USB Audio的问题（ALSA）

wwxbei

最近在调试一个USB声卡(E-MU 0204 USB),  播放音频时出现以下错误（蓝色部分）， 看起来像是USB数据传输出现错误。
因为对ALSA不熟， 不知道这种错误是ALSA配置的问题还是USBaudio驱动的问题， 请各位指点一二，谢谢！
[   29.400000] NT72558-port1-ehci -port1-ehci.0: submit_async 1.1 urb 86f69200 ep0out len 0, qtd a6d6e060 [qh a6d6d180]
[   29.412000] NT72558-port1-ehci -port1-ehci.0: irq status c009 Async Periodic FLR INT
[   29.412000] NT72558-port1-ehci -port1-ehci.0: ehci_urb_done 1.1 urb 86f69200 ep0out status 0 len 0/0
[   29.428000] NT72558-port1-ehci -port1-ehci.0: irq status c028 Async Periodic IAA FLR
[   29.444000] ALSA sound/usb/usbaudio.c:1403: setting usb interface 1:3
[   29.448000] NT72558-port1-ehci -port1-ehci.0: itd_submit 1.1 urb 86fa8900 ep1out len 2304, 8 pkts 8 uframes [8645c700]
[   29.460000] NT72558-port1-ehci -port1-ehci.0: schedule devp 1.1 ep1out-iso period 8 start 241.0
[   29.472000] NT72558-port1-ehci -port1-ehci.0: itd_submit 1.1 urb 86fa8a00 ep1out len 2304, 8 pkts 8 uframes [8645c700]
[   29.484000] NT72558-port1-ehci -port1-ehci.0: irq status c009 Async Periodic FLR INT
[   29.492000] -port1-ehci NT72558-port1-ehci.0: request 86fa8a00 would overflow (65504+64>8192)
[   29.500000] ALSA sound/usb/usbaudio.c:872: cannot submit datapipe for urb 1, error -27: internal error
ALSA lib pcm_direct.c:980snd1_pcm_direct_initialize_slave) unable to install hw params
ALSA lib pcm_dmix.c:1030snd_pcm_dmix_open) unable to initialize slave
[   30.508000] ALSA sound/usb/usbaudio.c:924: timeout: still 1 active urbs..
[   30.512000] NT72558-port1-ehci -port1-ehci.0: submit_async 1.1 urb 86f29200 ep0out len 0, qtd a6d6e2a0 [qh a6d6d180]
[   30.524000] NT72558-port1-ehci -port1-ehci.0: irq status c009 Async Periodic FLR INT
[   30.524000] NT72558-port1-ehci -port1-ehci.0: ehci_urb_done 1.1 urb 86f29200 ep0out status 0 len 0/0
[   30.544000] NT72558-port1-ehci -port1-ehci.0: irq status c028 Async Periodic IAA FLR

jiaxi

[   29.492000] -port1-ehci NT72558-port1-ehci.0: request 86fa8a00 would overflow (65504+64>8192)
[   29.500000] ALSA sound/usb/usbaudio.c:872: cannot submit datapipe for urb 1, error -27: internal error