bformenc1 — Codes a signal into the ambisonic B format.
aw, ax, ay, az bformenc1 asig, kalpha, kbeta
aw, ax, ay, az, ar, as, at, au, av bformenc1 asig, kalpha, kbeta
aw, ax, ay, az, ar, as, at, au, av, ak, al, am, an, ao, ap, aq bformenc1 \
asig, kalpha, kbeta
aarray[] bformenc1 asig, kalpha, kbeta
aw, ax, ay, ... -- output cells of the B format.
aarray -- output array to hold cells of the B format.
asig -- input signal.
kalpha –- azimuth angle in degrees (anticlockwise).
kbeta -- altitude angle in degrees.
Here is an example of the bformenc1 opcode. It uses the file bformenc1.csd.
Example 87. Example of the bformenc1 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 ksmps = 32 nchnls = 8 0dbfs = 1 instr 1 ;without arrays ; generate pink noise anoise pinkish 1 ; two full turns kalpha line 0, p3, 720 kbeta = 0 ; generate B format aw, ax, ay, az, ar, as, at, au, av bformenc1 anoise, kalpha, kbeta ; decode B format for 8 channel circle loudspeaker setup a1, a2, a3, a4, a5, a6, a7, a8 bformdec1 4, aw, ax, ay, az, ar, as, at, au, av ; write audio out outo a1, a2, a3, a4, a5, a6, a7, a8 endin instr 2 ;with arrays (csound6) ;set file names for: S_bform = "bform_out.wav" ;b-format (2nd order) output S_sound = "sound_out.wav" ;sound output ; generate pink noise anoise pinkish 1 ; two full turns kalpha line 0, p3, 720 kbeta = 0 ;create array for B-format 2nd order (9 chnls) aBform[] init 9 ; generate B-format aBform bformenc1 anoise, kalpha, kbeta ;write out b-format fout "fout.wav", 18, aBform ;create array for audio output (8 channels) aAudio[] init 8 ;decode B format for 8 channel circle loudspeaker setup aAudio bformdec1 4, aBform ; write audio out fout S_sound, 18, aAudio endin </CsInstruments> <CsScore> i 1 0 8 i 2 8 8 e </CsScore> </CsoundSynthesizer>