digital output dropping after ios 10.3.1 update

Wow, the observation that it was completely fixed in a close-to-final-release beta and then we got, as a final release, an issue with glitches is interesting.

I tried to enroll in the public beta program a few weeks ago, but the only available download was iOS 11 beta2 (which I didn't want, after reading the issues people are experiencing with it) and couldn't find a way to download 10.3.3 beta. Since 10.3.3 has been released, I suppose its not possible to get older betas.

I guess we have to keep complaining to apple, and get the usual "you must not be using certified cables" answer, as I don't think these threads are monitored by apple. I would like to see an apple employee use the apple music app with their own apple cable connected to an apple certified dac like the oppo and show me what I am doing wrong ...that would be priceless.

Has anyone found a solution? I wrote again to Chord. Nothing. So, I decided to post a review, saying the Mojo is a great DAC but if you want to use it with an iPhone, etc., you should know it no longer works correctly. Chord never posted it, though that was my only negative, and I thought I should save people money and time and trouble as Chord was not even acknowledging the issue, except fora couple of sentences hidden way down in the site. Apple clearly doesn't care.

I have had the same issue with Oppo products. The Oppo customer support told me that they are out of ideas. Everytime they fix something Apple comes along with a new firmware that causes new issues.

I talked to Apple (1hr on the phone + 20 mins genius bar). They said that it is an issue of the 3rd party manufacturer and I should only use Apple products. I showed them the MFi label. Then they told me to wait for iOS11.

I decided to move away from Apple after 10 years.

Please don't blame 3rd party/MFi products for this. It is 100% Apples fault.

When Steve Jobs died, Apple died too. It's sad but true.

Hi all,

I just downloaded and tried ios11 on my iphone6 with both an oppo-HA2SE and HA2.

The glitches and drop-outs all appear to be gone, finally, at least in my case. I tried a variety of files, everything from 44khz up to 192khz FLACs. I also tried a few apps, including streaming sites (Pandora, Amazon). No issues observed.

I will try my Apogee One later today on my drive home, but I never had an issue with that hardware in any iOS release (although I think others did).

Hi all,

i have to retract that... I got two glitches in 30 minutes. it's significantly better, but the problem is still there.

In my case: the story goes like this with an oppo HA-2SE and HA-2 with an iphone6:

pre-10.3: no issues

10.3.2: dropouts which forced resets typically every minute or so. Basically, it is not usable.

10.3.3: glitches at the same intervals as 10.3.2, but it recovered automatically... no need to reset anything.

11: glitches infrequently, approx every 15 or so.

Last night I downloaded iOS 11 on my iPhone 6, too, as I wanted to once again be able to listen while traveling and commuting – something I haven’t been able to do for what seems like half the year already. The glitches and drop-outs remain. If anything, I think it’s worse than 10.3.3. It once again will actually stop playing, though I did have to pull and reinsert the CCK once. Other times, I just had to press play a few times. As a reminder, I use Chord Mojo. Does anyone have a recommendation for a phone or a portable DAP that does work with the Chord Mojo? Thanks for any help.

Still no improvement although I've tried quite a few different settings, airplane mode, cables, both the USB 2 and USB 3 CCKs. I thought I saw Chord, on its Facebook page yesterday, say the Mojo was working with iPhone's iOS 11, but I may have been wrong. I do see comments from several others saying it's still not working. Earlier in the year, Chord said the same when 10.3.3 came out in August: "It seems that Apple may have fixed its issue with the Camera Connection kit in the latest ioS 10.3.3 update - we're seeing full-on Mojo action here with our devices and connectors. Do let us know how you're getting on!" Inadeje, I'm glad you've managed to get it working. I was wondering if it's your later model iPhone, but one of the FB comments was "Mojo still not working With iOS 11 And iPhone 7." I have the 6S, so I can't say. Or maybe it has to do with your new Oppo vs our Chord Mojos? Is anyone else here continuing to have the same problem after upgrading to iOS 11?

I tried 11.0.1 today... it's actually worse than 11.0... the glitches are far more frequent now... I got one glitch every 1-2 seconds 5 times in a row.

