wavesurfer 1.8.8p6 not usable on osx

Wavesurfer 1.8.8p6 can not be executed on OsX.
The lauch generate this error :
jerome$ /Applications/WaveSurfer\ 1.8.8p6.app/Contents/MacOS/WaveSurfer
dlopen(/Applications/WaveSurfer 1.8.8p6.app/Contents/lib/snack2.2/libsnack.dylib, 6): Library not loaded: /usr/local/opt/portaudio/lib/libportaudio.2.dylib
Referenced from: /Applications/WaveSurfer 1.8.8p6.app/Contents/lib/snack2.2/libsnack.dylib
Reason: image not found
while executing
"load {/Applications/WaveSurfer 1.8.8p6.app/Contents/lib/snack2.2/libsnack.dylib}"
("package ifneeded snack 2.2" script)
invoked from within
"package require snack 2.2"
(file "/Applications/WaveSurfer 1.8.8p6.app/Contents/Resources/Scripts/wsurf/wsurf.tcl" line 9)
invoked from within
"_source {/Applications/WaveSurfer 1.8.8p6.app/Contents/Resources/Scripts/wsurf/wsurf.tcl}"
("uplevel" body line 1)
invoked from within
"uplevel _source $args"
(procedure "source" line 5)
invoked from within
"source {/Applications/WaveSurfer 1.8.8p6.app/Contents/Resources/Scripts/wsurf/wsurf.tcl}"
("package ifneeded wsurf 1.8" script)
invoked from within
"package require -exact wsurf $version"
(file "/Applications/WaveSurfer 1.8.8p6.app/Contents/Resources/Scripts/app-wavesurfer/wavesurfer.tcl" line 2582)
invoked from within
"source [file join [file dirname [info script]] app-wavesurfer/wavesurfer.tcl]"

This is because portaudio has not been installed on the computer. That can be resolved installing the library :
brew install portaudio

Is that normal that this dependance has to be completed?

Thanks for the maintaining of this VERY USEFUL software.