search for: blumlein

...9;s Linux stuff. The Vorbis "decoder" defaults to simple 4.0 if the player says its multi-channel but doesn't specify how many. We should be able to force select the simple 4.0 5.0 .. 7.0 Speaker Decodes do deal with older 'dumb' players. b) stereo support. >simulated blumlein are the simplest downmixes and could be added with a very minimal amount of code. They are also the least satisfactory. As most of the prize winning recordings made with Soundfield mikes have used them in plain stereo mode, usually Blumlein (eg the Chesky's) I don't think we should look do...

...prospect of people actually putting B-format audio (via the panner or directly input) into Ogg/Vorbis brings an interesting challenge: What do we do with the audio after decoding it? The following sane options exist: A) Simply output the B-format audio B) Produce a downmix 1) Mono. 2) Stereo blumlein crossed pairs 3) Stereo UHJ 4) binaural C) Produce speaker feeds 1) Fully generalizable speaker feed decoder (such as http://www.kokkinizita.net/linuxaudio/adec-pict.html) 2) G-format (fixed decode for the 5.1 layout) (A) is pretty much a no-brainer, and minus some polish on marking...

...sed briefly in the Ambisonic Surround Sound FAQ at: http://members.tripod.com/martin_leese/Ambisonic/faq_latest.html#SECTION12 The conversion of low-frequency amplitude differences at the speakers to phase between the ears is nicely explained at: http://uod-true-multi-channel-mixing.wikispaces.com/Blumlein+Stereo As the article points out, Blumlein described all this in his 1930s patent. The reason why movie surround systems only have one "sub bass channel" is also complicated. The key is to note that the correct name for the .1 channel is the Low Frequency Effects (LFE) channel. It is...