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]
WTD -62.48 -62.11 -50
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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