My First Digital Audio Player

One of the facts which people have been aware of for several decades now, is that we can buy a portable player, specifically for MP3 files, and that if we do, the sound quality will not be so great.

But in more recent years, Digital Audio Players have emerged on the consumer market, that promise lossless playback of high-fidelity sound, the last part of which is just referred to as “High Resolution Sound” by now. This lossless playback-capability does not come, when we listen to MP3-Files with them, but rather, if we actually play back FLAC, or ALAC -Files.

I just bought This sort of device, which is a Fiio X1 II. One of the remarkable facts about this device is, that its Digital-Analog conversion can run at up to 192kHz, and it sports the possibility of 32-bit sound. What I assume in such a case is, that even if I was to listen to a 48kHz -sampled audio file, 4-factor oversampling would in fact take place, because the D/A converter would continue to run at 192kHz, and I’d also assume that the analog filter would stay as-is, with a cutoff-frequency around 20kHz. But because I am in fact listening to 44.1kHz -sampled sound, I also assume that the whole D/A converter is being slowed down to 176.4kHz. ( :1 )

I have this working with My recently-purchased headphones, and am listening to a mix of MP3, OGG and FLAC -compressed music. I would say that this combination has significantly better sound, than the sound-chip in my Samsung Galaxy S6 phone does. ( :2 )

When I received this DAP, it had firmware version 1.6 already installed. But, I updated the firmware to the latest, v1.7… In fact, formatting the SD card with ‘exFAT’, as well as applying the firmware update, worked easily for me, even from Linux computers. The SD Card is a Sony.

My only regret is, that I personally, don’t have the manual dexterity which would have been needed to install the supplied screen-protector properly. I had the presence of mind to pull it back off, when it did not align correctly, and to dispose of the screen-protector. So I can expect some scuff-marks in the future. :-)

Happy, with Music,

Dirk

(Updated 07/09/2018, 14h55 … )

1: )

I would also assume, that out of the advertized ’32-bits’, the Least Significant 8 Bits are not accurate, when the signal-level is high enough, to be expressed as a 32-bit amplitude. Often, the public statement of having anything over 24 bits is an exaggeration.

OTOH, I think that modern technology has a good chance of achieving 16 bits of precision, at 192kHz, going From digital To analog.

2: )

Just having listened to both my Samsung S6 phone and my DAP again today, I would estimate that although the S6 does reproduce the high-frequency sounds at correct amplitudes, it also adds a small amount of distortion to them, which makes it difficult to discern multiple frequencies, simultaneously above 10kHz. But what I find helps with this DAP, is that when it does reproduce those high frequencies, they are undistorted.

 

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