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Old 5th March 2018
  #15
Lives for gear
Quote:
Originally Posted by Folkie View Post
All of the Soundfield brand mics have
4 capsules. The newest (and highest
quality) Soundfield mic is the DSF-1/DSF-2) with phase accuracy to 15k.
Yes you're absolutley right - like I say its been a long time since I used ambisonics. A quick brush up shows that the 4 capsules in the Soundfield are the vertexes of a cube (8 vertixes) whereas in the Velan each pair of the three capsules is the X,Y, Z with the sum (or fraction thereof) being the W....
This looks liek a good resource :

A-format to B-format conversion

The summing for the axes in the soundfield appears to be this :

W' = FLU+FRD+BLD+BRU

X' = FLU+FRD-BLD-BRU

Y' = FLU-FRD+BLD-BRU

Z' = FLU-FRD-BLD+BRU

Whereas when I made the endoder for the Velan it was this :

Left + & - right = x
Front + & - Back = y
Top + & - bottom = z
All summed * 0.257 = w

Never used the bloody thing apart from once though !

Last edited by Gusss; 5th March 2018 at 09:57 AM..