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The hardware buffer size is the number of audio samples that the CPU passes to and from the I/O hardware in one go.
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If a –6097 error occurs while Pro Tools is idle, you should reduce the number of plug–ins active in the current session. However, setting the CPU Usage Limit above 95 percent may cause –6086, –6093, or –6097 errors. For example, with sessions containing a large number of RTAS plug–ins on a multi–core machine, you should allocate two or more processors to RTAS processing and set a high CPU Usage Limit, but leave one processor unallocated to RTAS duties.
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If you have a multi–processor computer it is possible to set the CPU Usage Limit right up to 99 percent, as long as you leave one processor free to take on the housekeeping duties. Used in conjunction with the CPU Usage Limit setting, the RTAS Processors setting lets you control the way RTAS processing and other Pro Tools tasks are handled by the system. This setting determines the number of processing cores in your computer that can be allocated for RTAS plug–in processing. Try lowering the CPU Usage Limit by 5 to 10 percent if this happens. When the CPU Usage Limit is set to 85 percent or above and the RTAS Error Suppression box is ticked, you can experience a slowdown in screen redraw and background CPU tasks. You will soon find out if it is too low, as you’ll get –9128 errors when there aren’t enough processing resources for the RTAS plug–ins you have in your Session. In general, the fewer RTAS plug–ins you are using, the lower you can set the CPU Usage Limit. If you do, the remaining 15 percent of CPU power will have to do all the other chores, like displaying meters and graphics, controlling automation and dealing with MIDI ideally, you should allow around 35 percent to handle those processes. The default 85 percent is the maximum you can assign on computers with a single processor, but it isn’t always best to set the usage limit to the maximum. For example, the default setting permits up to 85 percent of total CPU resources to be devoted to running RTAS plug–ins, with only 15 percent left over for all other duties. The CPU Usage Limit option sets the maximum proportion of your computer’s processing power that will be allocated to Pro Tools’ audio engine.
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In this window (the screens below are from my HD2 TDM system running on a dual 1.42GHz G4 Mac and my M Box 2 Pro system running on a 1.67GHz G4 Powerbook) you can adjust the following: The Playback Engine window provides different options depending on whether you are running a TDM or host–based Pro Tools system.The first place to visit is the Playback Engine window (under the Setup menu) where you can adjust various settings to help you get extra performance in some areas at the expense of a hit in other areas. Whether that means fewer plug–ins for lower latency, or rendering effects to reduce the number of active RTAS plug–ins, to quote just two examples, you will end up having to make a choice between several evils. Squeezing the last ounce of performance out of your system is nearly always going to be a trade–off of some description. Either way, your host computer has a finite amount of processing power and when it’s gone, it’s gone! Hard–drive bandwidth can also be an issue, so although you may be able to play back a Session with 32 tracks just fine, the system may start to cough if you do some heavy editing or add lots of plug–ins and automation. It matters even more on host–based systems such as LE and M–Powered, because TDM systems have DSP cards to take care of most audio processing duties, leaving the host processor to manage data management, routing, driving the screen and so on.
Ultimately, the raw processing power of your computer is the key to how well your Pro Tools system will perform, whether you use a Mac or PC, TDM, LE or M–Powered system. In this month’s workshop we’ll be looking at ways in which Pro Tool users can do just that.
#Protools 12 takes long starting up osx software
The increasing sophistication and popularity of software instruments, samplers and the like means that conserving CPU power is still crucial for many of us.
#Protools 12 takes long starting up osx how to
We explain how to wring that last ounce of power from your Pro Tools rig.Ĭomputer power grows every year, but so to do the demands we place on our systems. We’ve all been in that situation - desperate to add one more plug–in, but with a computer on the verge of collapse.
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