James Courtier-Dutton wrote: > Some time ago, there was no way to tell, from user space, if 100% > or 50% was 0db, -50dB or +50dB. As a result, the safest value to > use was the minimum value being either 0% or mute. That has changed > with alsa 1.0.16, as dB gain information is now available. I'm not sure where user space fits in. I'm talking about the sound/pci/rme9652/hdspm.c driver which mutes every channel at initialization by calling all_in_all_mixer(hdspm, 0); cf. http://lxr.linux.no/linux/sound/pci/rme9652/hdspm.c#L3396 AFAIU, the driver "knows" what level corresponds to 0 db. > But the value of 50% does not correspond to 0 dB for all sound > cards. I'm not discussing all sound cards, I'm discussing the sound cards driven by hdspm. Is it safe to assume that, for the cards driven by hdspm, level 32768 corresponds to 0 dB? Regards. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
