Hi Guys,

Just a quick update.

Having reported this issue to support this morning, as requested by CS, by late this afternoon (I'm working in London, so I'm around 8 hours ahead) I was sent a debug driver to test and an update which fixes this issue.

I am very impressed with Frontier Design Group's very rapid response in addressing this issue.

Best Wishes      Charles

Hi CS,

I have emailed support this morning. I included a link to this thread in case anyone else has some input.

I also retested, with exactly the same result, so completely reproducible here!

Best Regards      Charles

Hi CS,

Thanks for responding.

Yes, it happened twice, doing exactly the same set of operations (install AlphaTrack as an MCU control surface as per instructions in the manual and then try and use it). After that I removed AlphaTrack as a control surface for SoundTrack Pro for obvious reasons.


I have updated the AlphaTrack OS X driver today to version from 1.3.0 to 1.4.0 to use with Logic Pro 9.1.3 (32 bit and 64 bit versions).

Unfortunately when I set up SoundTrack Pro to use the AlphaTrack (this is for the first time, I haven't used the AlphaTrack with SoundTrack Pro before) although it installs the control surface as per the manual, as soon as I try to use the AlphaTrack to control anything in Soundtrack Pro the nasty grey curtain comes down accross the screen with the instruction that it is necessary to restart OS X (the worst type of crash).

Please could you investigate.

I have added the OS X Kernel Panic Report at the end of this post.

Best Regards      Charles

iMac 2.66GHz Intel Core 2 Duo, 4 GB RAM, OS X 10.64; Motu 828mkII; Logic Pro 9.13; Live 8.2.1; AlphaTrack Driver 1.4.0

OS X Crash Log:

Interval Since Last Panic Report:  3819265 sec
Panics Since Last Report:          2
Anonymous UUID:                    BF8161E6-8C49-4B47-959A-EBCFD4600DCE

Mon Nov  8 12:15:25 2010
panic(cpu 1 caller 0x51eb2d): "Kernel stack memory corruption detected"@/SourceCache/xnu/xnu-1504.7.4/libkern/stack_protector.c:57
Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)
0x511ebb68 : 0x21b455 (0x5cf328 0x511ebb9c 0x2238b1 0x0)
0x511ebbb8 : 0x51eb2d (0x5d50d0 0x816d804 0x511ebbf8 0x511ebbff)
0x511ebbd8 : 0x57ba27b7 (0x816d804 0x4 0x511ebbff 0x816dda8)
0x511ebc18 : 0x57ba29d0 (0x816dda8 0x816dda8 0x511ebc48 0x57b93a9c)
0x511ebc48 : 0x57ba4561 (0x816dda8 0x10 0x0 0x510bf5f7)
0x511ebc88 : 0x57b939cf (0x816dda8 0x1e 0x1 0x71a0600)
0x511ebcc8 : 0x57b9df8c (0x816d804 0x81fa550 0xc 0x0)
0x511ebce8 : 0x56f29458 (0x823c1c4 0x823c1c4 0x0 0x0)
0x511ebda8 : 0x5707a6cc (0x72e3000 0x7414900 0x0 0x0)
0x511ebe28 : 0x5707b4a2 (0x72e3000 0x7306818 0x0 0x0)
0x511ebea8 : 0x5707b607 (0x72e3000 0x0 0x0 0x0)
0x511ebed8 : 0x57073124 (0x72e3000 0x0 0x511ebf08 0x57072abc)
0x511ebf08 : 0x54884d (0x72e3000 0x0 0x1 0x29d54e)
0x511ebf58 : 0x54787e (0x73efa00 0x73e445c 0x511ebf88 0x227161)
0x511ebf88 : 0x547cd8 (0x73f3880 0x73e4440 0x0 0x5903)
0x511ebfc8 : 0x29e6cc (0x73f3880 0x0 0x10 0x9268600)
      Kernel Extensions in backtrace (with dependencies):
            dependency: com.apple.iokit.IOAudioFamily(1.7.6fc2)@0x57895000
            dependency: com.apple.iokit.IOUSBFamily(4.0.2)@0x56f24000
            dependency: com.apple.iokit.IOUSBFamily(4.0.2)@0x56f24000
            dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5105e000
            dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5105e000

BSD process name corresponding to current thread: kernel_task

Mac OS version:

Kernel version:
Darwin Kernel Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
System model name: iMac9,1 (Mac-F2218FA9)

