On Wed, 22 Apr 2009, Salvatore Lionetti wrote: > Hi > > Many thanks for your attention. > > - The controller is HS only, so FS device like http://www.trust.com/products/product.aspx?artnr=14134 i'm using is not recognized at all without hub, > - When i start submit urb for recording, no other kind of urb is/'ll be started before got error. Moreover the playback bandwidth is 4 times higher than record one, since there exist 4 stero output ch. Follow the layout of isoc urb: > o Playback urb: 1 packet, 704 bytes each (44 sample, 4ch, 16bit, stereo) > o Record urb: 1 packet, 200 bytes each (100 sample, 1ch, 16bit, stereo) > Is possible to saturate bus with Record and not for Playback direction? Can you post the "lsusb -v" output for your audio device, and also usbmon traces showing what happens during playback and recording? If your description is accurate, recording should not saturate the bus. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
