<s>
The	O
Bell	O
Telephone	O
Laboratory	O
's	O
Voder	B-Application
(	O
from	O
Voice	O
Operating	O
Demonstrator	O
)	O
was	O
the	O
first	O
attempt	O
to	O
electronically	O
synthesize	B-Application
human	I-Application
speech	I-Application
by	O
breaking	O
it	O
down	O
into	O
its	O
acoustic	O
components	O
.	O
</s>
<s>
It	O
was	O
invented	O
by	O
Homer	O
Dudley	O
in	O
1937	O
–	O
1938	O
and	O
developed	O
on	O
his	O
earlier	O
work	O
on	O
the	O
vocoder	B-Application
.	O
</s>
<s>
The	O
quality	O
of	O
the	O
speech	O
was	O
limited	O
;	O
however	O
,	O
it	O
demonstrated	O
the	O
synthesis	O
of	O
the	O
human	O
voice	O
,	O
which	O
became	O
one	O
component	O
of	O
the	O
vocoder	B-Application
used	O
in	O
voice	O
communications	O
for	O
security	O
and	O
to	O
save	O
bandwidth	O
.	O
</s>
<s>
The	B-Application
Voder	I-Application
synthesized	O
human	O
speech	O
by	O
imitating	O
the	O
effects	O
of	O
the	O
human	O
vocal	O
tract	O
.	O
</s>
<s>
Performances	O
on	O
the	B-Application
Voder	I-Application
were	O
featured	O
at	O
the	O
1939	O
New	O
York	O
World	O
's	O
Fair	O
and	O
in	O
San	O
Francisco	O
.	O
</s>
<s>
The	B-Application
Voder	I-Application
was	O
developed	O
from	O
research	O
into	O
compression	O
schemes	O
for	O
transmission	O
of	O
voice	O
on	O
copper	O
wires	O
and	O
for	O
voice	O
encryption	O
.	O
</s>
<s>
In	O
1948	O
,	O
Werner	O
Meyer-Eppler	O
recognized	O
the	O
capability	O
of	O
the	B-Application
Voder	I-Application
machine	O
to	O
generate	O
electronic	O
music	O
,	O
as	O
described	O
in	O
Dudley	O
's	O
patent	O
.	O
</s>
<s>
Whereas	O
the	O
vocoder	B-Application
analyzes	O
speech	O
,	O
transforms	O
it	O
into	O
electronically	O
transmitted	O
information	O
,	O
and	O
recreates	O
it	O
,	O
the	B-Application
voder	I-Application
generates	O
synthesized	B-Application
speech	I-Application
by	O
means	O
of	O
a	O
console	O
with	O
fifteen	O
touch-sensitive	O
keys	O
and	O
a	O
pedal	O
.	O
</s>
<s>
It	O
basically	O
consists	O
of	O
the	O
"	O
second	O
half	O
"	O
of	O
the	O
vocoder	B-Application
,	O
but	O
with	O
manual	O
filter	O
controls	O
,	O
and	O
requires	O
a	O
highly	O
trained	O
operator	O
.	O
</s>
