I was wondering about my DAC that I got from Wyred4Sound, the DAC2 model...here it is the info about the USB driver and it seems to me that it is NOT ASYNC...but I know very little about this topic, so I'd like someone else to comment on this
Information for device W4S 24-192 Interface (VID=0x04B4 PID=0x931C):
Version of TDD: 1.34 Date: Sep 7 2011 Time: 08:44:13
Connection Information:
------------------------------
Connection status: Device connected
Device actual bus speed: High
Device is hub: No
Device adress: 0x0001
Current configuration value: 0x00
Number of open pipes: 1
Device Descriptor:
------------------------------
Value Valuename
0x12 bLength
0x01 bDescriptorType
0x0200 bcdUSB
0xFF bDeviceClass (Vendor specific)
0xFF bDeviceSubClass
0xFF bDeviceProtocol
0x40 bMaxPacketSize0 (64 Bytes)
0x04B4 idVendor
0x931C idProduct
0x0001 bcdDevice
0x01 iManufacturer (Wyred4Sound)
0x02 iProduct (W4S 24-192 Interface)
0x00 iSerialNumber
0x01 bNumConfigurations
Hex dump:
0x12 0x01 0x00 0x02 0xFF 0xFF 0xFF 0x40 0xB4 0x04
0x1C 0x93 0x01 0x00 0x01 0x02 0x00 0x01
Device Qualifier Descriptor:
------------------------------
Value Valuename
0x0A bLength
0x06 bDescriptorType
0x0200 bcdUSB
0xFF bDeviceClass (Vendor specific)
0xFF bDeviceSubClass
0xFF bDeviceProtocol
0x40 bMaxPacketSize0 (64 Bytes)
0x01 bNumConfigurations
0x00 bReserved
Hex dump:
0x0A 0x06 0x00 0x02 0xFF 0xFF 0xFF 0x40 0x01 0x00
Configuration Descriptor:
------------------------------
Value Valuename
0x09 bLength
0x02 bDescriptorType
0x0019 wTotalLength
0x01 bNumInterfaces
0x00 bConfigurationValue
0x00 iConfiguration
0x60 bmAttributes (Self-powered Device, Remote-Wakeup)
0x32 MaxPower (100 mA)
Hex dump:
0x09 0x02 0x19 0x00 0x01 0x00 0x00 0x60 0x32
Interface Descriptor:
------------------------------
Value Valuename
0x09 bLength
0x04 bDescriptorType
0x00 bInterfaceNumber
0x00 bAlternateSetting
0x01 bNumEndPoints
0xFF bInterfaceClass (Vendor specific)
0xFF bInterfaceSubClass
0xFF bInterfaceProtocol
0x00 iInterface
Hex dump:
0x09 0x04 0x00 0x00 0x01 0xFF 0xFF 0xFF 0x00
Endpoint Descriptor:
------------------------------
Value Valuename
0x07 bLength
0x05 bDescriptorType
0x02 bEndpointAddress (Out-Endpoint)
0x02 bmAttributes
Transfer Type: Bulk-Transfer
Synchronization Type: None
Usage Type: Data
0x0200 wMaxPacketSize (512 Bytes)
0x00 bIntervall
Hex dump:
0x07 0x05 0x02 0x02 0x00 0x02 0x00
Configuration Descriptor:
------------------------------
Value Valuename
0x09 bLength
0x02 bDescriptorType
0x0019 wTotalLength
0x01 bNumInterfaces
0x01 bConfigurationValue
0x00 iConfiguration
0x80 bmAttributes (Bus-powered Device)
0x32 MaxPower (100 mA)
Hex dump:
0x09 0x02 0x19 0x00 0x01 0x01 0x00 0x80 0x32
Interface Descriptor:
------------------------------
Value Valuename
0x09 bLength
0x04 bDescriptorType
0x00 bInterfaceNumber
0x00 bAlternateSetting
0x01 bNumEndPoints
0xFF bInterfaceClass (Vendor specific)
0xFF bInterfaceSubClass
0xFF bInterfaceProtocol
0x00 iInterface
Hex dump:
0x09 0x04 0x00 0x00 0x01 0xFF 0xFF 0xFF 0x00
Endpoint Descriptor:
------------------------------
Value Valuename
0x07 bLength
0x05 bDescriptorType
0x04 bEndpointAddress (Out-Endpoint)
0x01 bmAttributes
Transfer Type: Isochronous-Transfer
Synchronization Type: None
Usage Type: Data
0x0200 wMaxPacketSize (512 Bytes)
0x00 bIntervall
Hex dump:
0x07 0x05 0x04 0x01 0x00 0x02 0x00
Whole Device Descriptor as hex dump:
0x12, 0x01, 0x00, 0x02, 0xFF, 0xFF, 0xFF, 0x40, 0xB4, 0x04,
0x1C, 0x93, 0x01, 0x00, 0x01, 0x02, 0x00, 0x01
Whole Device Qualifier Descriptor as hex dump:
0x0A, 0x06, 0x00, 0x02, 0xFF, 0xFF, 0xFF, 0x40, 0x01, 0x00
Whole Configuration Descriptor as hex dump:
0x09, 0x02, 0x19, 0x00, 0x01, 0x00, 0x00, 0x60, 0x32, 0x09,
0x04, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xFF, 0x00, 0x07, 0x05,
0x02, 0x02, 0x00, 0x02, 0x00
Whole Configuration Descriptor as hex dump:
0x09, 0x02, 0x19, 0x00, 0x01, 0x01, 0x00, 0x80, 0x32, 0x09,
0x04, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xFF, 0x00, 0x07, 0x05,
0x04, 0x01, 0x00, 0x02, 0x00
Connectionpath for device:
Intel(R) ICH9 Family USB2 Enhanced Host Controller - 293A
RootHub
W4S 24-192 Interface (VID=0x04B4 PID=0x931C)