Hi,
I just posted the following bug report into Radar - Bug ID 5042146 and am reposting here for your info:
Pitchbend in MIDI File Causes Massive Audio Overload on Intel
The enclosed MIDI file causes a massive overload of the audio system on both Intel MacBook and Intel iMac at a certain point in the file. At this point a pitchbend is sent hard to maximum and a very loud screech can be heard through the audio system. This screech is *much* louder than expected and is very serious. Do not play this file loud!
The file can be played using the PlaySequence tool in the CoreAudio SDK. The command is: ./PlaySequence -p -t 2210 Buggy\ File.mid
In other words the loud screech can be heard just past 2210 beats into the file (about 2215). The overload lasts for many seconds. The file plays correctly on an external device. It also plays correctly under Rosetta.
End of Bug Report
I can send the file to anyone who requests it but repeat the warning. The screech appears to play at full volume regardless of the actual hardware volume. I first heard it through headphones and nearly had a heart attack. I was worried that my headphones were damaged. We accidently played it through my sons iMac after removing his attached stereo system and again the result was extremely loud.
Peter Zegelin www.fracturedSoftware.com
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