whitespace in filenames

[Louis-David Mitterrand]

Hello,

I've got these rules to transcode my .flac music files to .mp3:

        FLACS := $(shell find ./flac -name "*.flac" -print)

        MP3 := $(patsubst ./flac/%.flac,./mp3/%.mp3,$(FLACS))

        ./mp3/%.mp3: ./flac/%.flac
                @[ -d $(dir $@) ] || mkdir -p $(dir $@)
                @echo $(basename $@) | (IFS=/ read form genre artist album 
title; \
                flac -cds $< | lame --tg $${genre:-NIL} --ta $${artist:-NIL} \
                --tl $${album:-NIL} --tt $${title:-NIL} --preset fast standard 
- $@ )


This works fine _except_ when there are spaces in .flac filenames, for
example:

        make: *** No rule to make target 
`flac/classical/dvorak_antonin/complete_piano_trios-beaux_arts_trio/Beaux', 
needed by `all'.  Stop.

Where should I add quotes to my rules to make them work with filenames
with spaces?

Thanks,