SMF (Standard Midi File) 1 format to SMF 0 format converter using ALSA's arecordmidi

smf1to0.sh

#!/bin/sh
#
# Adapted from https://music.stackexchange.com/questions/39040/how-can-i-convert-a-standard-midi-file-from-type-1-to-type-0

if [ $# != 2 ] ; then
        echo "Usage: $0 infile.mid outfile.mid"
        exit 1
fi

arecordmidi -p 14:0 "$2" &
PORT=`aplaymidi -l | grep arecordmidi | cut -d " " -f 1` # to identify 'arecordmidi port 0' device (e.g. 129:0)
aplaymidi -p $PORT "$1"
kill %%