stack trace for thread 149 "multi_audio audio output"
    kernel stack: 0x832d1000 to 0x832d5000
      user stack: 0x700c3000 to 0x70103000
frame               caller     <image>:function + offset
 0 832d4930 (+  48) 8005bd3d   <kernel_x86>:invoke_debugger_command + 0x00f5
 1 832d4960 (+  64) 8005bb2d   <kernel_x86> invoke_pipe_segment(debugger_command_pipe*: 0x80122a60, int32: 0, 0x0 "<NULL>") + 0x0079
 2 832d49a0 (+  64) 8005beb4   <kernel_x86>:invoke_debugger_command_pipe + 0x009c
 3 832d49e0 (+  48) 8005d43c   <kernel_x86> ExpressionParser<0x832d4a94>::_ParseCommandPipe(0x832d4a90) + 0x0234
 4 832d4a10 (+  64) 8005c876   <kernel_x86> ExpressionParser<0x832d4a94>::EvaluateCommand(0x80112ca0 "bt", 0x832d4a90) + 0x02ba
 5 832d4a50 (+ 224) 8005e864   <kernel_x86>:evaluate_debug_command + 0x0088
 6 832d4b30 (+  64) 80059c52   <kernel_x86> kernel_debugger_loop() + 0x01ae
 7 832d4b70 (+  32) 8005aabd   <kernel_x86>:kernel_debugger + 0x004d
 8 832d4b90 (+ 192) 8005aa65   <kernel_x86>:panic + 0x0029
 9 832d4c50 (+  48) 800ca7e2   <kernel_x86>:page_fault_exception + 0x008e
10 832d4c80 (+  12) 800cdf16   <kernel_x86>:int_bottom + 0x0036
kernel iframe at 0x832d4c8c (end = 0x832d4cdc)
 eax 0x1            ebx 0x832afa14      ecx 0x81113618   edx 0x832b02e0
 esi 0x81113708     edi 0x70102f24      ebp 0x832d4cf4   esp 0x832d4cc0
 eip 0x832ad165  eflags 0x10046
 vector: 0xe, error code: 0x2
11 832d4c8c (+ 104) 832ad165   </boot/beos/system/add-ons/kernel/drivers/dev/audio/hmulti/auich>:auich_buffer_exchange + 0x00f9
12 832d4cf4 (+  48) 832ad2ee   </boot/beos/system/add-ons/kernel/drivers/dev/audio/hmulti/auich>:auich_multi_control + 0x0116
13 832d4d24 (+  48) 832ad655   </boot/beos/system/add-ons/kernel/drivers/dev/audio/hmulti/auich>:auich_control + 0x0029
14 832d4d54 (+ 320) 8006a533   <kernel_x86> devfs_ioctl(fs_volume*: 0x81014284, fs_vnode*: 0x810e650c, 0x810705b0, uint32: 0x1f66 (8038), 0x70102f24, uint32: 0x58 (88)) + 0x0217
15 832d4e94 (+  64) 80098688   <kernel_x86> common_ioctl(file_descriptor*: 0x81104fa0, uint32: 0x1f66 (8038), 0x70102f24, uint32: 0x58 (88)) + 0x0038
16 832d4ed4 (+  48) 80086973   <kernel_x86> fd_ioctl(false, int32: 16, uint32: 0x1f66 (8038), 0x70102f24, uint32: 0x58 (88)) + 0x005f
17 832d4f04 (+  64) 80087745   <kernel_x86>:_user_ioctl + 0x0051
18 832d4f44 (+ 100) 800ce142   <kernel_x86>:handle_syscall + 0x00af
user iframe at 0x832d4fa8 (end = 0x832d5000)
 eax 0x85           ebx 0x5ca560        ecx 0x70102e30   edx 0xffff0104
 esi 0x10           edi 0x180474a8      ebp 0x70102e5c   esp 0x832d4fdc
 eip 0xffff0104  eflags 0x216      user esp 0x70102e30
 vector: 0x63, error code: 0x0
19 832d4fa8 (+   0) ffff0104   <commpage>:commpage_syscall + 0x0004
70102e5c -- read fault
kdebug>