For what it's worth, the error I get when I try to use the plugin with Logic is as follows:
validating Audio Unit OwlSim by RebelTech:
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
AU Validation Tool
Version: 1.6.1a1
Copyright 2003-2011, Apple, Inc. All Rights Reserved.
Specify -h (-help) for command options
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
--------------------------------------------------
VALIDATING AUDIO UNIT: 'aumf' - 'OwlS' - 'RBLT'
--------------------------------------------------
Manufacturer String: RebelTech
AudioUnit Name: OwlSim
Component Version: 1.0.0 (0x10000)
* * PASS
--------------------------------------------------
TESTING OPEN TIMES:
COLD:
JUCE v2.0.40
Patch: Gain
Patch: Parametric EQ
Patch: Simple Delay
Patch: Template
Time to open AudioUnit: 9.604 ms
WARM:
Patch: Gain
Patch: Parametric EQ
Patch: Simple Delay
Patch: Template
Time to open AudioUnit: 0.039 ms
FIRST TIME:
Time for initialization: 0.010 ms
* * PASS
--------------------------------------------------
VERIFYING DEFAULT SCOPE FORMATS:
Input Scope Bus Configuration:
Default Bus Count:1
Default Format: AudioStreamBasicDescription: 1 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved
Output Scope Bus Configuration:
Default Bus Count:1
Default Format: AudioStreamBasicDescription: 1 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved
* * PASS
--------------------------------------------------
VERIFYING REQUIRED PROPERTIES:
VERIFYING PROPERTY: Sample Rate
ca_debug_string: AudioUnitGetProperty: *ioDataSize == 0 on entry /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUPlugInDispatch.cpp:118
PASS
VERIFYING PROPERTY: Stream Format
ca_debug_string: AudioUnitGetProperty: *ioDataSize == 0 on entry /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUPlugInDispatch.cpp:118
PASS
VERIFYING PROPERTY: Maximum Frames Per Slice
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:391
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:391
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:391
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:391
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:391
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:391
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:391
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:391
PASS
VERIFYING PROPERTY: Last Render Error
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:397
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:397
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:397
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:397
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:397
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:397
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:397
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:397
PASS
* * PASS
--------------------------------------------------
VERIFYING RECOMMENDED PROPERTIES:
VERIFYING PROPERTY: Latency
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:376
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:376
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:376
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:376
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:376
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:376
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:376
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:376
PASS
VERIFYING PROPERTY: Tail Time
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:382
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:382
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:382
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:382
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:382
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:382
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:382
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:382
PASS
VERIFYING PROPERTY: Bypass Effect
PASS
* * PASS
--------------------------------------------------
VERIFYING OPTIONAL PROPERTIES:
VERIFYING PROPERTY Supported Number of Channels
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:404
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:404
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:404
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:404
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:404
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:404
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:404
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:404
PASS
VERIFYING PROPERTY Host Callbacks
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:489
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:489
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:489
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:489
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:489
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:489
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:489
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:489
PASS
VERIFYING PROPERTY Instrument Count
PASS
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/OtherBases/AUMIDIBase.cpp:95
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/OtherBases/AUMIDIBase.cpp:95
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/OtherBases/AUMIDIBase.cpp:95
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/OtherBases/AUMIDIBase.cpp:95
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/OtherBases/AUMIDIBase.cpp:95
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/OtherBases/AUMIDIBase.cpp:95
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/OtherBases/AUMIDIBase.cpp:95
ca_require: inScope == kAudioUnitScope_Global InvalidScope /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/OtherBases/AUMIDIBase.cpp:95
* * PASS
--------------------------------------------------
VERIFYING SPECIAL PROPERTIES:
VERIFYING CUSTOM UI
Cocoa Views Available: 1
JUCE_AUCocoaViewClass_6d19f19c8fbfb5a1
PASS
HAS FACTORY PRESETS
VERIFYING CLASS INFO
PASS
TESTING HOST CALLBACKS
PASS
* * PASS
--------------------------------------------------
PUBLISHED PARAMETER INFO:
# # # 5 Global Scope Parameters:
* * PASS
--------------------------------------------------
FORMAT TESTS:
Reported Channel Capabilities (explicit):
[1, 1]
Input/Output Channel Handling:
1-1 1-2 1-4 1-5 1-6 1-7 1-8 2-2 2-4 2-5 2-6 2-7 2-8 4-4 4-5 5-5 6-6 7-7 8-8
X
ca_require: IsStreamFormatWritable(inScope, inElement) NotWritable /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:827
* * PASS
--------------------------------------------------
RENDER TESTS:
Input Format: AudioStreamBasicDescription: 1 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved
Output Format: AudioStreamBasicDescription: 1 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved
Render Test at 512 frames
Slicing Render Test at 64 frames
PASS
Render Test at 64 frames, sample rate: 22050 Hz
Render Test at 137 frames, sample rate: 96000 Hz
Render Test at 4096 frames, sample rate: 48000 Hz
Render Test at 4096 frames, sample rate: 192000 Hz
Render Test at 4096 frames, sample rate: 11025 Hz
Render Test at 512 frames, sample rate: 44100 Hz
PASS
1 Channel Test:
Render Test at 512 frames
PASS
Checking connection semantics:
Connection format:
AudioStreamBasicDescription: 1 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved
PASS
Bad Max Frames - Render should fail
ca_require: inFramesToProcess <= mMaxFramesPerSlice TooManyFrames /Applications/Xcode.app/Contents/Developer/Extras/CoreAudio/AudioUnits/AUPublic/AUBase/AUBase.cpp:1360
from AU (0x8147e052): 'aumf' 'OwlS' 'RBLT', render err: -10874
PASS
Checking parameter setting
Using AudioUnitSetParameter
Using AudioUnitScheduleParameter
PASS
Test MIDI
ERROR: -4 IN CALL MusicDeviceSendMIDI
* * FAIL
--------------------------------------------------
AU VALIDATION FAILED: CORRECT THE ERRORS ABOVE.
--------------------------------------------------
validation result: failed validation
updating properties of AU OwlSim by RebelTech...done.