Android P may feature native support for call recording, as suggested by a number of commits recently discovered in the main repository of the Android Open Source Project. Some code added to AOSP by Google's engineers references the existence of a "call recording tone" that would presumably be played once users press the corresponding button in order to start recording their conversation. The tone itself is said to be of the 1,400Hz variety, meaning people of all ages should be able to hear it without any issues, with one of the commits referring to it revealing that it's meant to be played every 15 seconds while the conversation is being recorded, presumably as to remind the person who didn't initiate the recording that it's still participating in one.
Another reference to the functionality indicates Google is planning to make it available to third-party developers, suggesting the tech will be offered as part of an application programming interface (API). Certain Android devices such as the ones from OnePlus already support native call recording but Alphabet's subsidiary never signaled such a feature may be in the works for the stock version of its operating system. Android P is widely expected to be identified by the version number 9.0 and its first developer preview is close to being finalized, according to recent reports.