System uptime in nanoseconds: 199625383113
unloaded kexts:
com.apple.driver.AppleFileSystemDriver    2.0 (addr 0x56e2b000, size 0x12288) - last unloaded 154378501508
loaded kexts:
com.vara.driver.VaraAudio    1.0.3
com.Cycling74.driver.Soundflower    1.5.2
com.motu.driver.FireWireAudio    1.5 41560
com.frontierdesign.iokit.alphatrack    1.4.0f1
com.paceap.kext.pacesupport.snowleopard    5.7.2
com.Logitech.Control Center.HID Driver    3.2.0
com.apple.driver.AppleHWSensor    1.9.3d0 - last loaded 45904610604
com.apple.driver.AGPM    100.12.12
com.apple.driver.AppleMikeyHIDDriver    1.2.0
com.apple.driver.AppleIntelPenrynProfile    17
com.apple.Dont_Steal_Mac_OS_X    7.0.0
com.apple.driver.AppleMikeyDriver    1.8.7f1
com.apple.driver.AppleHDA    1.8.7f1
com.apple.driver.AudioAUUC    1.4
com.apple.driver.AppleUpstreamUserClient    3.3.2
com.apple.driver.AudioIPCDriver    1.1.2
com.apple.nvenet    2.0.15
com.apple.driver.AirPortBrcm43xx    423.91.27
com.apple.driver.AppleBacklight    170.0.24
com.apple.GeForce    6.1.8
com.apple.driver.ACPI_SMC_PlatformPlugin    4.1.2b1
com.apple.driver.AppleLPC    1.4.12
com.apple.filesystems.autofs    2.1.0
com.apple.driver.AppleIRController    303.8
com.apple.iokit.SCSITaskUserClient    2.6.5
com.apple.iokit.IOAHCIBlockStorage    1.6.2
com.apple.driver.AppleUSBHub    4.0.0
com.apple.driver.AppleUSBEHCI    4.0.2
com.apple.driver.AppleAHCIPort    2.1.2
com.apple.BootCache    31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
com.apple.driver.AppleFWOHCI    4.7.1
com.apple.driver.AppleEFINVRAM    1.3.0
com.apple.driver.AppleUSBOHCI    3.9.6
com.apple.driver.AppleRTC    1.3.1
com.apple.driver.AppleHPET    1.5
com.apple.driver.AppleACPIButtons    1.3.2
com.apple.driver.AppleSMBIOS    1.6
com.apple.driver.AppleACPIEC    1.3.2
com.apple.driver.AppleAPIC    1.4
com.apple.driver.AppleIntelCPUPowerManagementClient    105.10.0
com.apple.security.sandbox    0
com.apple.security.quarantine    0
com.apple.nke.applicationfirewall    2.1.11
com.apple.driver.AppleIntelCPUPowerManagement    105.10.0
com.apple.driver.AppleProfileReadCounterAction    17
com.apple.driver.AppleProfileTimestampAction    10
com.apple.driver.AppleProfileThreadInfoAction    14
com.apple.driver.AppleProfileRegisterStateAction    10
com.apple.driver.AppleProfileKEventAction    10
com.apple.driver.AppleProfileCallstackAction    20
com.apple.iokit.IOSurface    74.0
com.apple.iokit.IOBluetoothSerialManager    2.3.3f8
com.apple.iokit.IOSerialFamily    10.0.3
com.apple.driver.DspFuncLib    1.8.7f1
com.apple.driver.AppleSMBusController    1.0.8d0
com.apple.driver.AppleHDAController    1.8.7f1
com.apple.iokit.IOHDAFamily    1.8.7f1
com.apple.nvidia.nv50hal    6.1.8
com.apple.iokit.IOFireWireIP    2.0.3
com.apple.driver.AppleUSBAudio    2.7.3f1
com.apple.iokit.IOAudioFamily    1.7.6fc2
com.apple.kext.OSvKernDSPLib    1.3
com.apple.iokit.AppleProfileFamily    41
com.apple.NVDAResman    6.1.8
com.apple.iokit.IONDRVSupport    2.1
com.apple.iokit.IOGraphicsFamily    2.1
com.apple.iokit.IO80211Family    311.1
com.apple.iokit.IONetworkingFamily    1.9
com.apple.driver.NVSMU    2.2.7
