | ±2 |
| 100Hz | 0.00 | 0.00 | ±2 |
| 315Hz | 0.00 | 0.00 | ±2 |
| 1k0 | 0.00 | 0.00 | ±2 |
| 6k3 | 0.00 | 0.00 | ±2 |
| 10k0 | -0.12 | -0.12 | ±2 |
| 12k5 | -0.12 | -0.12 | ±2 |
| 14k0 | -0.12 | -0.12 | ±3 |
| 16k0 | -0.12 | -0.12 | |
| 20k0 | -0.25 | -0.25 | |
| 25k0 | -14.87 | -14.75 | |
TEST LEVEL OUT 1kHz [t]
| TL dB | -08.76 | -08.72 | |
| DELms | | | |
NOISE ITU-468 Q-Pk REL [n]
PHASE R-L [z]
| 3k15 | 24.00 | | ±45 |
| 10k0 | 72.00 | | ±90 |
| 15k0 | 100.00 | | |
DIST RES 1kHz WTD REL [r]/q
| -20dB | -41.67 | -41.90 | -25 |
| 0dB | -61.39 | -61.23 | -30 |
| +8dB | -68.30 | -68.18 | -30 |
| +12dB | -70.62 | -70.12 | -30 |
| +15dB | -70.70 | -70.67 | -30 |
| +18dB | -39.29 | -53.21 | |
LEVEL VS LEVEL [h]
iPod Video tested using MS10 Sequence 3 and Segment h at -18dB FS with Noise shaping. Composite results sheet.
The iPod has a very good frequency response and noise and distortion performance. The iPod would pass Lindos Grade A were it a) not clipping on the +18dB distortion measurement and b) not giving a poor high frequency phase response (caused by their use of a single DAC (Digital to Analogue Convertor) - stardard cost saving measure across all MP3 players and only really an issue when both channels are being summed to provide a mono signal).
Note that the iPod almost has 18dB of headroom (EBU standard) above its maximum volume setting.
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