Is Audio Ducking Normal When Making Calls?

iPhone 17 Pro Max iOS 26.0.1

I’ve noticed that when I tap the first number or two when making a call, the tone sort of “ramps” up. I don’t know if this is actually characteristic of audio ducking … but that’s the suggestion I got when searching the issue.

Sound to me like a delay as the iPhone is “thinking” hmmm do I have enough power to start the engine.

Is this a bug? or a new feature. … I don’t quite get the utility of the feature

I’ve noticed a similar effect when tapping keys on PCalc, the volume of the tap noise changes as I go along, iOS 18.6.2 (‘Pasadena’ shall we call it? iOS versions don’t get location names, unfair!)

I also don’t get the usefulness of the change in volume. Ordinary calculators make the same noise no matter how many times I tap the keys.

just tried my phone and the ramping did not occur. This feels more like a bug than a feature.

Perhaps we’ll know in a couple of days I hear the train-a-comin’ on 26.1.

there are a lot of weird things happening on my phone

wrong text threads opeing

super weird spelling phenomenon … I know I have thick digits but this is some way out stuff in iOS 26

also I notice text threads have scrolled alllllllllllllllll the way to the first entry requiring me to swipeswipeswipeswipe for ages to get current on large archived thread

Sheesh

“When you dial a phone number on a touch tone telephone, the telephone generates a dual tone multifrequency (DTMF) . In other words, the sound that you hear is the sum of 2 sinusoidal signals at different frequencies; therefore the name DTMF. Every time a key is pressed, a combination of a high frequency tone and a low frequency tone represents a specific digit or character, * and #.”

Hmmm

Does that sort of suggest that iOS is not syncing the two frequencies properly?

Currently, at the moment, the phone app’s tone is crisply muliti-sonic but frequently the lower tone ramps up to speed to catch up to the higher tone the first couple/few taps