com.apple.driver.AppleSMC    3.0.1d2
com.apple.driver.IOPlatformPluginFamily    4.1.2b1
com.apple.driver.AppleSMBusPCI    1.0.8d0
com.apple.driver.AppleUSBHIDMouse    1.4.0d7
com.apple.driver.AppleHIDMouse    1.4.0d7
com.apple.driver.AppleUSBHIDKeyboard    1.2.0a3
com.apple.driver.AppleHIDKeyboard    1.2.0a3
com.apple.driver.BroadcomUSBBluetoothHCIController    2.3.3f8
com.apple.driver.AppleUSBBluetoothHCIController    2.3.3f8
com.apple.iokit.IOBluetoothFamily    2.3.3f8
com.apple.iokit.IOUSBHIDDriver    4.0.2
com.apple.driver.AppleUSBMergeNub    4.0.0
com.apple.driver.AppleUSBComposite    3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice    2.6.5
com.apple.iokit.IOBDStorageFamily    1.6
com.apple.iokit.IODVDStorageFamily    1.6
com.apple.iokit.IOCDStorageFamily    1.6
com.apple.driver.XsanFilter    402.1
com.apple.iokit.IOAHCISerialATAPI    1.2.4
com.apple.iokit.IOSCSIArchitectureModelFamily    2.6.5
com.apple.iokit.IOUSBUserClient    4.0.0
com.apple.iokit.IOAHCIFamily    2.0.4
com.apple.iokit.IOFireWireFamily    4.2.6
com.apple.iokit.IOUSBFamily    4.0.2
com.apple.driver.AppleEFIRuntime    1.3.0
com.apple.iokit.IOHIDFamily    1.6.4
com.apple.iokit.IOSMBusFamily    1.1
com.apple.security.TMSafetyNet    6
com.apple.kext.AppleMatch    1.0.0d1
com.apple.driver.DiskImages    283
com.apple.iokit.IOStorageFamily    1.6.1
com.apple.driver.AppleACPIPlatform    1.3.2
com.apple.iokit.IOPCIFamily    2.6
com.apple.iokit.IOACPIFamily    1.3.0
Model: iMac9,1, BootROM IM91.008D.B08, 2 processors, Intel Core 2 Duo, 2.66 GHz, 4 GB, SMC 1.45f0
Graphics: NVIDIA GeForce 9400, NVIDIA GeForce 9400, PCI, 256 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (
Bluetooth: Version 2.3.3f8, 2 service, 19 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Network Service: AirPort, AirPort, en1
Serial ATA Device: Hitachi HDT721064SLA360, 596.17 GB
Serial ATA Device: HL-DT-ST DVDRW  GA11N
USB Device: USB2.0 Hub, 0x05e3  (Genesys Logic, Inc.), 0x0608, 0x26400000
USB Device: Vendor-Specific Device, 0x1220, 0x0001, 0x26440000
USB Device: USB2.0 Hub, 0x05e3  (Genesys Logic, Inc.), 0x0608, 0x26410000
USB Device: SL MkII, 0x1235, 0x000b, 0x26414000
USB Device: CP33, 0x0499  (Yamaha Corporation), 0x1041, 0x26413000
USB Device: cme, 0x0227, 0x0227, 0x26412000
USB Device: Built-in iSight, 0x05ac  (Apple Inc.), 0x8502, 0x24400000
USB Device: Keyboard Hub, 0x05ac  (Apple Inc.), 0x1006, 0x24300000
USB Device: Apple Optical USB Mouse, 0x05ac  (Apple Inc.), 0x0304, 0x24330000
USB Device: Apple Keyboard, 0x05ac  (Apple Inc.), 0x0221, 0x24320000
USB Device: USB2.0 Hub, 0x05e3  (Genesys Logic, Inc.), 0x0608, 0x24100000
USB Device: USB Trackball, 0x046d  (Logitech Inc.), 0xc408, 0x24140000
USB Device: eLicenser, 0x0819, 0x0101, 0x24130000
USB Device: iLok, 0x088e, 0x5036, 0x24120000
USB Device: BRCM2046 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x06100000
USB Device: Bluetooth USB Host Controller, 0x05ac  (Apple Inc.), 0x8215, 0x06110000
USB Device: IR Receiver, 0x05ac  (Apple Inc.), 0x8242, 0x04500000
FireWire Device: Vendor 0x1F2 Device 0x101800, 0x1F2, Up to 400 Mb/sec