[Asus ZenFone Max Pro M1  Guides, News, & Discussio] m00nlighter:
Hi guys,

I'll start with a disclaimer.

I. This guide is as simple as I can make it. If you are unable to follow these ten simple steps—please do not ask me any questions here or via PM, 'cause I'm not going to answer them. I have no time to waste on helping the IQ challenged.

II. This guide is for Neutron Music Player (hereafter NMP) only. I don't know or care how to enable Hi-Res audio support in any other player.

III. This guide is for Oreo only. If anyone can provide audioflinger dumps for Pie—and please don't ask me how to do it, see above—I'll check them and update this guide.

IV. This guide is for those who use WIRED gear. Last time I checked Hi-Res was NOT working for speaker/bluetooth. The root cause(s) may be Qualcomm's WCD9335 codec or engineering 'talent' at Asus or both. Again, I don't care.

V. This guide is for the stock ROM only. If you use a custom ROM—you are on your own, I don't know or care if the Hi-Res audio is supported there.

VI. If you have dirt cheap gear you don't even need Hi-Res audio 'cause you won't be able to hear the difference anyway. I'd say that the baseline is something like olde golde Sennheiser CX300-II or Creative EP630 (plus FLAC or any other lossless format supported by NMP).

VII. If you listen to lossy music files like MP3s—well they will be played louder and somewhat clearer, but don't expect wonders.

VIII. If you use Viper or Sauron or any other audio mod—you're on your own. Viper will not work for sure, as for other mods—I don't know or care. Have I written that before? Good, it won't hurt to repeat that again :)

Now let's rock!

1. If you don't have NMP, install it, add your music, etc, then CONNECT YOUR WIRED GEAR.

2. There are some prerequisites related to NMP settings, see the official NMP FAQ for Hi-Res Audio available at

http://neutronmp.com/forum/viewtopic.php?f=3&t=4014

3. In SETTINGS, enable 64-Bit Processing.

4. SETTINGS→Audio Hardware→Generic Driver: enable BOTH Hi-Res Codec (Direct PCM) and Custom Format. DO NOT ENABLE Hi-Res Speaker or Hi-Res Bluetooth.

5. Open Custom Format by tapping the gear button.

6. Set Format to "24-bit Int" and confirm by tapping the checkmark button . ALL THE OTHER FORMATS MUST BE DISABLED.

7. Set Frequency to "352800" (preferable) OR "384000" and confirm by tapping the checkmark button . ALL THE OTHER FREQUENCIES MUST BE DISABLED.

8. Set Mode to "DIRECT" and confirm by tapping the checkmark button . ALL THE OTHER MODES MUST BE DISABLED.

9. Tap the checkmark button several times to go back to SETTINGS, then Android's own back button to get to the player UI.

10. You're all set, enjoy your music in Hi-Res!

PS If you don't believe that Hi-Res audio support can be enabled by following this guide—check the two attached files. These files contain audioflinger dumps for 352800 Hz and 38400 Hz resampling frequencies, made on a rooted ZB602KL device with the v340 stock ROM.

Again, don't ask me any questions. Uncle Google is your friend.

If you STILL don't believe that Hi-Res audio support can be enabled by following this guide—check these links.

Yes these tests are in Russian, so you're welcome to use Google Translate if you don't know Russian :)

https://reference-audio-analyzer.pro/review-report.php?id=1691&page=asus-zenfone-max-pro-m1

https://reference-audio-analyzer.pro/title-report.php?id=1691&page=asus-zenfone-max-pro-m1