Hello. MusE audio fans looking for some basic latency relief will want to test the new improved Wave Editor in the SVN trunk.
In particular, there is now a menu item "Adjust Wave Offset" (in frames). This adjusts a Wave Event's starting frame into the wave file. It makes the wave move to the LEFT.Wave Offset is a parameter unique to Wave Events, above and beyond Wave Event position and Wave Part position. It does not touch the Wave Event position nor the Wave Part position. This is good news for audio fans because currently it is the only way to adjust something by FRAMES rather than TICKS. *See related news below. This makes it good for basic recorded wave latency compensation especially with large Jack periods. Here's how it works: Say you want (or need) to run Jack with large period sizes like 2048 samples. When you record a Wave Part whose audio comes from an Audio Input Track routed from a PHYSICAL Jack port, there will be latency in the resulting recorded wave equal to the Jack period, meaning the wave is out of alignment with the true recorded time. 2048 samples is a long time, pretty severe. Until now there was no way to compensate for it. So now using the new improved Wave Editor simply adjust the recorded Wave Event's Wave Offset to the Jack period (example 2048) and the wave will then be aligned properly. If the Audio Input Track's Jack ports happen to form a send-and-return path coming from an Audio Output Track, you likely should DOUBLE the amount. Note this is not a perfect system: For example If the source of recorded audio comes from two different physical Jack ports at the same time, each with DIFFERING inherent latency, then Wave Offset will be useless. So it is recommended to stick with ONE Jack port per Audio Input Track, IF that Audio Input is to be RECORDED to a Wave Track. An ultimate latency compensation system is much lower-level (at the mixing level) and more or less fully automatic. Some effort is being put into this here, but it's pretty hairy - some gotcha's to sort out. Related news: A new MusE branch was started to deal with providing proper "Sample" and "Minute:Second:Frame:Subframe" and "Tick" Time Scales (in addition the current Bar:Beat:Tick) and movement/cutting/pasting etc, anything dealing with TIME, for users who need to work with linear time, rather than musical time. It's gonna be quite a while before the branch could even be compilable though. Cheers. Happy recording. Hope this little feature helps "offset" any troubles. Tim. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Lmuse-developer mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/lmuse-developer
