Hi, thanks for explaining Lennart. :) Regards, Sladi On Wed, 5 Aug 2009 20:18:32 +0200, Lennart Poettering <lennart at poettering.net> wrote: > On Wed, 05.08.09 20:11, sladivadi (sladivadi at verat.net) wrote: > >> Hi, >> >> I wonder what sample format I should use in order to minimize resampling >> across various module-combine and module-remap sinks. >> I specified rate=s32le for all virtual sinks I use since my hardware > seems >> to only open like this when specifiyong a 32bit or 24bit format. 24bit > is >> what my hardware actually supports (Realtek RC888). > > Very often 24bit means the 24 MSB of 32bit integer words, which PA > then exposes as s32 NE. How many of those bits are actually used are > exported as properties on the sink device however. (but even that is > not really that reliable, since DAC's generally cannot do more than > 20-22 bit. Thre's a physical limit somewhere in that area) > >> However when looking at output of pulseaudio -v I see: >> I: resampler.c: Using float32le as working format. >> >> Is PS resampling two times from for example 16bit to s32le to float32le? > > The speex resampler can only do 16bit integer NE and 32bit float > NE. That means we need to convert to either of these two formats > before doing the resampling step. > > Lennart > > -- > Lennart Poettering Red Hat, Inc. > lennart [at] poettering [dot] net > http://0pointer.net/lennart/ GnuPG 0x1A015CC4 > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at mail.0pointer.de > https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
