If you are using FreePBX in an embedded enviornment, you may be interested in reducing the overall size of the files necessary for FreePBX. FreePBX uses sounds from the asterisk-extra-sounds package (from Digium), but doesn't necessarily need all 34M of the sounds.
As of FreePBX 2.5, you need the following sounds from the asterisk-extra-sounds package to be in /var/lib/asterisk/sounds:
activated
added
all-circuits-busy-now
an-error-has-occured
at-tone-time-exactly
call-forwarding
call-fwd-no-ans
call-fwd-on-busy
call-fwd-unconditional
call-waiting
cancelled
cannot-complete-as-dialed
check-number-dial-again
day
de-activated
disabled
do-not-disturb
enabled
enter-conf-pin-number
enter-num-blacklist
enter-password
ent-target-attendant
extension
feature-not-avail-line
for
from-unknown-caller
goodbye
ha/phone
if-correct-press
im-sorry
info-about-last-call
is-curntly-unavail
is-in-use
is-set-to
is
location
number
num-was-successfully
one-moment-please
please-enter-your
pls-try-call-later
pm-invalid-option
press-0
press-1
press-2
press-3
press-4
press-5
press-6
press-7
press-8
press-9
press-star
privacy-to-blacklist-last-caller
reception
sorry-youre-having-problems
speed-dial-empty
speed-dial
telephone-number
to-call-this-number
to-listen-to-it
with
your