If the audio device is busy the appletviewer will coredump. Here is a backtrace:

> appletviewer http://www/
Warning: <app> tag no longer supported, use <applet> instead:
<applet codebase="doc:/demo/" code="AudioItem.class" width=100 height=100>
<param name=snd value="audio/harp.au">
</applet>

thread applet-AudioItem find class AudioItem
Opening stream to: http://www/applets/AudioItem/AudioItem.class to get AudioItem
audio device busy (attempt 1 out of 5)
audio device busy (attempt 2 out of 5)
audio device busy (attempt 3 out of 5)
audio device busy (attempt 4 out of 5)
audio device busy (attempt 5 out of 5)
audio device busy (attempt 1 out of 5)
SIGSEGV 11* segmentation violation
    si_signo [11]: SIGSEGV 11* segmentation violation
    si_errno [0]: Error 0
    si_code [1]: SEGV_ACCERR [addr: 0x0]

        stackbase=EE012000, stackpointer=EE010DE8

Full thread dump:
    "Audio Player" (TID:0xee704b48, sys_thread_t:0xee011de8) prio=10 *current thread*
        sun.audio.AudioDevice.play(AudioDevice.java:344)
        sun.audio.AudioPlayer.run(AudioPlayer.java:135)
    "thread applet-AudioItem" (TID:0xee703498, sys_thread_t:0xee041de8) prio=6
        java.lang.Object.wait(Object.java)
        sun.applet.AppletPanel.getNextEvent(AppletPanel.java:154)
        sun.applet.AppletPanel.run(AppletPanel.java:174)
        java.lang.Thread.run(Thread.java)
    "Screen Updater" (TID:0xee7019c8, sys_thread_t:0xee071de8) prio=4
        java.lang.Object.wait(Object.java)
        sun.awt.ScreenUpdater.nextEntry(ScreenUpdater.java:75)
        sun.awt.ScreenUpdater.run(ScreenUpdater.java:95)
    "AWT-Motif" (TID:0xee701518, sys_thread_t:0xee0a1de8) prio=5
        java.lang.Thread.run(Thread.java)
    "AWT-Input" (TID:0xee7014f8, sys_thread_t:0xee0d1de8) prio=5
    "Finalizer thread" (TID:0xee700348, sys_thread_t:0xee3f1de8) prio=1
    "Async Garbage Collector" (TID:0xee7002f8, sys_thread_t:0xef441de8) prio=1
    "Idle thread" (TID:0xee700288, sys_thread_t:0xef471de8) prio=0
    "clock handler" (TID:0xee7000d0, sys_thread_t:0xef551de8) prio=11
    "main" (TID:0xee7000a0, sys_thread_t:0x72a10) prio=5
Monitor Cache Dump:
    unknown key (key=0xef441de8): unowned
        Waiting to be notified:
            "Async Garbage Collector"
    sun.awt.motif.MToolkit@EE7014E0/EE737900 (key=0xee7014e0): unowned
        Waiting to be notified:
            "AWT-Motif"
    sun.applet.AppletViewerPanel@EE703358/EE73D8C8 (key=0xee703358): unowned
        Waiting to be notified:
            "thread applet-AudioItem"
    sun.audio.AudioDevice@EE704B90/EE73F0B8 (key=0xee704b90): monitor owner: "Audio Player"
    sun.awt.ScreenUpdater@EE7019C8/EE7384A0 (key=0xee7019c8): unowned
        Waiting to be notified:
            "Screen Updater"
Registered Monitor Dump:
    Finalize me queue lock: unowned
        Waiting to be notified:
            "Finalizer thread"
    Thread queue lock: unowned
        Waiting to be notified:
            "main"
    Class lock: unowned
    Java stack lock: unowned
    Code rewrite lock: unowned
    Heap lock: unowned
    Has finalization queue lock: unowned
    Monitor IO lock: unowned
    Child death monitor: unowned
    Event monitor: unowned
    I/O monitor: monitor owner: "AWT-Input"
    Alarm monitor: unowned
        Waiting to be notified:
            "clock handler"
    Sbrk lock: unowned
    Monitor cache lock: unowned
    Monitor registry: monitor owner: "Audio Player"
Thread Alarm Q:
    sys_thread_t 0xef441de8 [Timeout in 416 ms]
IOT trap (core dumped)
Exit 134