From: SourceForge.net <no...@so...> - 2006-06-02 20:35:07
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Bugs item #1475813, was opened at 2006-04-24 23:54 Message generated for change (Comment added) made by spamatica You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=604222&aid=1475813&group_id=93414 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Audio Group: None Status: Open Resolution: None Priority: 5 Submitted By: emmef (emmef) Assigned to: Nobody/Anonymous (nobody) Summary: No input latency compensation Initial Comment: This is about version 0.8.1 (gentoo) but might as well exists in other versions. When recording audio from the audio inputs, the recorded data is not compensated for latency (the number of frames in the -p option of the jack server). This means that when you make a recording, based on what you hear via the playback, the recorded sound will be delayed. If you connect the audio line-out and line-in (mind the mixer settings!) and playback a track, recorded sound should be equals to the played track: - Ardour over-compensates (recorded sound is EARLIER than original). Also posted a bug there; - MusE does not compensate (recorded sound is LATER). For various reasons it is not always necessary or even desireable to have a tweaked audio setup with latencies <5ms. (note 1) It *is* possible to ask jackd what input latency it provided and this could be added as an extra to the InputDevice class, which you undoubtedly have in some form, so that the recorded wave part is compensated. As MusE supports plugin-latency compensation, you could also create a hidden insert in the input track, that claims the jack latency, but has no actual latency (so that the plugin latency mechanism fixes things). NOTE 1: Kernel patches don't always work and some distributions even break on them if they did succeed after all. If you don't use many plugins and do many accoustic and/or live instruments, hardware (real zero latency) monitoring together with the sound played back is enough. Recording tools should correct the latency ---------------------------------------------------------------------- >Comment By: Robert Jonsson (spamatica) Date: 2006-06-02 22:35 Message: Logged In: YES user_id=81832 Thanks for the report. Hopefully we can look at this for 1.0. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=604222&aid=1475813&group_id=93414 |