I'm running a Mac Book Pro with 2.4 GHz Intel Duo processors, 2GB RAM, OSX 10.4.11, and MAX/Msp 4.6.3. Last week I applied the EFI Firmware Upgrade 1.5. I think that this was a huge mistake. Before I applied this upgrade, I had no audio problems, and now I see chop and stutter in patches that generated nice, smooth effects prior to the upgrade (no changes to the patches). Is anyone else out there with a MBP seeing any audio problems following this upgrade?
Basic Mac apps like iTunes run fine. So do simple Max patches.
But, I have a feedback/delay effects patch which uses poly~ that used to run smoothly on my MBP that now stutters. As a sanity check, I installed this patch on another machine (a Dual 2.7 GHz Power PC G5 Desktop machine running OSX 10.4.11 and Max/MSP 4.6.2). The patch runs smoothly on this machine, as it did on my MBP before the firmware upgrade.
I have tried:
1) Trashing my Max/Msp preferences
2) Adjusting the I/O and Signal Vector sizes
3) Using internal audio as well as external MOTO828 audio interface (so audio interface drivers, cables, speakers, etc. aren't the problem)
4) Varying feedback/delay coefficients (it doesn't matter how much or little feedback or delay is used).
5) Changing the number of poly~ instances from 20 to 8 (reducing the number of poly instances seemed to help, but it did not eliminate the problem)
Another observation is that after the firmware upgrade, the DSP Status Window shows the CPU utilization swinging wildly from 10-100%. Prior to the upgrade, the CPU utilization was a pretty steady 5-10%.
Has anyone else experience any problems following recent upgrades to OSX on the Mac Book Pro, especially with the latest firmware upgrade? Does anyone have any other ideas to try?
This upgrade seems to have rendered my machine unusable for Max/MSP development. I've opened a problem report with Apple about it...