[LAU] [LAD] How to change the USB bus sample rate ?

Clemens Ladisch cladisch at fastmail.net
Tue Aug 12 03:16:50 EDT 2008

Adrien DANIEL wrote:
> I read somewhere that it was possible to change the USB bus

"universal serial bus bus"?  ;-)

> sample rate.

USB doesn't have a built-in sample rate; audio samples are transported
in packets.

USB does have a bit rate and a frame rate, but neither of these can be
changed.  The only exception is the frame rate on UHCI controllers; to
change the frame length, change the initialization of the USBSOF
register in the configure_hc() function in uhci-hcd.c.

Why would you want to do this?


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