[linux-audio-dev] Alsa sequencer - starting a track in the middle and looping

Hi all, <the problem> Trying to implement starting the playing of a track at a user defined cursor position (not at the start). Also trying to implement looping. Anybody got any info or code snippets that could help (c or c++ - not too complicated though and without too much tangential code). I am sorry but I find the alsa documentation not very helpful. The documentation of the concept of the sequencer is either out of date or in another case just enough to get people going. The api documentation is just woe-ful. I have had to constantly look at other peoples' code (and try to understand what they were up to). Have I missed finding some top notch documentation? </the problem> <program description> Java based gui programme using the java native interface (JNI) and a c library to access alsa sequencer. Java allows for a high level of platform independence. The c library, accessed via the JNI, can be re-written to interface with various libraries like portmidi to allow for full platform independence (with some caveats no doubt). The concept is the usual song has tracks, which have parts which have events. Each track also has a global part for automation data (volume, pan etc). Each track has 64 patterns (parts). The sequencer allows for a looping audition mode (using the selected pattern from each track ). Song mode allows these patterns to be inserted on a per track basis as required to create an arrangement. At the moment the sequencer ends up being very jack and linux oriented in that many jack audio applications are started up and managed by the application itself. I am not sure how this would translate onto windows. Also because many independent jack applications are being run things like jackrack also need to be run (for effects) and jack connections managed. If there is a windows equivalent maybe someone could let me know (I haven't touched windows in years except at uni and in the workplace). </program description> <personal backgound info> I finished uni at the end of last year (after many years of working full time and studying at half load, then finally studying full time) and have had some time on my hands. I have now fully revised a lot of stuff for getting a job (2 interviews in 5 months - so it's pretty slow going), built a business web app using java JSPs, java tag libraries, struts and JDO JPox for my wife and now I am working on some old code to build a midi sequencer based around the way I like to make music (patterns and automation). </personal backgound info> Sorry about the above waffle but it explains why have subscribed to this list for quite a few years and never contributed anything. Thanks Kev Send instant messages to your online friends http://uk.messenger.yahoo.com