991 Carrera 4S
100+ Head-Fier
First of all, thank you very much for your reply and for trying to solve the issues with UA4.1) Are you talking about hiss? Or some distortion or anything else?I received my Shanling UA4 yesterday and am very disappointed.
Because in UA4, basic things are badly implemented, so that the sound itself doesn't even matter.
I personally do not recommend buying it, until the following issues are fixed:
1) UA4 noise floor is bad. Clearly audible even with my quite un-sensitive ER4SR. This is no issue with iBasso DC04 Pro.
[Update] Noise floor for 3.5mm is fine. Noise floor for 4.4mm is bad.
2) UA4 auto-mute regularly cuts off the first beat of certain tracks. This is also no issue with iBasso DC04 Pro.
To mask/hide the bad noise floor, UA4 has some kind of auto-mute, that automatically mutes output if there is no audio playing. Unfortunately, the response time is too slow and it regularly cuts off the first beat of certain tracks. When changing tracks, it first mutes between the two tracks, but then at the start of the next track un-mutes too slowly and cuts off maybe the first 0.1s of the track. If a track immediately starts e.g. with a kickdrum within the first 0.1s of the track, then the kickdrum (or whatever else is in these first 0.1s) gets cut off.
3) UA4 volume control is annoying, even with the latest firmware update. Again, this is no issue with iBasso DC04 Pro.
Let's say you want to change volume by 5 volume steps.
UA4 with original firmware:
Press volume button, wait for display animation, volume didn't change, press volume button again, wait for display animation, volume changed +1, press volume button again, wait for display animation, volume changed +1, press volume button again, wait for display animation, volume changed +1, press volume button again, wait for display animation, volume changed +1, press volume button again, wait for display animation, volume changed +1. Done.
UA4 with latest firmware (V1.0.2):
Press volume button, wait for display animation, volume didn't change, press volume button 5 times in quick succession, wait for display animation, volume changed +5. Done.
iBasso DC04 Pro:
Press volume button 5 times in quick succession. Done.
This issues need to be fixed as soon as possible and UA4 should never have been sold in this unfinished state.
What device and cable are you using for UA4?
2) Can you please try to adjust the "Idle Time" on your UA4 to Off? It should help in this situation, but it will have impact on power demand.
3) I'm personally also quite unhappy with it, we will discuss it further if it can be made more reactive (like on our UA5)
1) When very quiet music is playing (4.4mm output), there is bad noise floor / background noise / signal noise / static.
I checked 3.5mm output, and noise floor for 3.5mm is fine.
Whereas noise floor for 4.4mm is really bad.
What is going on here?
2) Idle time is set to off, but issue still persists.
Please check "automute" in ES9069 datasheet.
(See attached pictures.)
Deactivation of automute is too slow and cuts off ~0.1s at the beginning of a track.
Please configure it faster (not possible?), or disable it completely.
3) Volume control has to be instant, with no delay at all.
Also please give us firmware option to remove the display animation for volume control.
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