Re: [PATCH] ALSA: usb-audio: Add Hiby R3 to quirks for native DSD support

From: Jussi Laako
Date: Mon Aug 26 2019 - 13:18:49 EST

+ /* ESS Sabre based USB DACs */
+ case USB_ID(0xc502, 0x0051): /* Hiby R3 */
+ if (fp->altsetting == 4)
+ break;

Do you know who's vendor id is this? ESS Sabre is a DAC chip with I2S input, I'm not aware of any product from ESS under Sabre brand that would include USB interface. (?) So likely the USB interface is sourced from somewhere else...

It is good to check with "lsusb -vvv" if the device flags DSD altsetting as raw. Then you know it'll work with the auto-detection code and doesn't break so easily if firmware update changes altsettings (not uncommon to happen).

- Jussi