I wonder if the majority of people having trouble, still, are using something older than an iPhone7.

Still, Apple cannot seem to get this right. It seems clear they are at fault and will simply do nothing about it. I wonder what would happen if I took the phone and the certified OPPO HA2-SE to the apple store and demo'ed the problem? They'd probably tell me it's the OPPO... well, I have 2, I can bring both of them to rule out an outlier. Then, I suppose the response will be that it's a general OPPO problem.

Hi all,

Another new twist for me. I just switched from a 6 to a 6s and the drops are gone in 11.0.1.

So, either it's a marginal problem and some combinations of HW simply don't have the issue or it's tied specifically to the model of the phone.

The marginal observation could make sense in that some people with the same HW simply don't have the issue, whereas others do... and some have it bad and some not so bad.

Could even be a version of the HW itself within the iPhone causing the differences...?

I also suspect some combinations of hardware and iOS after 10.0. Since 11.0 and 11.01 not only didn't help but also had other issues (slowness and incredible battery drain), I went back to 10.3.3. After I downgraded while I still could, I plugged in the Chord Mojo using the CCK USB3 and a Lightning into that to power, as a test. Not expecting much, surprisingly everything worked again. I listened for 5 hours or so without any issue whatsoever. It reminded me how nice that is. As soon as I switched to the older but simpler, smaller USB2 CCK, the old issues came back.

I'm saying this only to let others know of that experience.

I will buy a DAP and forget Apple, Chord Mojo, and Chord Electronics. I unfortunately still need my iPhone for work, but will drop it as soon as feasible. Even between Apple products (my MacBook and iPhone), software doesn't sync as it should, and inconsistencies show up between the supposedly synced data of various Apple apps, e.g., my address book and calendar, that go against the reason I adopted them in the first place: ease and compatibility.

I hope others have better luck. Apple's lost its vision.

The issue is not resolved. iPhone 7, iOS 11.0.2, Oppo HA2, Onkyo HF Player playing 96K/ 24 bit FLAC, brief pauses in the sound. It can go 20 minutes without happening, and appears to be happen when I am not using the phone for anything else. The Oppo is MFI certified, and I am using an Apple 0.5m Lightning to USB cable.

With 11.0.2, output still intermittently drops when using iPhone 7p, mojo and CCK3.

I invested the unit for better music experience but turned out to be a torture. Truly disappointing! Doesn’t Apple know the problem? Or how does it benefit from this?

I know exactly what you mean. But I'd like to thank you and everyone for sharing their problems with both the iOS versions and the different hardware configurations. It seems no matter which iPhone is used, the problems can be exhibited with DACs.

Again, if anyone has any recommendations for DAPs that work with the Cord Mojo, please share.

No progress. iPhone 7, iOS 11.1 (15B93), Apple 0.5m Lightning cable, Oppo HA 2 DAC (MFI certified). Audio skips randomly; it can go for 20 minutes without issue and then skip several times in five minutes. Clearly, MFI certification is a worthless designation.

I found this in Google News today under technology. Here is my edited version: Apple appears to be slowing down old iPhones by throttling processor speeds when a battery capacity deteriorates over time. Geekbench developer John Poole has mapped out performance for the iPhone 6S and iPhone 7 over time, and has come to the conclusion that Apple’s iOS 10.2.1 and 11.2.0 updates introduce this throttling for different devices. iOS 10.2.1 is particularly relevant, as this update was designed to reduce random shutdown issues for the iPhone 6 and iPhone 6S. Apple’s fix appears to be throttling the CPU to prevent the phone from randomly shutting down." I've seen other mappings of this phenomenon. Apple has denied this, but tests confirm this is happening. It may be good for the majority of users. But as my digital output dropping problems started with iOS 10.2.1, I wonder if this might be the cause for many of us. We all assume (realize) it's in the software, and that it started at this time. In any case, I did get a player that doesn't have this problem. I'm not happy carrying it around in addition to my iPhone, but at least I can listen without a problem. Still, I thought I should share this.