A customer has an audio-related problem with the JRE 1.5.0_15 on Windows XP SP2.

There is an intermittent audio operation delay (around 8 seconds) if a RS-232C
communication program is running on the same PC. The customer has also seen the
symptom when there was some USB I/O.

By enabling the Java level debugging, it seems that the medod called com/sun/media/sound/DirectAudioDevice$DirectDL.implOpen()
takes up to 8 secs. Here is a snippet from customer's logs:

...
thread 174 49millis: > AbstractDataLine.open(format, bufferSize) (class: com.sun.media.sound.DirectAudioDevice$DirectClip
thread 174 49millis: need to open the mixer...
thread 174 49millis: DirectAudioDevice: implOpen - void method
thread 174 50millis: >> DirectDL: implOpen(PCM_SIGNED 11025.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian, 22050 bytes)
thread 174 50millis: DirectAudioDevice: got 2 controls.
thread 174 8322millis: << DirectDL: implOpen() succeeded
...