William Hubbs, le Sun 24 Oct 2010 10:41:07 -0500, a ?crit : > On Sun, Oct 24, 2010 at 03:56:00PM +0200, Samuel Thibault wrote: > > Getting back to the issue of volume levels in a future Debian installer > > with software speech synthesis, I've just realized there's direct alsa > > support in espeakup. Would it perhaps be better to use that instead of > > portaudio? > > Unfortunately the direct alsa support is not quite where it needs to be imho. Ok. > > In any case, could somebody work on adding an option to set all the > > muted audio levels to a middle value? The installer could then pass it > > to somehow make sure at least some audio goes through. > > The issue here is that the channels are muted by default, and we would > have to find all muted channels and unmute them as well. From what I > remember that has to be done with alsamixer or something similar from > the command line; I do not know of an API function to unmute sound > cards. Well, there must be one since alsamixer is able to do it. > The way we do that for now on gentoo and arch is with scripts > that run as part of the boot sequence. But that'd mean yet more tools on the d-i disk, taking room, while I believe it would be helpful to have it in espeakup, also for the reason below: > > Also, the CMD_SET_VOLUME command only adjust the espeak volume, and not > > the actual PCM volume for instance. I'd say with the option mentioned > > above it should also set all output volumes it can find. > > CND_SET_VOLUME is used when the volume is changed either in the speakup > sys file setting or from the keyboard, so I'm not sure you want that to > mess with any volumes other than speakup's volume (espeak's volume > setting is what actually gets adjusted). That's why I'm saying it should be done only when the debian installer gives the option to do so. > I don't know, again, if there is an ALSA API call that will "find all > volumes on a card and set them to a certain level" or not. Probably not that exactly, but there must be an ALSA API that will find all volumes on a card, an API to get their level and muteness, and an API to set their level. Looking at the alsamixer source code would probably be useful. Samuel
