Hi, Thanks for replying. I can use a some USB audio devices, ones based around the Ti PCM2704 are fine, the DAC I want to use is called an audiolab MDAC and as I said it has an elasticity buffer, this sits at 50% full and is rock solid, as it should do, on USB 2.0 devices under Ubuntu 12.04 LTS fully patched ASRock 330 but not on the 12.04 LTS fully patched Intel NUC, where it reaches a maximum of 20% is highly erratic and drops out from time to time. The lsmod output is as follows: snd_usb_audio 146849 1 snd_usbmidi_lib 29477 1 snd_usb_audio hid_generic 12540 0 snd_hda_codec_realtek 80192 1 snd_hda_codec_hdmi 37463 1 coretemp 13596 0 kvm_intel 137928 0 kvm 452238 1 kvm_intel ghash_clmulni_intel 13259 0 aesni_intel 55495 0 ablk_helper 13597 1 aesni_intel cryptd 20530 3 ghash_clmulni_intel,aesni_intel,ablk_helper lrw 13323 1 aesni_intel aes_x86_64 17255 1 aesni_intel xts 12951 1 aesni_intel gf128mul 14951 2 lrw,xts snd_hda_intel 44339 5 snd_hda_codec 141761 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel snd_hwdep 13668 2 snd_usb_audio,snd_hda_codec microcode 23075 0 snd_pcm 102477 4 snd_usb_audio,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec snd_seq_midi 13324 0 snd_rawmidi 30417 2 snd_usbmidi_lib,snd_seq_midi snd_seq_midi_event 14899 1 snd_seq_midi snd_seq 61930 2 snd_seq_midi,snd_seq_midi_event joydev 17613 0 rfcomm 47922 0 snd_timer 29989 2 snd_pcm,snd_seq snd_seq_device 14497 3 snd_seq_midi,snd_rawmidi,snd_seq bnep 18399 2 bluetooth 247324 10 rfcomm,bnep nuvoton_cir 17980 0 rc_core 26422 1 nuvoton_cir parport_pc 28284 1 ppdev 17113 0 i915 621562 3 snd 69533 24 snd_usb_audio,snd_usbmidi_lib,snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device drm_kms_helper 49597 1 i915 mac_hid 13253 0 drm 287796 4 i915,drm_kms_helper i2c_algo_bit 13564 1 i915 lpc_ich 17144 0 video 19652 1 i915 soundcore 12680 1 snd snd_page_alloc 18798 2 snd_hda_intel,snd_pcm mei 45974 0 binfmt_misc 17540 1 lp 17799 0 parport 46562 3 parport_pc,ppdev,lp hid_logitech 26634 0 ff_memless 13097 1 hid_logitech usbhid 47346 1 hid_logitech hid 105826 3 hid_generic,hid_logitech,usbhid ahci 25879 2 libahci 31636 1 ahci e1000e 202746 0 On 31 March 2014 22:02, Greg KH <greg@xxxxxxxxx> wrote: > On Mon, Mar 31, 2014 at 08:44:00AM +0200, Russel Hughes wrote: >> Hi, >> >> Does anyone know when isochronous audio will be implemented for >> USB 3.0 in Linux? > > What specific specification are you referring to that we do not already > support? > > I can use a USB audio device just fine with a USB 3.0 host at the > moment, what exact driver are you having problems with? > > thanks, > > greg k-h -- 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
