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faq:start [2016/03/20 12:16] – [Q: Is it possible to run VST plugins on Linux?] replaced outdated windows vst hosts links spotlightkidfaq:start [2017/08/26 15:21] (current) – [Q: How to remove noise from recordings? How to restore old recordings (from vinyl/tape)?] jeb_ponderworthy.com
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 ==== Q: How to optimize my system for audio / midi ? ==== ==== 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 ? ==== ==== 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. **A:** It's likely, that the sample-rate of the programs you're using doesn't match.
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-==== Q: How to remove noise ? How to restore old recordings (from vinyl/tape) ? ====+==== Q: How to remove noise from recordings? How to restore old recordings (from vinyl/tape)? ====
 Some noises can be removed by surpressing specific frequencies, by applying EQs or Filters. Some noises can be removed by surpressing specific frequencies, by applying EQs or Filters.
 Audiofile editors as audacity and rezound offer different solutions for noise removal. Audiofile editors as audacity and rezound offer different solutions for noise removal.
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   * [[http://www.muenchen-surf.de/mpaar/| "Declick 2000" plugin - not open source, but priceless]]   * [[http://www.muenchen-surf.de/mpaar/| "Declick 2000" plugin - not open source, but priceless]]
  
 +==== Q: How to eliminate noise from live production? ====
 +Live noise has many causes, including ground-loops, and other equipment near and far injecting static of many kinds.  This includes including weak but audio-active USB signals, PC fan noise, firewire, et cetera, into powerline, ground, and thence into the system.  There are many approaches to this, and often more than one approach is needed.
  
 +**Related articles** 
 +  * [[http://www.audioholics.com/home-theater-connection/ground-loops-eliminating-system-hum-and-buzz|Ground Loops - Eliminating System Hum and Buzz]] 
 +  * [[http://lsn.ponderworthy.com/doku.php/cleaning_the_tone|Cleaning the Tone]]
  
 ==== Q: What about timers and timing ? ==== ==== Q: What about timers and timing ? ====
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   * [[http://www.anticore.org/jucetice/?page_id=4 | Jost]]   * [[http://www.anticore.org/jucetice/?page_id=4 | Jost]]
   * [[https://lmms.io/ | LMMS]]   * [[https://lmms.io/ | LMMS]]
 +  * [[http://www.muse-sequencer.org/ | Muse Sequencer]]
   * [[http://qtractor.sourceforge.net/ | Qtractor]]   * [[http://qtractor.sourceforge.net/ | Qtractor]]
 +  * [[http://users.notam02.no/~kjetism/radium/ | Radium]]
  
 Proprietary: Proprietary:
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   * [[http://kxstudio.linuxaudio.org/Applications:Carla | Carla]]   * [[http://kxstudio.linuxaudio.org/Applications:Carla | Carla]]
 +  * [[http://www.breakfastquay.com/dssi-vst/| dssi-vst]]
   * [[http://www.joebutton.co.uk/fst/| fst-vst]]   * [[http://www.joebutton.co.uk/fst/| fst-vst]]
-  * [[http://www.breakfastquay.com/dssi-vst/| dssi-vst]] 
- 
  
 **Windows VST hosts:** **Windows VST hosts:**
faq/start.1458476212.txt.gz · Last modified: by spotlightkid