Outline of the TR-707
The Rhythm Composer TR-707
is
a
fully program-
mable rhythm machine
which allows
you to pro-
gram 4
Rhythm
Tracks
or
tunes (altogether
998
bars) from
up to
64 kinds of
user-created Rhythm
Patterns.
Each of the 15 digital drum voices
is
extremely
realistic and
has.
a
separate output
jack for individ-
ual mixing,
echo or equalizer.
An
optional
memory cartridge
plugs
directly into
the Composer for instantaneous
loading
and saving,
expanding the memory
capacity
by three
times.
A
Display window
helps your operation
to
great
extent,
MIDI
Bus
on the rear panel interfaces
with
other
MIDI devices to
allow control
of several
instruments.
Flam (Grace-note}
and Shuffle can
be
added
for
greater variety and
realism.
Now
we'll find our way
around
the important
controls
before creating and storing ('writing') our
own rhythm tracks. With
any computer
keyboard,
the same key
may
do
several different
jobs
depend-
ing on how it is used.
The Composer, which
is a
type
of
computer,
does
this also.
When switched on,
the Composer automatically selects (or 'defaults'
to!
Track
I,
"Default" means
the value
automatically selected
by
the
Composer overriden
by
your
command.
A Track is
a
complete tune in
rhythm, made
up
of
Patterns
strung
together (Patterns are covered later),
and
there
is a
demonstration
tune written on Track
1,11
and
HI.
The
SHIFT Key is used a lot.
It
enables
many
but-
tons and
keys
to
perform two functions instead of
just one.
The distinction is
clearly
marked on the
Composer: all functions
enclosed with lines and
highlighted are selected
while the SHIFT
Key is
held down. Ail other functions do not need
the
SHIFT Key. The only exception to this rule is the
ENTER
Key.
The Main
Keys
numbered
1
to
16 are used for
several tasks:
(i)
They produce the voices manually when
tapped.
(ii) They
divide
a
bar of
music into 16 parts,
and
enable voices
to be
written
into any of these
pans.
(iii)
They assign the
instrument voices in turn when
you
are writing:^-
(iv) They take care of all the "housekeeping" in-
volved in editing Rhythm Patterns
and Track,
such
as delete,
insert and
copy,
(v) They set the Accent on the major voices.
Above the
Main
Keys is the scale of time values with
a
red
LED beside each
to
indicate
which is in opera-
tion. These indicate -whether,
you
are..operating
in
2/4, 3/4, 4/4, 6/8
or multiples of
these times.
Default
value
is 4/4,
other times are
set with the
SCALE button.
Special
times
such
as 5/4, 7/4 or
any
other can be
set with the
LAST STEP
button. Mixed
times which
change each bar can also
be set
up.
We
use the CLEAR button
to erase rhythm patterns
we want to write over, the
FLAM
button for adding
Flam
or-
'grace
notes'
ahead of the main
beat,
and
INSTRUMENT
SELECT for
selecting each voice
in
turn when writing
Patterns,
Finally, don't worry
if
you can't get
an
immediate
response from
these
controls; sometimes they
operate
only under
special circumstances to
protect
your
data.
A full
explanation of ail controls
follows
in this Manual.
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