# BR: CoreAudio - audioDeviceIOCallback no longer called after sample rate change

**URL:** <https://forum.juce.com/t/br-coreaudio-audiodeviceiocallback-no-longer-called-after-sample-rate-change/50190>\
**Category:** MacOSX and iOS\
**Created:** [February 15, 2022, 10:29am UTC](https://forum.juce.com/t/br-coreaudio-audiodeviceiocallback-no-longer-called-after-sample-rate-change/50190 "2022-02-15T10:29:27Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![andrewj](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/andrewj/32/13428_2.png) [@andrewj](https://forum.juce.com/u/andrewj)\
**Post date:** [February 15, 2022, 6:54pm UTC](https://forum.juce.com/t/br-coreaudio-audiodeviceiocallback-no-longer-called-after-sample-rate-change/50190/5 "2022-02-15T18:54:59Z")

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Sorry Reuben, its occurring on the current develop tip, with a 9 year old Intel iMac running 10.15.7. The issue was originally reported to me by a user with a MacBook (platform unspecified).

I’ve just done a bit more testing and found the issue is only occurring for me with a multi output composite audio device created in the Audio MIDI Setup app. I’ll check with my user to see if they were also using a composite device (I had assumed not because they usually use my app to test their own device drivers).

Apologies again for my lack of thoroughness, and the consequent sub-optimal use of your time.

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