Chord Mojo 2 Thread ___ [product released January 31, 2022 -- starting on page 95 of thread]
Oct 29, 2022 at 5:20 PM Post #5,686 of 11,840
WHITE NOISE.

I have Mojo not Mojo 2. I normally use coaxial in from a Fiio M11 Plus so as to not have an issue with white noise. I had never experienced the white noise problem but for the cost of a nice little Moon Audio cable I thought I could avoid the risk so it seemed like a no brainer.

Anyway, I recently got a iPad mini 6 and have been using that with the Mojo a bit. The other day I was doing some A-B testing with iPad into the Mojo with a very firm fitting ddhifi C to Micro cable and was swapping out headphones plugs while very firmly holding the Mojo down on the desk. I am 99% confident that between the snug fit of the cable, me holding the Mojo and the fact the cable was still very well seated afterwards the USB cable was not disturbed.

Well I got the white noise, luckily I was using DCA Aeon so it wasn’t actually very loud.

Just throwing that out there for consideration.

To me I am 99% certain the only thing that was happening to the Mojo was headphone swapping and it seems that somehow triggered the white noise.

Unless it was purely coincidental and it just started on its own out of the blue, the same track was playing the whole time, there was no change in music source so that doesn’t seem likely but perhaps it could be what happened.
Chord design FLAW.....
 
Oct 29, 2022 at 11:59 PM Post #5,687 of 11,840
WHITE NOISE.

I have Mojo not Mojo 2. I normally use coaxial in from a Fiio M11 Plus so as to not have an issue with white noise. I had never experienced the white noise problem but for the cost of a nice little Moon Audio cable I thought I could avoid the risk so it seemed like a no brainer.

Anyway, I recently got a iPad mini 6 and have been using that with the Mojo a bit. The other day I was doing some A-B testing with iPad into the Mojo with a very firm fitting ddhifi C to Micro cable and was swapping out headphones plugs while very firmly holding the Mojo down on the desk. I am 99% confident that between the snug fit of the cable, me holding the Mojo and the fact the cable was still very well seated afterwards the USB cable was not disturbed.

Well I got the white noise, luckily I was using DCA Aeon so it wasn’t actually very loud.

Just throwing that out there for consideration.

To me I am 99% certain the only thing that was happening to the Mojo was headphone swapping and it seems that somehow triggered the white noise.

Unless it was purely coincidental and it just started on its own out of the blue, the same track was playing the whole time, there was no change in music source so that doesn’t seem likely but perhaps it could be what happened.
I have both the Mojo original and Mojo 2.
Experienced the white noise with both occasionally, and for sure also without mechanically disturbing the cable. If I remember correctly it happened most frequently with the Lightning cables.

I have gone through a number of them, always bought at least 2, and one of the first ones was the worst, others lastet for a year or more. Get a new cable.
 
Oct 30, 2022 at 2:54 AM Post #5,688 of 11,840
WHITE NOISE.

I have Mojo not Mojo 2. I normally use coaxial in from a Fiio M11 Plus so as to not have an issue with white noise. I had never experienced the white noise problem but for the cost of a nice little Moon Audio cable I thought I could avoid the risk so it seemed like a no brainer.

Anyway, I recently got a iPad mini 6 and have been using that with the Mojo a bit. The other day I was doing some A-B testing with iPad into the Mojo with a very firm fitting ddhifi C to Micro cable and was swapping out headphones plugs while very firmly holding the Mojo down on the desk. I am 99% confident that between the snug fit of the cable, me holding the Mojo and the fact the cable was still very well seated afterwards the USB cable was not disturbed.

Well I got the white noise, luckily I was using DCA Aeon so it wasn’t actually very loud.

Just throwing that out there for consideration.

To me I am 99% certain the only thing that was happening to the Mojo was headphone swapping and it seems that somehow triggered the white noise.

Unless it was purely coincidental and it just started on its own out of the blue, the same track was playing the whole time, there was no change in music source so that doesn’t seem likely but perhaps it could be what happened.

Same on my side, I get white noise from time to time.
 
Oct 30, 2022 at 5:16 AM Post #5,689 of 11,840
I have both the Mojo original and Mojo 2.
Experienced the white noise with both occasionally, and for sure also without mechanically disturbing the cable. If I remember correctly it happened most frequently with the Lightning cables.

I have gone through a number of them, always bought at least 2, and one of the first ones was the worst, others lastet for a year or more. Get a new cable.

The cable that it happened with is literally a couple of weeks old, is in perfect condition and has worked flawlessly before and since.
 
Oct 30, 2022 at 5:23 AM Post #5,691 of 11,840
Chord design FLAW.....

Not just Chord then.

I have had white noise problems with two other DACs, both Schiit products with their Unison USB.

Perhaps the white noise is caused by some kind of USB incompatibility problem that can literally happen out of the blue and people think it is directly caused by cables, something they are doing with the unit or something to do with the music source when in fact it is possibly just a general incompatibility problem that can actually be triggered by any number of causes.
 
