Hi, Am Samstag, 29. Mai 2010, um 12:02:18 schrieb Stefan Fendt: > Well, I'm not sure what you try to distinguish with this. But performing > sample-exact calculations of the audio-automation (and the envelopes) is > possible in realtime (at least on the sample-rates used for > realtime-preview and -playback), too, nowadays... So I maybe don't get > the point... Doing that for all controls still is not feasible. Changing some parameters sometimes causes a complete recalculation of a model and thus is not realtime safe. I however agree with that it should be possible with simple controls like volume, panning etc. > Without having done further test-renderings of the output of lmms and > without having looked deeply at the source-code of these... Yes, any > block-wise calculations of volumes can be the source of a multitude of > different click-sounds. In this case it is. Furthermore this depends on the resolution of the according control. At least in older versions we used integers [0:100] for volume which is far too coarse.
> 1. Is lmms doing these block-wise calculations only(!) for > audio-automation or is it utilizing this sort of calculation even > for audio-envelopes? No, all envelopes and LFOs are sample-exact. > I ask because I have these click-sounds not > only when using audio-automation but also when using just > envelopes... You rather mean, when disabling them? Because then the signal is taken as generated by the generator without any further processing. A simple phase shift could cause discontinuous jumps . > 2. May it be the case that for some reason uninitialized > variable-values leak into this process? I noticed some rather > strange clicks in the audio-output of at least the current master Me too. Not sure whether it has to do with the new FX mixer. As far as I know the 0.4.x series is not affected by this. Maybe someone should run Valgrind on the master branch version. > 3. Is there some sort of ramping used? Linear approximation or > anything better to soften the edges of the blocks? Currently not - and sometimes unsteady jumps might be desired. I'm not sure what way to go here.. > Just to clarify this: I have these strange click-sounds not only when > using envelopes and or audio-automation. It's just that they appear to > be a lot stronger and a lot more frequent when using envelopes and or > audio-automation. I'm really interested in the proposed test files :-) Toby
signature.asc
Description: This is a digitally signed message part.
------------------------------------------------------------------------------
_______________________________________________ LMMS-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/lmms-devel
