bformenc
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## bformenc

bformenc — Deprecated. Codes a signal into the ambisonic B format.

## Description

Codes a signal into the ambisonic B format. Note that this opcode is deprecated as it is inaccurate, and is replaced by the much better opcode bformenc1 which replicates all the important features; also note that the gain arguments are not available in bformenc1.

## Syntax

    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

## Performance

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.

## Example

Here is an example of the bformenc opcode. It uses the file bformenc.csd.

Example 1246. 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

    ;bformenc is deprecated, please use bformenc1

    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>

## Credits

Author: Samuel Groner
2005

New in version 5.07. Deprecated in 5.09.

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