Oct 30, 2022 at 6:08 AM Post #5,692 of 11,840
Anything specific seem to start it or just random ?

I might stick to running Mojo off my DAP via coaxial, sounds like USB problem.
The white noise is caused when the sample rate is switched by DAC. It cannot be prevented by changing the cables.

Yes, it only happens with USB. If you use coaxial or optical, you are safe.

The issue is very random and it's been discussed a lot on this thread.
 
Last edited:
Oct 30, 2022 at 6:30 AM Post #5,693 of 11,840
The white noise is caused when the sample rate is switched by DAC. It cannot be prevented by changing the cables.

Yes, it only happens with USB. If you use coaxial or optical, you are safe.

The issue is very random and it's been discussed a lot on this thread.
I thought it was a USB problem as well, but I had it happen last night with the coax input. I was feeding my Mojo 2 through the coax out of my DX320 and got a blast of white noise when I tried switching from playing a PCM file to a DSD file. I quickly hit pause and restarted the app on the DX320. Hit play and again got a blast of white noise. Luckily, I had the volume turned down on my Lyr. I noticed the globe on the Mojo 2 would turn yellow as I tried to play the DSD file, then go off again as the white noise started, as if the DAC was having trouble locking onto the new file format.
 
Oct 30, 2022 at 7:33 AM Post #5,694 of 11,840
I thought it was a USB problem as well, but I had it happen last night with the coax input. I was feeding my Mojo 2 through the coax out of my DX320 and got a blast of white noise when I tried switching from playing a PCM file to a DSD file. I quickly hit pause and restarted the app on the DX320. Hit play and again got a blast of white noise. Luckily, I had the volume turned down on my Lyr. I noticed the globe on the Mojo 2 would turn yellow as I tried to play the DSD file, then go off again as the white noise started, as if the DAC was having trouble locking onto the new file format.
Then that's really bad I thought coaxial was safe. I have been using optical input and never once occurred the white noise issue.
 
Oct 30, 2022 at 9:44 AM Post #5,695 of 11,840
Mine has got a lot worse since updating my iPhone from X to 14. Only once had a problem on the X and that was a half inserted lightning connector. It now happens frequently with high rate music but not low rate. Un plugging and replugging the cable clears it.
 
Oct 30, 2022 at 9:51 AM Post #5,696 of 11,840
Anything specific seem to start it or just random ?

I might stick to running Mojo off my DAP via coaxial, sounds like USB problem.

It happened when I was manipulating my phone/mojo or when I didn’t do anything.

However it is a rare issue and I fully enjoy the sound of Mojo 2: more lighter, refined, quick and 3D sounding than Mojo OG (which I loved by the way).
 
Oct 30, 2022 at 11:15 AM Post #5,697 of 11,840
Disappointing to see that Chord still has not addressed the issue with the USB firmware used In their DACs.
 
Oct 30, 2022 at 12:01 PM Post #5,698 of 11,840
The white noise is caused when the sample rate is switched by DAC. It cannot be prevented by changing the cables.

Yes, it only happens with USB. If you use coaxial or optical, you are safe.

The issue is very random and it's been discussed a lot on this thread.

I had read about it and understood that it was said to be a sample rate switching problem in USB but when my incident happened it was literally in the middle of a song while I was A-B testing so plugging in and unplugging headphone cables so there was no switching of anything going on.

As indicated above I have also had white noise with two Schiit DACs with Unison USB. One seemed to be related to a cable that was a problematic fit. The other situation was a Fiio DAP into a Modi and it would happen every time I used that combination after a minute or two use. I tried numerous cable and none made any difference and the Modi was absolutely fine if used with an iPad streaming from the same source as the DAP.

I have to question if the white noise with Mojo is actually understood fully and perhaps that is why it is a problem that has transferred over to the Mojo 2.

From my experience with Mojo and two Schiit DACs it might be that it CAN be caused by sample rate switching but I don’t believe that it is ONLY caused by that.
 
Last edited:
Oct 30, 2022 at 12:06 PM Post #5,699 of 11,840
Disappointing to see that Chord still has not addressed the issue with the USB firmware used In their DACs.

I have a feeling the problem isn’t perhaps as simple as that.

Maybe it CAN be caused by sample rate switching but based on my experience I don’t believe it is ONLY caused by that.

If Chord understood the problem with Mojo surely it would have been fixed in the intervening 5-6 years that they were working on the Mojo 2.
 
Last edited:
Oct 30, 2022 at 1:36 PM Post #5,700 of 11,840
It’s as simple as adding a mute function when the USB synchronization fails. Remember, Chord DACs all share the same USB firmware and it isn’t simply a Mojo 2 issue— though, it seems to be far more prevalent in that device.
 

Users who are viewing this thread

Back
Top