This file is indexed.

/usr/share/ambdec/presets/rectangle.ambdec is in ambdec 0.5.1-4build1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# AmbDec configuration
# Written by Makedec-0.8.0 at Sun Sep  4 22:38:52 2011

/description      1/sqrt(3) rectangle  --   max rV at LF, max rE at HF

/version          3

/dec/chan_mask    b
/dec/freq_bands   2
/dec/speakers     4
/dec/coeff_scale  fuma

/opt/input_scale  fuma
/opt/nfeff_comp   input
/opt/delay_comp   off
/opt/level_comp   off
/opt/xover_freq    300
/opt/xover_ratio   0.0

/speakers/{
add_spkr    LF     2.000     30.0      0.0    system:playback_1
add_spkr    RF     2.000    -30.0      0.0    system:playback_2
add_spkr    RB     2.000   -150.0      0.0    system:playback_3
add_spkr    LB     2.000    150.0      0.0    system:playback_4
/}

/lfmatrix/{
order_gain     1.00000  1.00000  0.00000  0.00000
add_row     0.353554  0.500000  0.288675
add_row     0.353554 -0.500000  0.288675
add_row     0.353554 -0.500000 -0.288675
add_row     0.353554  0.500000 -0.288675
/}

/hfmatrix/{
order_gain     1.41421  0.99985  0.00000  0.00000
add_row     0.353554  0.500000  0.288675
add_row     0.353554 -0.500000  0.288675
add_row     0.353554 -0.500000 -0.288675
add_row     0.353554  0.500000 -0.288675
/}


/end