The top line news is that Apple is making changes to the way that Siri audio review, or “grading,” works across all of its devices. First, it is making audio review an explicitly opt-in process in an upcoming software update. This will be applicable for every current and future user of Siri.

Second, only Apple employees, not contractors, will review any of this opt-in audio in an effort to bring closer to the company’s core processes any process that uses private data.

Apple has released a blog post outlining some Siri privacy details that may not have been common knowledge, as they were previously described in security white papers.

Apple apologizes for the issue.

“As a result of our review, we realize we haven’t been fully living up to our high ideals, and for that we apologize. As we previously announced, we halted the Siri grading program. We plan to resume later this fall when software updates are released to our users — but only after making the following changes…”

It then outlines three changes being made to the way Siri grading works:

First, by default, we will no longer retain audio recordings of Siri interactions. We will continue to use computer-generated transcripts to help Siri improve.

Second, users will be able to opt in to help Siri improve by learning from the audio samples of their requests. We hope that many people will choose to help Siri get better, knowing that Apple respects their data and has strong privacy controls in place. Those who choose to participate will be able to opt out at any time.

Third, when customers opt in, only Apple employees will be allowed to listen to audio samples of the Siri interactions. Our team will work to delete any recording which is determined to be an inadvertent trigger of Siri.

Apple is not implementing any of these changes, nor is it lifting the suspension on the Siri grading process that it halted, until the software update becomes available for its operating systems that will allow users to opt in. Once people update to the new versions of its OS, they will have the chance to say yes to the grading process that uses audio recordings to help verify requests that users make of Siri. This effectively means that every user of Siri will be opted out of this process once the update goes live and is installed.

Apple says that it will continue using anonymized computer-generated written transcripts of your request to feed its machine learning engines with data, in a fashion similar to other voice assistants. These transcripts may be subject to Apple employee review.

Amazon and Google had previous revelations that their assistants were being helped along by human review of audio, and they have begun putting opt-ins in place as well.

Apple is making changes to the grading process itself as well, noting that, for example, “the names of the devices and rooms you setup in the Home app will only be accessible by the reviewer if the request being graded involves controlling devices in the home.”

A story in The Guardian in early August outlined how Siri audio samples were sent to contractors Apple had hired to evaluate the quality of responses and transcription that Siri produced for its machine learning engines to work on. The practice is not unprecedented, but it certainly was not made as clear as it should have been in Apple’s privacy policies that humans were involved in the process. There was also the matter that contractors, rather than employees, were being used to evaluate these samples. One contractor described audio as containing sensitive and private information that, in some cases, may have been able to be tied to a user, even with Apple’s anonymizing processes in place.

In response, Apple halted the grading process worldwide while it reviewed the process. This post and updates to its process are the result of that review.

Apple says that around 0.2% of all Siri requests got this audio treatment in the first place, but given that there are 15 billion requests per month, the quick math tells us that though it is statistically insignificant, the raw numbers could be quite high.

The move away from contractors was signaled by Apple releasing employees in Europe, as noted by Alex Hearn earlier on Wednesday.

Apple is also publishing an FAQ on how Siri’s privacy controls fit in with its grading process; you can read that in full here.

The blog post from Apple and the FAQ provide some details to consumers about how Apple handles the grading process, how it is minimizing the data given to data reviewers in the grading process and how Siri privacy is preserved.

Apple’s work with Siri from the beginning has focused enormously on on-device processing whenever possible. This has led a lot of experts to say that Apple was trading raw capability for privacy by eschewing the data-center heavy processes of assistants from companies like Amazon or Google in favor of keeping a “personal cloud” of data on device. Sadly, the lack of transparency on human review processes and the use of contractors undercut all of this foundational work Apple has been doing from the beginning. So it’s good that Apple is cranking all the way back to past industry standard on its privacy policies regarding grading and improvement. That is where it needs to be.

The fact is that no other assistant product is nearly as privacy focused as Siri — as I said above, some would say to the point of hampering its ability to advance as quickly. Hopefully this episode leads to better transparency on the part of Apple when humans get involved in processes that are presumed to be fully automated.

Most people assume that “AI” or “machine learning” mean computers only, but the sad fact is that most of those processes are intensely human driven still because AI (which doesn’t really exist) and ML are still pretty crap. Humans will be involved in making them seem smarter for a very long time yet.