X-CUBE-AUDIO: USB audio high speed not work with iOS

Tony2Simmy · ‎2025-08-06

I use stm32h7r3 to develop USB audio recording function. My device can work successful in Ubuntu/Android/Windows, but failed in iOS. I had tried many iOS version, but still can't work. The below is my device USB parameters:

2 channels L/R

32 bit data length

48KHz sample rate

High speed

UAC1.0

my reference code(stm32F769I) from https://www.st.com/en/embedded-software/x-cube-audio.html

Could someone give me some advice?

FBL · ‎2025-08-07

Hi @Tony2Simmy

X-CUBE-AUDIO-KIT supports STM32H7RS products.

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

View solution in original post

FBL · ‎2025-08-07

Hi @Tony2Simmy

X-CUBE-AUDIO-KIT supports STM32H7RS products.

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

AScha.3 · ‎2025-08-07

Hi,

Did you try with a standard setting?

Like: 48k, 16bit, stereo/2ch ?

If you feel a post has answered your question, please click "Accept as Solution".

Tony2Simmy · ‎2025-08-11

When I change high speed to full speed, iOS can detect my USB device.

It seems that iOS can't support HS in UAC1.0.

Tony2Simmy · ‎2025-08-11

I find out UAC2.0 and tinyusb library in X-CUBE-AUDIO-KIT.

Do ST have plan to update UAC1.0 to UAC2.0 in X-CUBE-AUDIO?