bad environment variable in padsp script

[Stephen Isard]

On jammy 22.04 LTS. I need padsp for an old program that writes to /dev/dsp. The /usr/bin/padsp script from pulseaudio-utils 1:15.99.1+dfsg1-1ubuntu2.2 has the lines
if [ x"$LD_PRELOAD" = x ] ; then
   LD_PRELOAD="/usr/\\$$LIB/pulseaudio/libpulsedsp.so"
else
   LD_PRELOAD="$LD_PRELOAD /usr/\\$$LIB/pulseaudio/libpulsedsp.so"
fi
I don't know where it is supposed to be picking up a value for $LIB, but it isn't working. I get an error message: ld.so: object '/usr/\788488LIB/pulseaudio/libpulsedsp.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
The libpulsedsp 1:15.99.1+dfsg1-1ubuntu2.2 package put libpulsedsp.so in /usr/lib/x86_64-linux-gnu/pulseaudio and if I edit that into the script in place of the call to $LIB, everything works. So I think it is just a problem with the use of LIB in the script.