On Thu, 13.11.08 20:41, Dom H (speedsix.lists at googlemail.com) wrote: > Hi all, > > I believe I'm correct in saying Pulse doesn't support DD/DTS > passthrough (yet) so what I want my system to pass the decoded output > to my amps analogue inputs. I don't think this is a problem but I want > it setup in a way that mimicks my amps decoder and I'd like to know if > it's possible. > > My amp is configured with 4 speakers (no centre) and each is set to > what the amp calls 'small' i.e all bass output below the crossover > frequency is passed to the sub ASWELL as the discrete LFE channel. > Centre information is mixed into FL & FR speakers. > > Now I know a 4.1 setup is possible in Pulse with a config line like; > > load-module module-alsa-sink device_id=0 channels=5 > channel_map=front-left,front-right,rear-left,rear-right,lfe > > > The problem is, I'm assuming this is passing full range signals to the > main speakers and only the discrete LFE track to the sub, this also > suggest to me that playing audio tracks that don't have a discrete LFE > track (2ch music for example) would not output anything to the > subwoofer? In .13 we do not synthesize LFE anymore by default. Previously (and still now if you enable some config option) we would mix LFE from all other channels. We did never apply a lowpass however. In .13 the LFE channel will thus only get silence if you play a stream without LFE data and it is up to the hardware you have connected to your sound card to synthesize it if it wants to. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net ICQ# 11060553 http://0pointer.net/lennart/ GnuPG 0x1A015CC4
