Differences

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--- faq:start [2016/03/20 13:16] – [Q: Is it possible to run VST plugins on Linux?] replaced outdated windows vst hosts links spotlightkid
+++ faq:start [2016/03/20 16:31] – [Q: How to optimize my system for audio / midi ?] Rewrite for clarity spotlightkid
@@ Line 9: / Line 9: @@
 ==== Q: How to optimize my system for audio / midi ? ====
-**A:** <del>Using a "real-time kernel" and setting priorities appropriate is an important step here</del>. This has often been told, but according to the jackd FAQ it is simply not true! See [[http://jackaudio.org/realtime_vs_realtime_kernel]]
+**A:** For some uses, it can be helpful to run a realtime (RT) kernel, but generally this isn't necessary anymore. See the following JACK FAQ entry: [[http://jackaudio.org/faq/realtime_vs_realtime_kernel.html | Do I need a realtime kernel to use realtime scheduling?]]
-[[wiki:real_time_info|Articles and more information about real time operation]].
+In Linux kernels 3.0 and later, many of the additionally required realtime patches have been incorporated as standard. For those who are recording Audio, a standard non-realtime kernel may be sufficient for your needs, and running Jack with a non realtime kernel will work fine.
-In linux kernels 3.0 and later, many of the additionally required realtime patches have been incorporated as standard. For those who are recording Audio, a standard non-realtime kernel may be sufficient for your needs, and running Jack with a non realtime kernel will work fine.
+You need to configure your system, however, to [[http://jackaudio.org/faq/linux_rt_config.html | allow JACK to use realtime scheduling]].
+This wiki has some more [[wiki:real_time_info | articles and general information]] about real time operation.
-For those who write a lot of Midi, the standard kernel timing is set at 250Hz, and realtime kernels are generally set at 1000Hz. You may still have to use a realtime kernel to obtain accurate midi playback using the higher timing setting.
+Those who produce a lot of MIDI I/O, may want to use a Linux kernel with non-standard timer interrupt frequency (aka "tick rate"). The standard frequency is set at 250 Hz, and realtime kernels are generally set at 1000 Hz. You may still have to use a realtime kernel to obtain accurate MIDI playback using the higher timing setting.
 ==== Q: Some of my applications sound a (half)tone too high/low, have a wrong pitch ? ====
 **A:** It's likely, that the sample-rate of the programs you're using doesn't match.