Veronica Merryfield wrote:
The 100 Hz (being 2x 50Hz, the power freq. in Italy)
suggests that it is probably related to some manner of
power supply. However, I have no theory why we're
getting 2x 50Hz (and I think I need one :-)).
The implication has been that the USB audio device is a cheaper device. It is
therefore more likely that the device runs from the USB 5 volt line than have a
separate power supply, and that 5v line is regulated and therefore less likely
to have a power line ripple on it.
USB power source very often breaks down and regulation isn't filtering.
_______________________________________________
Linux-audio-dev mailing list
[email protected]
http://lists.linuxaudio.org/listinfo/linux-audio-dev
