SE

Digital Portable Audio

The audio measurements below illustrate how accurately the various players reproduce the initial/recorded waveform. These devices are tested with both real music and technical signals. Waveform degradation is measured with the Difference level parameter, Df (in decibels). This shows how significantly the final studio mix is altered as a result of the playback device. A low Df level (blue area) implies less deterioration of the sound.

Measurements for each digital audio player (DAP) are presented as slides, with each showing Df levels for a dozen technical signals and two hours of music [SE test set "Variety"]. If a player has multiple modes of operation (for example, balanced/single-ended, high/low gain, DAC filter type, etc.), then its df-slide corresponds to the settings that provide the most accurate playback; the particular settings are listed on the slide under the player name (see Notes).

How to read df-slides [beta]. How we measure df levels [soon]. What is df-metric.

From a listener perspective, the most meaningful/helpful value on the df-slides is the histogram median, which correlates well with perceived sound quality. The diagram below summarizes the histogram medians for all DAPs tested so far:

<------------ Higher playback accuracy

Df Scale

Apple

-39.6
 iPad Air
-36.2
 A1749

Astell&Kern

-43.4
 SP2000
-34.3
 SA700

Chord

-73.7
 DAVE
-72.2
 Hugo 2

FiiO

-70.7
 M7
-57.4
 M3 Pro

Hidizs

-39.1
 AP80 Pro

LG

-71.3
 V60
-68.9
 V35
-47.5
 V30

Lotoo

-37.7
 PAW Gold Touch

Questyle

-40.4
 QP2R

Shanling

-57.5
 M0
-48.2
 M8

Sony

-69.4
 NW-A105
-67.2
 NW-WM1Z

 

Df-slides below are sorted by histogram median. Top df-slides represent portable players with higher playback accuracy.

Audio measurements of Chord DAVE
Chord Dave: not portable but a good high anchor for the portable players.

up to summary ^

Df-slide with audio measurements of Chord Hugo 2

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Df-slide with audio measurements of LG V60

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Df-slide with audio measurements of FiiO M7

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Df-slide with audio measurements of Sony NW-A105

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Df-slide with audio measurements of LG V35

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Df-slide with audio measurements of Sony NW-WM1Z

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Df-slide with audio measurements of Shanling M0

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Df-slide with audio measurements of FiiO M3 Pro

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Df-slide with audio measurements of Shanling M8

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Df-slide with audio measurements of LG V30

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Df-slide with audio measurements of Astell&Kern SP2000

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Df-slide with audio measurements of Questyle QP2R

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Df-slide with audio measurements of Apple iPad Air

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Df-slide with audio measurements of Hidizs AP80 Pro

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Df-slide with audio measurements of Lotoo PAW Gold Touch

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Df-slide with audio measurements of Apple Lightning to 3.5mm Headphone Jack Adapter

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Df-slide with audio measurements of Astell&Kern SA700

 

Note(1) Anti-aliasing filters tend to have the largest effect on playback accuracy. In most cases, a filter frequency response with a sharp roll-off will provide better results.

Note(2) Balanced outputs tend to have higher output impedance than single-ended outputs (double usually), but otherwise exhibit very similar playback accuracy (+/-1 dB).

Note(3) High/low gain modes typically provide the same level of accuracy, however, note that all measurements are performed at the same output level regardless (150 mV into a static 32 Ohm load).

Note(4) Additional df-slides for these DAPs (different settings and modes) can be found on the HypetheSonics website - https://www.hypethesonics.com/dapti-database/

Screen of Fame

These innovative and highly-revealing audio measurements became possible thanks to Paul and Maurice from hypethesonics.com and support from audio enthusiasts like you. We plan 100+ devices to test.

Feel free to create NFTs for the df-slides above. These slides are unique collectibles of pixel art showing the first public practical application of the new and open source audio metric - df-metric. By tokenizing df-slides you will help to preserve these measurements non-altered.

If you’re able to consider donating, please, specify which player you would like to see in the database. You can also design a personal plate (64x64px) for the screen below. Thank you!

Anonymous

Anonymous
0.84175 mBTC
($10)
2020.08.16

King of tekken

King of tekken
33450 RUB
($458)
2020.09.10

Vital Bazarov

Vital Bazarov
300 LE
($19)
2020.09.13

Anonymous

Anonymous
$500
2021.02.01

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