> > Kernel version is 4.9.68 (https://github.com/raspberrypi/linux , > > commit d5a3b4cab0c8eacc93e58cfa1bdbd259399caedd), the wTotalLength > > calc error is present in latest version also > > > (https://github.com/torvalds/linux/blob/master/drivers/usb/gadget/functio > n/f_uac2.c#L219) > > 4.9 is over a year old, can you try 4.14, or even better yet, 4.15? Ok, I'll try that. Meanwhile relaying information from the windows audio driver list (from Matthew van Eerde): "Wait, never mind – I recognize that failing status code. usbaudio2.sys is complaining that you have an asynchronous data OUT endpoint but it can’t find a corresponding feedback endpoint." Unfortunately I have no idea what that means. Yet 😊 , but putting it out there in case someone else does. Regards /Robert ��.n��������+%������w��{.n�����{���)��jg��������ݢj����G�������j:+v���w�m������w�������h�����٥