I have changed the subject to reflect the questions
to change the application that opens types of files here is what to do I use column view for the file lists all the time

navigate to the file

say a MP3 file or a ms word file

we will do it to a MP3 file

so go to an MP3 file

then do command plus I to go to the get info dialogue

in this you have to use the vo keys to move right across the dialogue

you have to expand the discloser triangles

do this with the spacebar or vo keys space whichever you like


move across till you get to the box that says

open with  and make sure it says expanded discloser triangle

move across with the vo keys


there will be a popup button that probably says itunes

click on this with vo keys

move to say quick time

do vo keys space

a dialogue will pop up which asks you if you want to change all MP3 files to open in quick time

accept this and off you go

of course you have to press the play button in quick time to start the file

but you can play all MP3 from now on in quick time

by the way if you have play lists m3u lists

you can open these in quick time too and into gives you a pop up box with the tracks in it.

so you can move and chose tracks

quick time will play the whole list

I also use COG to play some files like aag and flaq


hope this helps

regards
Ian

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