[FlacFan]

I had this POP every now and then as well.
HOWEVER:
1. Never when used as an USB DAC
2. Never when my laptop was the source

Thus I suspect my phone BT Tx to do this and since I also had this POP when my phone was (BT) connected to my car Rx I concluded that the UP4 is not at fault.

YMMV but I think you should investigate your case a bit more before jumping to a conclusion.

Cheers

 

[crabdog]

I haven't experienced any pops with mine and I've been using it with several different iems for the last few days. The voice prompt also seems just fine to me, even a little quiet with sensitive iems. Really enjoying my UP4 so far and I have no need or desire for an app.

 

[chickentender]

I'm using mostly IEM's for the UP4, and it get's a bit too loud.
An option to disable/enable the voice in the APP would be a great idea.

Also. the pop. God. I was enjoying the UP4 so much and then they happened, and it just ruined all the joy.
Couldn't listen for the rest of the day because my ears hurt so much.

That's too bad. Haven't experienced it yet (knock on wood). Yes, there's ample power for IEMs (that's what I use 80% of the time as well).. volume is not a problem. The voice level has always seemed right on for me personally. Maybe I listen at lower volumes in general - or maybe my hearing is going.

 

[chickentender]

Thus I suspect my phone BT Tx to do this and since I also had this POP when my phone was (BT) connected to my car Rx I concluded that the UP4 is not at fault.

Quite likely. I get occasional pops on my old phone that uses AAC, but on my laptop with AptX and new phone with LDAC never have. But I also get pops when connected to my Bluesound Node 2i connected via AptX-HD if I move too far. Really is device dependant I'd say.

 

[thesheik137]

Using with my phone (ldac, OnePlus 5t) the volume of the Up4 resets everytime I turn it on such that the voice propmt is never loud. I thought that was the case for everyone but I guess not, as it seems source dependent.

 

[johnchpark]

I just learned my lesson and always turn on the device, and start the music BEFORE i plug in my iem.

 

[inevitableso]

I had this POP every now and then as well.
HOWEVER:
1. Never when used as an USB DAC
2. Never when my laptop was the source

Thus I suspect my phone BT Tx to do this and since I also had this POP when my phone was (BT) connected to my car Rx I concluded that the UP4 is not at fault.

YMMV but I think you should investigate your case a bit more before jumping to a conclusion.

Cheers

I had this pop too whenever I use LDAC on my UP4 it's weird really annoying but not the loud pop but more like constant disconnection of the right channel on my IEM switchingt o aptxHD fixed it

 

[Cycie]

Possibly will come as one of features in the companion app.

Charging system on UP4 should be eliminating constant recharging when used as USB DAC, reducing any longterm risk to battery.

If utilized primarily as USB DAC, would UP4 still maximize the DAC sound? Since USB DAC is a marketed feature but is it recommended for primary use too?
I'll only be using the main BT functionality for when on the go and USB DAC on the daily for laptop and at home use.

Which reminds me, if I could use the UP4 as DAC only and connect an external desktop amplifier?

Thanks for considering the app feature, any news for the release date if it moved further due to the virus?

 

[Shanling]

If utilized primarily as USB DAC, would UP4 still maximize the DAC sound? Since USB DAC is a marketed feature but is it recommended for primary use too?
I'll only be using the main BT functionality for when on the go and USB DAC on the daily for laptop and at home use.

Which reminds me, if I could use the UP4 as DAC only and connect an external desktop amplifier?

Thanks for considering the app feature, any news for the release date if it moved further due to the virus?

When used as USB DAC, you might be little bit limited by its USB input(only up to 16/48 playback).

UP4 has no DAC only or Line-out mode/circuit. But of course you can still connect it to external amplifier without problems.

No news for the app.

 

[chickentender]

When used as USB DAC, you might be little bit limited by its USB input(only up to 16/48 playback).

I am confused by this statement. It was my understanding that the UP4 as USB DAC supported up to 24/96 Hires audio.
Or do you mean limited in terms of the USB source audio, e.g. the UP4 will not upsample? Can you clarify this response?

 

[Shanling]

I am confused by this statement. It was my understanding that the UP4 as USB DAC supported up to 24/96 Hires audio.
Or do you mean limited in terms of the USB source audio, e.g. the UP4 will not upsample? Can you clarify this response?

UP2 or UP4 don't support 24/96 over USB input, it's limited to 16/48. For Hi-Res playback you would need to go with Bluetooth connection.

 

[crabdog]

Posted my UP4 review today for anyone interested. Very impressed with the BT audio quality and ease of use.

 

[chickentender]

UP2 or UP4 don't support 24/96 over USB input, it's limited to 16/48. For Hi-Res playback you would need to go with Bluetooth connection.

I just figured this out for myself after pouring over many pages of this thread, but thank you. That's an unfortunate revelation for me personally - I had assumed differently based on the DAC chip itself, and that tidbit is a little obscured in the specifications. I've only one device that supports LDAC, my LG phone, which in most cases I don't bother using the UP4 with as it just isn't necessary. Otherwise I'm limited to AptX and AptXHD. That's a shame. Is this is a USB hardware limitation on the UP4 itself specifically?

 

[Shanling]

I just figured this out for myself after pouring over many pages of this thread, but thank you. That's an unfortunate revelation for me personally - I had assumed differently based on the DAC chip itself, and that tidbit is a little obscured in the specifications. I've only one device that supports LDAC, my LG phone, which in most cases I don't bother using the UP4 with as it just isn't necessary. Otherwise I'm limited to AptX and AptXHD. That's a shame. Is this is a USB hardware limitation on the UP4 itself specifically?

It's limitations of USB solution used on UP4/UP2.

Will check if we can add it to specifications, to make it more clear.

 

[yorosello]

UP2 or UP4 don't support 24/96 over USB input, it's limited to 16/48. For Hi-Res playback you would need to go with Bluetooth connection.

Ah that's why i can't play 24/96khz flac files in usb dac mode