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Audio quality of OnePlus 6

Recording of SE test sequences, played back by OnePlus 6 smartphone

Figure 1. Recording of SE test sequences, played back by OnePlus 6 smartphone. Standard SE test sequence includes 10 test signals and two hours of music material.

 

Thanks to Kostya, who has shared his OnePlus 6 smartphone for testing, we have its objective audio measurements, preformed in accordance with SE df-metric:

Df-slide showing location of various test signals (including 2 hours of music) on Df scale according to their levels of degradation

Figure 2. Df-slide showing location of various test signals (including 2 hours of music) on Df scale according to their levels of degradation. Artifact signature of OnePlus 6 is similar to the one of Apple portable devices. Df-slides of various players can be compared to each other on the Portable players page.

 

Conclusion:

Audio quality of OnePlus 6 is in line with top smartphones, including Apple iPhones. They all sound similar, at least with 32 Ohm headphones.


 

Appendix

 

1. Diffrograms of 35 tracks of the test set “Variety”, played back through OnePlus 6 smartphone. They show level of waveform degradation of the musical signal divided into 400ms chunks (one pixel each). Median Df values of the tracks are indicated. Click a track to open in full size for quick comparison with similar tracks from another device. More about diffrograms → Diffrogram: visualization of signal differences in audio research.

All-off
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
OnePlus6 - Variety - 1 OnePlus6 - Variety - 2 OnePlus6 - Variety - 3 OnePlus6 - Variety - 4 OnePlus6 - Variety - 5 OnePlus6 - Variety - 6 OnePlus6 - Variety - 7 OnePlus6 - Variety - 8 OnePlus6 - Variety - 9 OnePlus6 - Variety - 10 OnePlus6 - Variety - 11 OnePlus6 - Variety - 12 OnePlus6 - Variety - 13 OnePlus6 - Variety - 14 OnePlus6 - Variety - 15 OnePlus6 - Variety - 16 OnePlus6 - Variety - 17 OnePlus6 - Variety - 18 OnePlus6 - Variety - 19 OnePlus6 - Variety - 20 OnePlus6 - Variety - 21 OnePlus6 - Variety - 22 OnePlus6 - Variety - 23 OnePlus6 - Variety - 24 OnePlus6 - Variety - 25 OnePlus6 - Variety - 26 OnePlus6 - Variety - 27 OnePlus6 - Variety - 28 OnePlus6 - Variety - 29 OnePlus6 - Variety - 30 OnePlus6 - Variety - 31 OnePlus6 - Variety - 32 OnePlus6 - Variety - 33 OnePlus6 - Variety - 34 OnePlus6 - Variety - 35
-30.1 -25.1 -25.2 -32.9 -26.3 -26.7 -31.7 -24.6 -23.8 -23.5 -27.6 -22.9 -23.0 -27.6 -35.4 -26.0 -29.2 -25.2 -32.9 -37.8 -31.4 -23.4 -25.0 -21.3 -27.2 -26.8 -23.7 -20.6 -26.6 -26.0 -25.7 -20.8 -34.1 -25.5 -28.2

 

 

2. Dendrogram of similarity of artifact signatures for the portable players.

Dendrogram showing similarity of artifact signatures of tested players

Figure 7. Dendrogram showing similarity of artifact signatures of tested players. The shorter the link between two players, the more similar their artifact signatures.

 

 

Table 1. Underlying matrix of Spearman distances between artifact signatures for the dendrogramm. The Spearman distance = 0.1 is critical for relation of Df measurements to subjective scores. For the players that have similar artifact signatures (distance < 0.1) their perceived sound quality correlates well to df-measurements performed with substantial amount of real-life music material (histogram medians).
     (1)    (2)    (3)    (4)    (5)    (6)    (7)    (8)
 (1) Apple iPad mini 2
(2) HTC Desire C
(3) HTC Desire C (ba)
(4) Shanling M2s
(5) Shanling M2s (HighGain)
(6) Shanling M2s (gradual)
(7) Apple A1749 adapter
(8) OnePlus 6
        0.0619 0.0972 0.0445 0.0446 0.0334 0.0374 0.0111
0.0619        0.0655 0.0149 0.0147 0.0174 0.1494 0.1029
0.0972 0.0655        0.0651 0.0651 0.0660 0.1710 0.1306
0.0445 0.0149 0.0651        0.0002 0.0024 0.1378 0.0887
0.0446 0.0147 0.0651 0.0002        0.0025 0.1379 0.0888
0.0334 0.0174 0.0660 0.0024 0.0025        0.1229 0.0752
0.0374 0.1494 0.1710 0.1378 0.1379 0.1229        0.0095
0.0111 0.1029 0.1306 0.0887 0.0888 0.0752 0.0095        

 

 

 

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