And this is the output from a direct console command:
gst-launch-1.0 filesrc location=/media/CE1B-6D79/Pearl\ Jam/Black.mp3 tee name=t ! queue ! audioresample ! alsasink device-name=jack t. ! queue ! audioresample ! alsasink device-name=BOSE
(gst-launch-1.0:1981): GLib-GObject-WARNING **: g_object_set_property: property 'device-name' of object class 'GstAlsaSink' is not writable
(gst-launch-1.0:1981): GLib-GObject-WARNING **: g_object_set_property: property 'device-name' of object class 'GstAlsaSink' is not writable
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/GstFileSrc:filesrc0: Internal data stream error.
Additional debug info:
gstbasesrc.c(2950): gst_base_src_loop (): /GstPipeline:pipeline0/GstFileSrc:filesrc0:
streaming stopped, reason not-linked (-1)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...