When I playback the recorded content I hear disturbances similar to playing live audio when you have an unclean volume knob. There is no clipping and it does not matter which playback program I use. Any ideas what could be causing this?
Thank you.
Thanks for the information.
I will dig further into this problem. However just to add to my initial post. I am using Presonus FP10 and jack uses libffado. The crackling sound also appears when I am recording a single track and it also appeared yesterday when I had both Rosegarden recording midi and Ardour recording 2 audio tracks simultaneously. Needless to mention that I have just been experimenting with Linux recording since last 5 days so I am fairly inexperienced. Furthermore, it is not a hardware problem as everything records well under Windows.
Thank you.
What Linux distro are you using?
fedora 12.
you need to supply a LOT more information, as detailed here: http://ardour.org/how_to_report_a_bug … JACK settings in particular are critical information.
Thank you for the response. I am not sure if its a bug in Ardour and so I will just respond via email:
Details:
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CPU = AMD Athlon II X4 620
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RAM = 3091252 Kb.
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DISK SPEED = 7400 rpm
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FREE SPACE = 7.5Gb
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system = Fedora 12
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Kernel = 2.6.32.21-168
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Ardour = 2.8.11 (build from version 7387)
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JACK = 0.118.0
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/etc/settings/limits.conf has
@audio - rtprio 99
@audio - nice -10
@audio - memlock 2318436
audio hard memlock 512 -
JACK SETTINGS:
Realtime - Priority = 89 - No Memlock - Frames/Period = 16 - Sample Rate = 44100 - Periods/Buffer = 256
Enable ALSA Sequencer Support
Enable Dbus Interface.
I can provide more if required. Note Ardour would occasionally freeze w/o realtime mode. Also yesterday I heard some clicking in Rosegarden recording as well - however it was considerable less frequent than Ardour.