production standard to answer the proliferation of
multichannel playback formats
This 30-minute lecture, in French, presented a
historical overview of Ambisonics going back to the
group of students who initiated the
project in 1968 at Oxford in England. The
milestone that is the Soundfield microphone was
presented and the more recent incarnation of
tetrahedral microphone arrays like the SoundField SPS200 and the Core Sound TetraMic were
also mentioned to illustrate the filiation to the
first tetrahedral microphone
array in 1971.
The conversion from tetrahedral A-Format to B-Format was briefly
explained and it was also stated that the B-Format is expandable
to allow for greater performance in spatial
resolution. The Ambisonic Studio B2X plug-ins
were presented and a short audio demo followed
where the plug-ins were used in Steinberg Nuendo 4.2.2 in
conjunction with Plogue Bidule 0.9686 in OS X
10.5.6. The MacBook Pro was connected to
a RME Fireface 400 audio
This demo featured 1st order B-Format recordings
by John Leonard, available on Ambisonia,
and generative music with random positioning in
5th order planar B-Format. Note that the audio is
in mono in the video.
The lecture concluded with the statement that
Ambisonics B-Format is a future-proof surround
sound format since it can be adapted to any
multichannel speaker arrays.
The lecture included pictures courtesy
of Core Sound, SoundField and Stephen Thornton.