On Monday 16 June 2003 18.03, Jaroslav Kysela wrote: [...] > > Maybe ALSA shouldn't mess with (N)RPNs at all, unless > > applications ask for it? > > I think that events are clear, so all applications using direct > sequencer API should handle them as well.
Yes, that's a point... However, if ALSA intercepts the underlying CCs for (N)RPNs, there is no way to use them as normal CCs by just looking at the (NON)REGPARAM events. For examyple, if something sends only CC 98 ("NRPN fine"), the app will get nothing. [...14 bit controls...] > Yes, Paul mentioned it and I see that the standard is not so good. > Does it affect also XRPN encoding (some LSB or MSB bytes might be > missing)? Well, the "Data Entry" CC pair *is* one of those ugly 14 bit things. > In that case the current implementation is broken. That goes for Audiality too. Dunno if I care, because I can't really do anything useful with 7 bit values anyway. I just store the other CC values and act on CC 38 ("Data Entry (fine)"). I think people would expect ALSA to do the Right Thing, though - whatever that is.... > I see some ways to do things correctly: > > 1) duplicate events (deliver both raw CONTROLLER + combo events) > 2) do not generate combo events at all, use only raw controller > events > 3) introduce timeouts (I hate this idea) Unless I'm mistaken about the (N)RPNs being normal 14 bit controllers, 1) would require timeouts as well - although it would allow applications to bypass them by grabbing the raw CCs instead. Either way, if that timeout isn't part of the spec, there is no way of implementing this correcly. You can't wait forever, and it's not safe to set it short and let occasional wrong values through. :-/ > I will stay with 2) for the moment (so nothing will change). Ok. BTW, what about apps sending (NON)REGPARAM events? Is it possible, and if so, are they converted into CCs even when passed directly to other ALSA sequencer apps? //David Olofson - Programmer, Composer, Open Source Advocate .- The Return of Audiality! --------------------------------. | Free/Open Source Audio Engine for use in Games or Studio. | | RT and off-line synth. Scripting. Sample accurate timing. | `-----------------------------------> http://audiality.org -' --- http://olofson.net --- http://www.reologica.se --- ------------------------------------------------------- This SF.Net email is sponsored by: INetU Attention Web Developers & Consultants: Become An INetU Hosting Partner. Refer Dedicated Servers. We Manage Them. You Get 10% Monthly Commission! INetU Dedicated Managed Hosting http://www.inetu.net/partner/index.php _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel