Stefan Lucke schrieb: > On Samstag 04 November 2006 13:56, Martin Wache wrote: >> Stefan Lucke schrieb: >>> On Donnerstag 02 November 2006 16:40, Juha Pahkala wrote: >>>> Stefan Lucke wrote: >>>>> Quoting Juha Pahkala <[EMAIL PROTECTED]>: >>>>> >>>>> >>>>>> Just updated my softdevice from 0.2.2 to 0.3.0. Picture-wise, it seems >>>>>> to be an improvement, I'm not sure whether I'm imagining things but the >>>>>> picture does seem crispier on the primary head of my g400... although I >>>>>> also updated dfb so not sure who's to blame ;) >>>>>> >>>>> Can you try: >>>>> a. unmute main pcm with alsamixer, or >>>>> b. comment out line 15 of audio_alsa.c: #define NO_MIXER >>>>> >>>> Hi Stefan, >>>> >>>> Option A didn't make a difference but commenting out the NO_MIXER define >>>> fixed the problem! So thank you for your help (as well as softdevice in >>>> general ;) >>> Can you try the following patch which makes use of alsa mixer >>> selectable via OSD ? >>> >> I fear some strange effects if one switches the use of alsa mixer via >> the osd. Consider the following, the volume of vdr is at some low >> position, the alsa mixer is in high volume position. One switches from >> no mixer to mixer. The audio wont be scaled any more so the volume goes >> dramatically up, since the alsa mixer is still in a high volume >> position. > > Yes I'm aware of this, but this problem already exists. Think of > an external amplifier connected via S/P-DIF. Volume is set to low position > and controlled by either alsa mixer or software scaler. Then consider > a switch to an AC3 station, for which volume control is done by > external AC3 decoder/amplifier only. User and his/her neighbours will > notice a volume difference too. > Well, the softdevice (just like the FF cards) can not change the volume of an AC3 stream, we cannot change that. But that doesn't mean that we have to introduce more traps which could hurt the ears of users even if they don't use AC3 equipment ;-). And I guess anyone who has AC3 equipment connect anyway only uses the external amplifier to change the volume, this is the only sensible option.
>> Now one changes the volume of the vdr by one step, the volume >> will jump to a low volume again, because the alsa mixer will go down to >> a low volume. If one now switches back to no alsa mixer option, the >> volume will instantly go down even more, since now the audio is scaled >> (or something else, scale_Factor is unset)... >> >> Some of those problems can surely be fixed, but that will make it more >> complicated. If one has to be able to select to use the alsa mixer I >> would prefer a command line option. > > A command line option has the disadvantage, that the calling script has > to be edited. In a vdr only setup, a normal user has no chance to do this. > Oh, come on. Connecting AC3 equipment is not something a normal user does every day, and during installation of the softdevice the command line has to be setup anyway. >> But maybe you can explain me what actually the problem is? Of course if >> the AC3 data would be scaled, that would make the useless, but as far as >> I see, that is not the case. So the is the problem the alsa mixer setting? > > Yes the problem is the mixer settings. on my other test box I noticed the > situation > too, but I could fix it by alsamixer and unmuting main + pcm mixer and give > them > a reasonable volume level than default. > > So there a many ways to control volume: > a. external amplifier (S/P-DIF) > b. external amplifier (via line out) > c. PC-Speaker > > Things to be controlled by vdr / PC > a. alsa master volume + mute > b. alsa PCM mixer volume + mute > c. alsa line out + S/P-DIF out (mute ?) > d. alsa output switches (s short summary from my setup) > - IEC958 5V, Copyright, In Monitor, Loop, .. > - Line-In Mode: Line-In, Rear Output, Bass output > - Mic-In Mode: Mic-in, Center/LFE Output, > > Controlling alsa in total, is enough for separate plugin I guess. > There is the AVolCtl-plugin ;-) As you said, we can not control everything... If I understand that correctly AC3 passthrough works with NO_MIXER defined and with the correct alsa-mixer settings at the start of the softdevice? Maybe it is time for a FAQ, and we put all this in the FAQ. Bye, Martin _______________________________________________ Softdevice-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/softdevice-devel
