This file is indexed.

/etc/gnuradio/conf.d/gr-audio-alsa.conf is in gnuradio 3.7.10.1-2+b3.

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

The actual contents of the file can be viewed below.

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# This file contains system wide configuration data for GNU Radio.
# You may override any setting on a per-user basis by editing
# ~/.gnuradio/config.conf

[audio_alsa]

default_input_device = default
default_output_device = default
# period time in seconds
period_time = 0.010
# total buffering = period_time * nperiods
nperiods = 4
verbose = false