Tone matching
Also: register
Updated
Definition
Tone matching is a formatting feature that writes the same dictated words differently depending on where they are going: lowercase and loose in a chat app, punctuated and complete in an email, untouched in a terminal. The linguistic term for the level of formality is register.
You do not write the way you speak, and you do not write the same way everywhere. "shipping this today will ping you when it’s live" is right in Slack and wrong in a client email, and the words you said were the same both times. A dictation tool that produces one house style for every destination is right in one app and slightly off in all the others.
Tone matching reads the app you are dictating into and applies a style rule for it. The rule can be inferred from the app’s category, chat versus mail versus notes versus code, and it should be something you can pin per app when the default is wrong for you.
What changes between registers
Casual: sentence case optional, fragments allowed, contractions kept, an emoji if you said one. Professional: full sentences, proper capitalization, contractions expanded where they read as slack, a greeting and sign-off preserved if you dictated them. Neutral: clean and complete without the polish. Verbatim: nothing changes. What never changes, in any register, is your content: the words you said are the words that land, arranged for the room.
Context, read locally
The app is the first signal. The second is the text already on screen: a reply to a thread should pick up the names in it and match its level of formality. Reading that field is a real privacy question, and the difference between tools is stark. Some send a screenshot to a server. A careful tool reads the focused field on the machine, keeps it in memory for one dictation, and stores nothing.
When to pin a rule
When the category guess is wrong for you. A founder who writes to investors in Messages wants professional there; a developer who dictates commit messages in a terminal may want neutral rather than verbatim for that one field. The rule should be one setting per app, visible, and reversible, and the defaults should be good enough that most people never open it.
How to test tone matching in any dictation app
You can check what a tool does to your tone in five minutes. The test is the same sentence, spoken the same way, in three different apps. What you compare is the form of the result and whether any word changed.
- Pick one sentence of about twenty words that includes a name, a number, and a contraction.
- Dictate it into a chat app, such as Messages.
- Dictate the same sentence into a new email in Mail.
- Dictate it a third time into a plain text editor or a terminal.
- Put the three results side by side and compare capitalization, punctuation, and contractions.
- Check that the name, the number, and every content word are identical in all three. If a word was added, dropped, or swapped, the tool is rewriting, not matching tone.
Tone matching vs AI rewriting
The two are easy to confuse because both use a language model and both change the text. Tone matching changes form: case, punctuation, contractions, and whether fragments are completed. Rewriting changes content: it picks different words, reorders ideas, and may add or remove a point.
The practical difference is trust. After tone matching you can send the text without reading it against what you said, because the words are yours. After a rewrite you have to proofread for meaning. If you want a rewrite, ask for one as a separate step, so you always know which kind of change was made.
How to see which apps can read what is on your screen
A tool that matches tone to the thread you are replying to has to read text from other apps. On a Mac, that goes through the Accessibility permission, and you can review the list of apps that hold it at any time.
- Choose Apple menu → System Settings, then click Privacy & Security in the sidebar.
- Click Accessibility.
- Read the list of apps. Each one that is turned on is allowed to control your Mac through the accessibility features.
- Turn off any app you do not recognize or no longer use.
- For each dictation tool that stays on, read its privacy statement to see whether the text it reads stays on your Mac.
Questions people ask.
What does per-app tone mean in a dictation app?
The tool writes the same words differently depending on the app you are in: casual in a chat app, professional in email, verbatim in a terminal. You can usually override the rule per app.
Does tone matching change what I said?
It changes the form, not the content: capitalization, punctuation, contractions, sentence completeness. Your words should survive in every register, and a tool that keeps a content check on its output guarantees that.
How does the tool know which app I am in?
From the frontmost application, which macOS reports through the accessibility layer. Some tools also read the focused text field for the names and formality of the thread; ask whether that reading happens locally or on a server.
Is tone matching the same as rewriting with AI?
No. Tone matching changes capitalization, punctuation, and contractions and keeps your words. Rewriting chooses new words and can change the meaning, so it needs proofreading.
Does Apple Dictation change punctuation for different apps?
Apple documents auto-punctuation as a single setting under System Settings → Keyboard → Dictation. It is either on or off for Dictation as a whole, and it inserts commas, periods, and question marks in supported languages.
What is register in writing?
Register is the level of formality of a piece of writing. A text to a friend and an email to a client can say the same thing in two registers, and tone matching is the feature that picks the register for you.
