After updating packages (which brought them up to Kokoro 1.0.11 and MLX 0.30.2) produced audio sounds like random noise

[iafan]

Just yesterday, before the most recent commit (a883de3) I compiled and ran the test app — it was producing spoken audio as expected. Today I updated packages, which brought Kokoro from 1.0.10 to 1.0.11, mlx-swift from 0.29.1 to 0.30.2 and MisakiSwift from 1.0.5 to 1.0.6. Now after ruinning the app, instead of speech I get just white noise-like sound (as if I'm just getting random data in the buffer, not audio). Resetting dependencies to previous versions for these three packages solves the issue.

I'm compiling this for iOS (iPhone 16 Pro Max) and iOS 26.

[gregschwartz]

Had the exact same problem, and downgrading it fixed it! Thanks @iafan for posting this!!

[gregggreg]

I can confirm that the latest KokoroSwift 1.0.11 with MisakiSwift 1.0.6 and mlx-swift 0.30.2 produces an audio MLXArray that exceeds [0,1] and is just random crackly audio on iOS 26 and macOS 26.

It produces normal audio on iOS 18 and macOS 15.

Only solution currently is to revert back to KokoroSwift 1.0.10.

Hopefully @mlalma can look into this sometime soon.

[mlalma]

The only thing that I can come up with is that something has changed on MLX, since 1.0.10 -> 1.0.11 upgrade is only about updating the MLX version. I have not been able to reproduce on my own setup (M4 MacBook and iPhone 15)

[mlalma]

I merged @gregschwartz pull request, need to investigate why it seems to be happening on some of the devices

[gregggreg]

I wonder if @Blaizzy could be of any help? His Voices test app for iOS mlx-audio-swift is using MLX 0.32.2 on iOS 26 with no issues, although it doesn't currently support Kokoro.

[hanej]

Downgrading according to iafan's original comment fixed the issue for me running on iOS 26.3.