gistfile1.txt

nmap <leader>ap :call Abc2midi()<CR>
function! Abc2midi()
    let midi_file_name = shellescape(expand("%:p:r").'.mid')
    let abc_file_name = shellescape(expand("%:p"))
    let cmd = 'abc2midi '.abc_file_name.' -o ' . midi_file_name
    silent call system(cmd)
    let play_cmd = 'timidity '.midi_file_name
    silent call system(play_cmd)
    let rm_cmd = 'rm '.midi_file_name
    silent call system(rm_cmd)
endfunction