On Sat Apr 29, 2006 at 05:58:40 +0200, Robert Rozman wrote: > Hi, > > I'm designing integrated home automation/entertainment system based on Linux > and other open source apps. I have several possible sound sources (like > Festival as speech synthesis, music players, VOIP or > ordinary telephony applications, intercom) and several sound destinations > (rooms in my house - can be either remote desktop running some network audio > client or separate output on multichannel local audio card). Now I'd like to > implement > 'virtual' audio router/mixer in software that can be dynamically controlled > from other program language (Perl is preffered in my case). I'd need to > combine several audio sources to each sound destination (like big software > switching/mixing/routing black box), dynamically change volumes, add/remove > chains etc... you might want to check out NMM. it sounds more or like what you are talking about. http://www.networkmultimedia.org another option would be dynamically patching NetJack via OSC, combined with service discovery in either case, youre proably going to have to do various /dev/dsp hijack tricks etc until/unless all the apps you use support NMM or JACK natively.. > > Some possible scenarions: > - when internet voice call comes in, then I connect to certain channel on > audio card for > certain room (route two way audio stream that comes from Internet to certain > audio destination/source) > - when watching TV (sound going to some audio card output), speech synthesis > would like to announce something (I'd like to volume down TV audio and mix > speech, and then go with TV volume to normal level) > - from one room I'd like to talk to another... > > If I think ideally - best would be to have range of "virtual" sound > destinations, that could be dinamically routed,mixed to physical devices. As > far as my novice knowledge goes I was thinking of using Alsaplayers as > music/wav players (they have software volume control) , Festival as speech > synthesis, some softphone for IP telephony (that could output to ecasound or > Jack) and every other valuable suggestion for software package I get. I > don't know much of Jack, maybe its also part of solution.... > > Any other advice in apps to use, more info or any other opinion would be > more than grateful. Also if anyone made some effort or thinking in this > direction - it'll be of great help... > > Thanks in advance, > > regards, > > Rob.
