Logic Audio Region (24 bit, stereo) BugTest
"""""""""""""""""""""""""""""""""""""""""""""""""""
1. To extract, UnZip to chosen directory.

2. Launch Logic.

3. Open 'AudioRegionBugTest.LSO'

4. If Logic can't find 'Hi-Hat_stereo_24bit.wav', point the
file requester to wherever it was extracted.

5. Logic might ask to convert this song's environment
to match your audio in/outs - let it do so.

6. Hit 'Play' - the affected sequence (Two) is already
selected and cued up to cycle. A metronomic quarter-note
Hi-Hat pattern 'should' play back but on every machine
I've tested it on, it certainly doesn't - every other cycle or
so, the timing periodically glitches.
   Compare with the other sequences which all play okay.

7. Tell me I'm not mad...
_____________________________________________

How to reproduce:
""""""""""""""""""""
Drag a simple, rhythmic  24 bit, stereo file into the Arrange
page copy & paste it. Chop that into four adjacent bars.
(Here, individually coloured for clarity, as 'Sequence One'.)

Copy and paste these, select the first three bars and use
the 'Finger' tool to extend their boundaries so that each now
consist of five beats. Use 'Tie Objects By Position Change'
in the 'Functions' menu, so the regions don't overlap -
'Sequence Two' in my example.

The unaltered original and chopped-up 4/4 sequence play
back fine. Sequence Two, which should sound identical, glitches
and goes out of sync sporadically after a few passes, both
straight and in cycle mode, 

The bug seemingly only affects 24 bit stereo files - not 16 bit
stereo/mono or 24 bit mono.
______________________________________________
______________________________________________

Tested  on:
"""""""""""""
Logic Platinum 5.5.1, Windows XP Pro/SP1, RME HDSP 9632,
(ASIO, 1024 buffer) P4 2.4c GHz, i875 chipset, 1 Gb ECC DDR400
memory. (Tested in dual boot environment: one with a Powercore
and a multitude of VST/DX instruments/FX and various software,
and a 'clean' partition where Logic is the only installed application).

Logic Platinum 5.5.1, Windows XP Pro/SP2, Creative Audigy2
(Creative ASIO, 7ms) Dual PIII 1 GHz, Intel BX chipset,
1 Gb PC133 memory.

Logic Platinum 5.5.1, Windows XP Pro/SP1, Creative Audigy
(Creative ASIO, 7ms), PIII 1.4 GHz, i815EP chipset, 512Mb
PC133 memory.

All at 24bit/44,100 kHz sample rate
______________________________________________

adrian@zarathustra.u-net.com

