Feature Request: UAC1 Support

[autumn-512]

Hi, thank you for all your hard work developing this. I have a feature I'd like to request if it sounds possible. Many video game consoles such as the Playstation 5 only support UAC1 output, and will not connect to UAC2 devices at all. Would it be possible to add a toggle to force UAC1 mode on the walkman instead of UAC2?

[zhangboyang]

Hi, llusbdac uses "asynchronous isochronous audio endpoints" to transfer audio data, and "isochronous feedback endpoint" to send feedback to host. Although these feature exist in UAC1, I doubt whether PS5 support these particular UAC1 features. If PS5 doesn't support asynchronous transfer and isochronous feedback, llusbdac still can't be used.