<s>
The	O
Echo	B-Application
II	I-Application
is	O
a	O
plug-in	O
expansion	O
card	O
,	O
speech	B-Application
synthesizer	I-Application
card	O
for	O
the	O
Apple	B-Device
II	I-Device
and	O
Apple	B-Device
IIe	I-Device
personal	O
computers	O
that	O
allow	O
applications	O
to	O
use	O
speech	B-Application
synthesis	I-Application
.	O
</s>
<s>
The	O
Echo	B-Application
II	I-Application
provides	O
a	O
speaker/headphones	O
jack	O
on	O
board	O
,	O
with	O
a	O
physical	O
volume	O
control	O
adjustment	O
.	O
</s>
<s>
The	O
Echo	B-Application
II	I-Application
software	O
can	O
synthesize	O
either	O
unlimited	O
text-to-speech	B-Application
using	O
stitched	O
phonemes	O
,	O
or	O
play	O
back	O
raw	O
LPC	O
data	O
for	O
specific	O
words	O
,	O
with	O
resulting	O
higher	O
speech	O
quality	O
.	O
</s>
<s>
LPC	O
(	O
linear	B-Algorithm
predictive	I-Algorithm
coding	I-Algorithm
)	O
is	O
the	O
speech	B-Application
synthesis	I-Application
technology	O
used	O
,	O
which	O
allowed	O
applications	O
to	O
encode	O
speech	O
data	O
in	O
a	O
compact	O
form	O
.	O
</s>
<s>
The	O
Echo	B-Application
II	I-Application
uses	O
the	O
TMS	B-Application
5220	I-Application
LPC	I-Application
Speech	I-Application
Chip	I-Application
which	O
was	O
popular	O
in	O
other	O
speech	B-Application
synthesizers	I-Application
.	O
</s>
