[uaudio] recording with jumpness

[MIHIRA Sanpei Yoshiro]

Hi.

  I recorded radio with ports/audio/wavplay(into wav file).
  But sometime jumpiness (20 times in 30min)

  I set ``rtprio 0'' (/usr/sbin/trprio), but is have only a small
effect(5-10 times n 30min).

  Please let me know how could I solve this problem.

[System]
FreeBSD-8-stable/amd64
Athlon(tm) Processor 1640B(2.7GHz)
(This system is private mail/web server..)

[Sound card]
USB Audio

FreeBSD Audio Driver (newpcm: 64bit 2009061500/amd64)
Installed devices:
pcm1: <USB audio> at ? kld snd_uaudio [MPSAFE] (1p:1v/1r:1v channels duplex)

dev.pcm.1.buffersize: 0

Cheers.
---
MIHIRA, Sanpei Yoshiro
Tokyo, Japan.