Comments (3)
The workaround is to fix the issue that Windows OS (like Windows 10) does not comply with the USB Audio 2.0 spec. Although we still not get the official confirm about this finding from MSFT, but we provide a solution related to the macro USB_DEVICE_WORKAROUND_AUDIO_20_WINDOWS. This macro is disabled by default. User need to enable this macro manually if the environment meet the 3 conditions:
1. device is full speed running audio 2.0
2. usb host is Windows OS that supports USB audio 2.0, like Win 10
3. use feedback endpoint
We can make sure that our case can work on the OS that totally comply with USB audio spec no matter audio 1.0 or audio 2.0, but we can not meet not meet the requirement for cross-platform working based on the wrong behavior of Windows OS itself, sorry about this.
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thanks for reply, we're aware of audio-class is broken on windows resulting in most sound-card vendors choose to provide their own drivers as a workaround... wish we could have Microsoft jump in an resolve this once and for all including driverless multi-channel support.
so it is possible to run stereo in & out on both macOS and Windows10/11 driverless as long as we make use of the high-speed phy, correct!?
I will have to try again on the LPC55 ev-kit as I'm not sure if I tested using the FS or HS phy
- what would be the most recent / mature example project that we can test?
- is there an example that uses HS that also supports hubs?
- do you happen to have a test-protocol of what platforms and OS'es this implementation has been verified against?
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Yes, if you use USB HS then you can ignore this issue on Windows 10/11.
For your last 3 questions:
- You can use the recently released 2.15.0 SDK from https://mcuxpresso.nxp.com
- If you use LPCxpresso55s69 and LPCxpresso55s16, you can use the HS port except for the FS port. About hub, I am not sure what your purpose is, so sorry that I can not give more comments.
- Previously I tested the usb_hid_audio_unified case on Linux/Mac OS/Windows, actually the aim is not only for the test-protocol.
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Related Issues (13)
- evkmimx8mm: missing pinmux call HOT 4
- Merge Freertos and fsl_assert.c assert approach HOT 5
- USB audio examples lpc54114 and RT600 HOT 4
- Release examples in csolution format HOT 1
- The RDC example does not work on evkmimx8mp HOT 3
- Please add License File to this repo HOT 1
- Can't find any examples for K32W148
- Bluetooth applications removed from evkmimxrt1060 examples
- Multicore armgcc examples "cannot" be built. HOT 6
- rt1170-EVK Error 404 uSD Jumpers not found. HOT 7
- rt1170 m4 swd armgcc examples not working if not used basic debug/release target (e.g sdram debug/release or flexspi_nor debug/release target is used). HOT 13
- RT1170-EVK - Bluetooth not working with AW-AM457MA-D module HOT 2
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