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From: Craig Beaumont <cbeaumont1@...>
Date: Sun, 1 Aug 2004 at 8:24:00 PM
Subject: Re: [LUG] Weird midi problem
Message #167639
This is a reply to #167606.
On 8/1/04 3:33 AM, "Guy St-Pierre" <gstp@...> wrote: > Hi, > I've been using logic live for about 8 years with great result and very few > bugs (something like 400 shows). Recently I started to have weird behavior: > Randomly the midi stop (I use only midi for live) and the computer crash > (that was with a G3 266, logic 4.6 on OS9 and a MTPII) So after trying all > new cables, other versions of logic (4.7, 4.8) I decided to try with a > unitor 8. Same problem appening randomly (something like it stop playing > after a one hour set or after 15min...) > So since the computer was old I bought a powerbook 867 and I start using OSX > with logic 6.4.2 and the unitor. Guess what after playing a full night with > no problems I just experience the same f#$% problem the second night, except > the computer don't crash. At some point the midi communication with all the > modules stop but the "bar meter" continue to roll and no sounds come from > any of my modules (korg, roland and K2000) If I stop and immediately start > again from there, the midi start working again! (Of course it's not an audio > problem with my mixer) Guy, I used to have exactly that problem all the time with my Powerbook g4....no crash just midi flow stop. Very embarassing on a gig. Happened with Unitor and also RME Multiface. Got rid of the Unitor and used the RME but still had the problem until RME discovered that there was a problem with some of Apple's Powerbook chipsets and wrote a BIOS flash workaround. Not sure how this will affect your use with the Unitor, but just sharing my experience as it may give you some insight. (upgrading to OS 10.3.3 may be your answer) This is from the RME site: Pre-note: According to our tests, Apple seem to have fixed the Aluminum issue described below in OS 10.3.3. We will provide information and driver fix for some more time, until it is sure all problems are completely resolved. The latest Apple 'Aluminum' G4 powerbooks will freeze when using MIDI and audio with RME's CardBus card. After weeks of heavy testing and examination using a PCI Logic analyzer on our CardBus card, we have come to the conclusion that the chipset of the current Apple PowerBooks includes a hardware bug. A PCI memory read command right after a busmaster memory write burst can end up in a deadlock. The computer seems to have crashed. The effect is easy to be reproduced by using software like Logic with both audio (busmaster) and MIDI (memory read). This problem can not be solved by a driver update. Thanks to RME's flash technology we are able to provide a slightly changed hardware version, which no longer triggers the problematic events. This new special Aluminum PowerBook version (hardware revision 12) uses I/O instead of memory commands to access the cards internal registers. Of course, such a change also requires a changed driver, which uses I/O read/write commands as well. Since driver version 1.4 a revision 12 CardBus card is detected and I/O automatically used. With all other hardware revisions, the usual memory commands are used. A CardBus card flashed to Aluminum PowerBook can not be used in a Windows or Linux machine anymore! Of course it can be flashed back to CardBus (only!) on the Mac, and is then compatible to Windows/Linux again. Once I flashed my card all was fine. If you are not already doing so, do crons and repair permissions religously. I ALWAYS do before a gig. Craig
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