1. Willyman's Avatar
    Hi guys,

    Some hardcore audiophile data here. Measured the output of the Note 5 using AudioPrecision APx525. Some interesting facts and graphs below.

    Simply put: it's an audiophile's dream!

    • Supports high resolution playback up to 192 kHz. Also FLAC by the way.
    • Extremely flat frequency response: <0.03 dB delta upto 20 kHz, <0.35 dB delta upto 96 kHz
    • Very good dynamic range: 98 dB at max output level, 120dB at default output level
    • Relatively low output level: -8dBV into a 16 Ohm load (for reference, Asian iPhone 6 = -1 dBV)
    • Output impedance: 4.6 Ohm. May lead to coloration if you have a headphone with strong impedance swings.


    NOTE: all measurements done into a 16 Ohm load (standard headphone impedance).

    Graphs
    Relative output level in dB
    Note 5 - headphone jack audio performance measurements-note-5-relative-level.jpg

    THD+N spectrum
    Note 5 - headphone jack audio performance measurements-note-5-td-n-spectrum.jpg

    UPDATE
    I've done some more measurements to understand what the UHQ and Tube Amp Pro settings do. No surprises really, pure gimmicks in my opinion.

    (1) Tube Amp Pro

    Relative response level


    THD+N spectrum

    So, the Tube settings does 3 things:
    1. EQ the low end. Less sub and more low mid range.
    2. Add harmonic distortion in the low frequencies.
    3. Remove very high frequencies.


    Kind of expected for this kind of effect. I'll leave it up to your own subjective evaluation whether you want less bass and more distortion in your music :laugh:

    (2) UHQ
    I've only tested UHQ using an uncompressed file, but I think I know what it is trying to do.


    RED curve = no UHQ spectrum
    GREEN curve = UHQ spectrum

    When using a high res file, turning UHQ ON did nothing. When I used a file which only has content up to 20 kHz ... something did happen.
    It's clearly adding ultrasound content to the audio (i.e. content that was not originally there!). The test signal used here is an analytical multi tone signal. The measurement is normally very clean and sharp (see the red curve). The UHQ measurement shows (1) more distortion and (2) additional ultrasound harmonic content. The only reason I can imagine for adding this noise is to force the DAC to work in a higher sampling rate. I don't see the point to be honest, especially if it's being done by adding unnecessary noise and quite high levels of ultrasound harmonics.
    08-25-2015 11:04 PM
  2. oshogg's Avatar
    Wow awesome thanks for the measurements.. How about audio over bluetooth? Is it any better than on Note 4?

    Thanks,
    Osho

    Sent from my SM-N920T using Tapatalk
    08-25-2015 11:57 PM
  3. Willyman's Avatar
    Wow awesome thanks for the measurements.. How about audio over bluetooth? Is it any better than on Note 4?

    Thanks,
    Osho

    Sent from my SM-N920T using Tapatalk
    I don't have a Note-4 to compare. Personal experience with BT on this phone has been very positive.
    08-25-2015 11:59 PM
  4. oshogg's Avatar
    Ok.. Thanks, any suggestions for where I can get 24 bit 192kHz songs to play on Note 5? Thanks

    Osho

    Sent from my SM-N920T using Tapatalk
    08-26-2015 01:10 AM
  5. Willyman's Avatar
    HD tracks or ONKYO music store
    08-26-2015 01:30 AM
  6. shibosway's Avatar
    The advertised high quality audio output was a definite selling point for me. I actually spent several ours last night listening to a bunch of my music on my Grado SR80s and it's very pleasant. I've also decided that, as much as I don't like software audio enhancers on principle, that the UHQ upscaler is going to stay on pretty much all the time and that the Tube Amp simulator is kind of nice for less dense, well recorded tracks with good dynamic range i.e. a lot of my jazz and classical selections.

    Would you mind measuring again with the UHQ upscaler on. I'm curious as to what exactly it's doing to the sound because whether it's on my at home headphones, earbuds, or in the car it just sounds better to my ears.

    If only it pushed a little louder... I have some thirsty headphones.
    08-26-2015 02:22 AM
  7. Willyman's Avatar
    The advertised high quality audio output was a definite selling point for me. I actually spent several ours last night listening to a bunch of my music on my Grado SR80s and it's very pleasant. I've also decided that, as much as I don't like software audio enhancers on principle, that the UHQ upscaler is going to stay on pretty much all the time and that the Tube Amp simulator is kind of nice for less dense, well recorded tracks with good dynamic range i.e. a lot of my jazz and classical selections.

    Would you mind measuring again with the UHQ upscaler on. I'm curious as to what exactly it's doing to the sound because whether it's on my at home headphones, earbuds, or in the car it just sounds better to my ears.

    If only it pushed a little louder... I have some thirsty headphones.
    Sure, I can try. I don't think it will do anything for high res files. It might use upsampling to force the DAC to run in higher sampling rates (i.e. better filters).

    I've updated the output impedance measurement as well.
    08-26-2015 02:59 AM
  8. Willyman's Avatar
    UPDATE: added info and measurements about the UHQ and Tube Amp settings. Pure gimmicks. My advice: leave them off... It will not make your device sound better. But forget those features, the device sounds beautiful! Loving it.
    09-01-2015 01:35 AM
  9. MDMcAtee's Avatar
    Awesome information...

    Thanks for posting this.

    Posted from my Galaxy Note 5
    09-01-2015 02:34 AM
  10. Daniel Collignon's Avatar
    Hey man,

    I know this post is old but still. I was wondering whether you think PowerAMP is a beneficial app for my Note 5. I think it is but I would really like to know your opinion.

    And what do you think about the new earphones that Samsung shipped them with?

    Also, how is the audio quality through PowerAMP?

    Best regards,
    Daniel Collignon
    11-04-2015 10:27 AM
  11. Soylent_Green's Avatar
    This is interesting to read.
    11-04-2015 07:57 PM
  12. Willyman's Avatar
    Hey man,

    I know this post is old but still. I was wondering whether you think PowerAMP is a beneficial app for my Note 5. I think it is but I would really like to know your opinion.

    And what do you think about the new earphones that Samsung shipped them with?

    Also, how is the audio quality through PowerAMP?

    Best regards,
    Daniel Collignon
    There will be no difference in audio quality when using PowerAmp. If you prefer the UI than sure, go for it. Only differences (as far as I know) that can be obtained would be by using something like Viper4Android which changes the way your Android device will route audio. But that requires root and frankly, I don't really see the point except perhaps lower latency.

    So, in short, if you don't mind the UI, use the stock player.

    I've not tested the earphones yet. They're still in the box
    11-04-2015 09:18 PM
  13. Mark Valentine's Avatar
    If I only knew what half of everything you mentioned. I just plug in my over the ear headphones and just tweak with all the audio settings until I'm pleased. >.<
    11-04-2015 10:21 PM
  14. popeskill's Avatar
    What about adapt sound? I have some sennhieser hd598's and was wondering if using adapt sound will improve sound quality?
    01-20-2016 05:47 PM
  15. Devin Doucet's Avatar
    I don't have any testing equipment, just my ears. My ears tell me that the uhq makes my mp3's sound quite a bit better and the tube amp is a little better.
    01-20-2016 06:21 PM

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