Which Eversolo do you have? I was quite impressed by how Eversolo A6 ME was improved by upgrading the power supply to Beatechnik LHY linear PS. Try listening with some decent audio chain to this well-recorded video:
To be more complete, Amazon Music HD is not bit perfect *automatically." If you are a dedicated audio nut, you sit there and manually change the Windows mixer bit/sample rate to match those of Amazon music file's original bit/sample rate...EVERY time next song turns out to have different bit/sample rate than last.
If every track on an album is labeled "Ultra HD", they all have the same bit/sample rate. That's been my experience, anyway.To be more complete, Amazon Music HD is not bit perfect *automatically." If you are a dedicated audio nut, you sit there and manually change the Windows mixer bit/sample rate to match those of Amazon music file's original bit/sample rate...EVERY time next song turns out to have different bit/sample rate than last.
Hate Amazon for that..
There are regular complaints that that’s not always the case though with Amazon Music, more so than with other streaming services.
I wish that were true. For some godforsaken reason, Amazon decided to label 16 bit/44.1 kHz files "HD," and everything else that's "higher," even when only the bit rate is higher at 24 bits "Ultra HD," which includes 24/44.1, 24/48, 24/96, and 24/192 tracks. In my Windows Amazon app, when a song is playing, I can only see if it's "HD" or "Ultra HD," not the actual bit/sample rate. I have to click on the "HD" or "Ultra HD" sign of the song to open a small window showing the actual original file bit/rate. THEN, I have to open a separate Windows Audio pane to change it manually to match the original file bit/rate.
I don't believe the issue is something an end-user can troubleshoot, certainly not without coding skills the average consumer does not possess. At least with Android, the problem is initially with the OS itself. Android automatically resamples everything to a 48k sample rate. Qobuz and Tidal address this by allowing the use of 3rd party playback sw (i.e. UAPP) with their content, thus allowing playback at the native sample rate. Amazon has not thus far been inclined to do that. Amazon could also change their app to allow the playback parameters to bypass the Android audio stack (as UAPP does) and avoid the resampling, but has also chosen not to do that. Their playback app for Windows similarly requires use of the windows audio stack for playback, requiring manual setting of the playback parameters to match the native ones of the track rather than automatically changing to match each track, if one thinks avoiding resampling is a requirement. Any resampling occurring during playback means it is not bit-perfect, so it is not as unrelated to your complaint as you say. The cause of your complaint and of the lack of bit-perfect playback are the same. Amazon's apps also check your internet speed and automatically playback at lower sample rates to avoid dropouts and other playback artifacts caused by too-low connection speeds. Thus the setting called "best available." This is probably a result of them deciding to serve the masses rather than audiophiles. I cannot say if that is a wise business decision or not, but I think it probably is.
