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Jul 31, 2012 3:46 AM in response to NENA 77by gen_,This is caused by one of two things. Assuming you are using EXS24 to play instruments then you may simply have run out of polyphony. EXS and all other samplers set a maximum amount of samples to be played and cut off the first sample pressed when you press any notes that exeed that. On most presets your Polyphoney is set to 32 voices (samples) but most piano samples will have more than one voice per note played. Try increasing your poyphony in the EXS instrument view.
The other issue could be that you simply ran out of streaming bandwidth on your hard drive when you were playing. If you've already increased your polyphony, or are using big patch (bigger than the ones Logic came with) you could have reached the point where you're playing so many notes that your harddrive can't keep up. In this case you would hear the start of the note and then it would apbruptly cease. This is becasue all notes on the instrument have thier first half second loaded into memory so the hard drive has enough time to find the sample file and continue playing it, but if the hard drive is busy finding and playing a lot of other soudns then it will fail to find the new one it time and hte sound will be canceled. In this case you will probably need to buy a faster external harddrive and run the samples from that. I cannot give you a guide as to what your options are but any desktop sized external 3.5" hard drive (which is larger in physical size and needs to be plugged into a wall) should be fine as they have superior speeds to your built in 5400 and 7200rpm Mac drives.
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Jul 31, 2012 5:07 AM in response to gen_by NENA 77,Sorry, wasn't as clear as I should of been. When this happens, it happens to all plugins. So I stop playing, and then play one note and just hold it out. It will sound for a couple of seconds and then, like pulling the plug, it instantly stops.Repeat, same thing. Restart, problem gone,,,,,,,, for now.
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Jul 31, 2012 5:52 AM in response to NENA 77by gen_,Sounds odd, well if the problem comes back, let us know. There are a few diagnostics that can be run to see if everything is A-OK on your system.
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Jul 31, 2012 11:36 PM in response to NENA 77by gen_,Well the first thing you can try is a MIDI test, this will tell you if any of you devices are conflicting or sending malformed signals. The instructions are here http://support.apple.com/kb/HT3157
The second thing you can do is look in logic for a Stop CC being triggered, this is a MIDI command that instantly stops all audio signal. Logic usually sends it to all instruments when you stop playing a song (I.E hit the spacebar). If you're playing from slightly older tech (especially synths with keyboards attached), or have MIDI playthrough on your new keyboard, they cpuld be sending thier own at random times and this may be the issue. Look for CC control signals 120-127 popping up in the bar, and go into Preferences > MIDI > general and make sure External Stop Message Ends recording is ticked. Then reset drivers and check in the box next to CPU use on the transport to see if any reset messages arrive. These would have different names on the top portion of the box, but always have x, (a number between 121 and 126), x. With X being an unimportant number.
Finally, it could be CoreAudio at fault. As much as I love CoreAudio when it does work, when it doesn't its a *****. If it comes to that we'll delete caches, preferences and try as much as we can, but you may have to reinstall to fix it.
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Jul 31, 2012 11:39 PM in response to gen_by gen_,★HelpfulAnd to add, you're looking for the MIDI test to flash at the point when your audio drops, or shortly before. Try it on its own, and see if it lights up randomly at first.
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Feb 10, 2013 2:10 AM in response to NENA 77by Phij,Hi- this a known bug and there is a thread on it here....
https://discussions.apple.com/thread/2296860?tstart=90
Soeoe claims that 2.2 helps the problem but I can't confirm this.
