• AJA Video Systems

  Audio crackle above ~ -6dB AJA Kona LHi

  Posted by Conor Flanagan on February 24, 2015 at 10:51 am

  Hi guys I’m a long time lurker of the cow and I’m normally of that mind that when I google a problem if I am redirected here then I have asked correctly.

  Alas I am not finding anything conclusive answers to my problem. So I have to bother you all a little more directly.

  In our edit suite we have a AJA Kona LHi card outputting to a monitor and two Genelec monitors.
  When audio is played from premiere and the meter reports peaks between -6 and 0db there is a lot of crackling.
  I have played the timeline through another set of, different brand, monitors with the same results.
  However when I play the same projects on another machine with an AJA Express IO hooked up to two monitors there are no issues.
  When I normalise audio to -6dB the problem is gone. This is my current workaround for dailies and when the bosses want to show off our showreel.

  I read somewhere on here about the genlock being a problem but the cards are only used for output and there for genlock is freerun.
  I also read somewhere else about introducing a mixer between the kona and monitors. But it is my belief that it is a signal issue.

  I am a little light on my audio knowledge and I’m more used to working with sound guys directly and on smaller projects.
  Please tell me I have overlooked something Cow – it’d be great to have this sorted before animatics kick off next week. 🙂

  Many thanks.

  Specs – don’t think they’ll help much, but just in case.
  ——
  Win7
  2 – Xeon E5-2640 2.5GHz
  16GB RAM
  Quadro 4000
  OS – SSD
  Fiber connection to Terrablock 24D

  Conor Flanagan replied 11 years, 4 months ago 1 Member · 0 Replies
• 0 Replies

Reply to this Discussion! Login or Sign Up