bformenc — Codes a signal into the ambisonic B format
aw, ax, ay, az bformenc asig, kalpha, kbeta, kord0, kord1
aw, ax, ay, az, ar, as, at, au, av bformenc asig, kalpha, kbeta, \
kord0, kord1 , kord2
aw, ax, ay, az, ar, as, at, au, av, ak, al, am, an, ao, ap, aq bformenc \
asig, kalpha, kbeta, kord0, kord1, kord2, kord3
aw, ax, ay, ... -- output cells of the B format.
asig -- input signal.
kalpha –- azimuth angle in degrees (clockwise).
kbeta -- altitude angle in degrees.
kord0 -- linear gain of the zero order B format.
kord1 -- linear gain of the first order B format.
kord2 -- linear gain of the second order B format.
kord3 -- linear gain of the third order B format.
Here is an example of the bformenc opcode. It uses the file bformenc.csd.
Example 50. Example of the bformenc opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in No messages ;-odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: -o bformenc.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 kr = 4410 ksmps = 10 nchnls = 8 instr 1 ; generate pink noise anoise pinkish 1000 ; two full turns kalpha line 0, p3, 720 kbeta = 0 ; fade ambisonic order from 2nd to 0th during second turn kord0 = 1 kord1 linseg 1, p3 / 2, 1, p3 / 2, 0 kord2 linseg 1, p3 / 2, 1, p3 / 2, 0 ; generate B format aw, ax, ay, az, ar, as, at, au, av bformenc anoise, kalpha, kbeta, kord0, kord1, kord2 ; decode B format for 8 channel circle loudspeaker setup a1, a2, a3, a4, a5, a6, a7, a8 bformdec 4, aw, ax, ay, az, ar, as, at, au, av ; write audio out outo a1, a2, a3, a4, a5, a6, a7, a8 endin </CsInstruments> <CsScore> ; Play Instrument #1 for 20 seconds. i 1 0 20 e </CsScore> </CsoundSynthesizer>