03-08-2020, 01:57 PM
@TheOldPresbyope
Further reading has identified an interesting issue about the Pi-4 USB support. First, some USB audio devices identify themselves as HIDs even though they are not actually a human interface device. Secondly, there has been a firmware bug in the EEPROM of some Pi-4s that causes problems with HIDs in general. I plugged the soundKey into a Windows 10 PC and it does correctly identify itself as an audio device, rather than an HID, in Device Manager.
In spite of that reassurance, I went ahead and performed an update of the Pi-4 EEPROM to version 000137ad in the hope of a cure. No such luck, I'm afraid.
The Pi-2B which I ordered yesterday from eBay should arrive on Wednesday.
Many thanks for your interest in this problem and for your help. Much appreciated.
Further reading has identified an interesting issue about the Pi-4 USB support. First, some USB audio devices identify themselves as HIDs even though they are not actually a human interface device. Secondly, there has been a firmware bug in the EEPROM of some Pi-4s that causes problems with HIDs in general. I plugged the soundKey into a Windows 10 PC and it does correctly identify itself as an audio device, rather than an HID, in Device Manager.
In spite of that reassurance, I went ahead and performed an update of the Pi-4 EEPROM to version 000137ad in the hope of a cure. No such luck, I'm afraid.
The Pi-2B which I ordered yesterday from eBay should arrive on Wednesday.
Many thanks for your interest in this problem and for your help. Much appreciated.
