31
Hardware / Re: Anyone know a cheap USB audio standard 2.0 device (playback) ?
« on: February 21, 2021, 12:34:57 am »Can anyone point me to a "audio standard 2.0" device ? The very cheap devices usually implement "audio standard 1.0" but I need "audio standard 2.0" in order to test. Hopefully, I can find something that is not overly expensive.
Here is how you can find out about what you have:
1) get lsusb.exe. This tool allows you to list the complete descriptor contents of a USB device
2) run "lsusb.exe". It will list all attached devices with their vendorid:productid. You will have to guess what is what by attaching and detaching USB devices.
3) run "lsusb.exe -v -d vendorid:productid where "vendorid" and "productid" are the numbers from step 2.Pipe the tool output into a file.
4) in that file, search for something like this:
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 38
bInCollection 1
baInterfaceNr( 0) 1
If "bcdADC" says 1.00 then you have an audio standard 1.0 device. If it says 2.00, then you have an audio standard 2.0 device.
The problem is that if I search in Amazon or elsewhere, they never give that level of detail in their stupid product descriptions.
Anything that advertises Linux compatibility? The Linux kernel has not had usba1 compiled in as standard for at the least 6 years although some distributions like Ubuntu do supply kernels with usba1 enabled. As I am still on Firewire mostly I cannot help you as the only USB devices that I am certain of have usba2 are Micromega MyDAC and Arcam rPAC, both have switchable class compatibility but are relatively expensive, although the rPAC is frequently going cheap on eBay these days because it switches back to usba1 on every restart, which means incompatibility with modern Linux and Windows if you do not, or are not aware of how to switch it back.