Thank you for the clarification. Oscar <div class="gmail_quote">On Wed, Mar 31, 2010 at 12:39 PM, Lennart Poettering <<a href="mailto:lennart@poettering.net">lennart@poettering.net</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On Wed, 31.03.10 12:10, Oscar Eriksson (<a href="mailto:oscar.r.eriksson@gmail.com">oscar.r.eriksson@gmail.com</a>) wrote: > Hi, > > I'm curious about how the conversion from 32-bit float PCM to 16-bit fixed > PCM is done in PulseAudio. Or is it Alsa that takes care of this > conversion? </div>PA does. <div class="im"> > Are noise shaping and dithering involved? </div>No and no. I thought about adding at least dithering, but uh, I don't think this is really a priority for desktop audio. Dithering is primarily relevant for audio production which PA is unsuitable for anyway, and the operation is too CPU intensive to do it nonetheless. (ALSA doesn't do thopse things either in their converters) <div class="im"> > Also, how do I adjust the volume for optimum playback quality when playing > music? (I want to use the the full dynamic range) Should I use maximum ALSA > and PulseAudio volume when playing songs that have been normalized (Replay > Gain)? </div>For the sliders PA exposes 0dB is at maximum hardware volume, and the "base volume" is where the hardware 0dB is, for whatever that means. Hence normally you want to keep the volume below the base volume, at least when the dB labelling of the hardware sliders are correct. <a href="http://pulseaudio.org/wiki/WritingVolumeControlUIs#BaseVolumes" target="_blank">http://pulseaudio.org/wiki/WritingVolumeControlUIs#BaseVolumes</a> Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net <a href="http://0pointer.net/lennart/" target="_blank">http://0pointer.net/lennart/</a> GnuPG 0x1A015CC4 _______________________________________________ pulseaudio-discuss mailing list <a href="mailto:pulseaudio-discuss@mail.0pointer.de">pulseaudio-discuss@mail.0pointer.de</a> <a href="https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss" target="_blank">https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss</a> </blockquote></div>