On Tue, Feb 16, 2010 at 10:07:03PM +0100, Lennart Poettering wrote: > On Tue, 16.02.10 17:29, Jaroslav Kysela (perex@xxxxxxxx) wrote: > > Basically, if I remember correctly the discussion, 0dB on all elements > > should main unchanged volume, <0dB attenuation and >0dB gain. > But you need some kind of "anchor" for that. What you write above > applies only for elements that have some kind of analog input and > output. But the most interesting components are probably the DAC and > ADC (i.e. the "innermost" elements), and it's not clear what level they > output, so the "anchor" for the relative dB values is missing... Typically the DACs and ADCs will have a full scale signal at line reference level - it should generally be a good approximation with nothing else to go on. > If you plot this it looks as if the card actually only implements 10 > or so discrete steps, and at around 10000 just becomes a constant > function. That's quite common. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
