I have to be very careful with polyphony or sample rates at the lower frequencies. My performance index on a Core i5 8265U can vary from 26 - 130 based on what baseline frequency I choose (800mhz, 1600mhz, 2000mhz or 3800mhz) based on power management settings. Adjust your baseline frequency to your performance needs. Don't expect any better low latency throughput performance than your baseline frequency (don't expect frequency scaling to provide enhanced performance) and 2. The closest I have seen to anything like that is
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I don't think Mac OS X has DSP-sensitive proactive scaling algorithms. Because it is relatively slow to scale and ignores DSP load, the CPU frequency often doesn't scale until after an overload occurs, or even doesn't scale at all.
One of the problems I think is that while DSP capacity is heavily dependent on CPU frequency, CPU frequency scaling isn't very sensitive to DSP load. CPU scaling is currently too reactive and laggy to CPU load to be of use in preventing CPU overloads. But even with HWP (hardware-controlled CPU frequency scaling, which Intel calls "speed shift"), P-state transitions occur in 1-30ms, which is still much too laggy to prevent CPU overloads. I am not sure how Mac OS X handles frequency scaling. This to me sounds like a CPU performance tuning issue more than anything (but yeah there could be background processes also stealing CPU cycles). Pianoteq is highly dependent on CPU performance. You can also try reducing the number of output channels in the Microphones setting window. If this is the case you should reduce polyphony and/or the internal sample rate in the Options menu. If these adjustments do not help, your CPU may not be powerful enough (please refer to our hardware requirement specification). Although the latency will increase, the CPU load will decrease. For playback and editing, increase ASIO buffer size to maximum. If using another CPU intensive VST instrument or effects plugin (such as convolution reverb), we recommend that you use it for playback and editing only if you encounter any issues.
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Make sure that your operating system is updated and optimized, free from spyware, trojans and CPU intensive anti-virus or utility programs running in the background. on its Support Page and under the Troubleshooting heading of it ( ): You may want to consider the following excerpt taken directly from Modartt’s Complete F.A.Q.