Alesis MPX User manual

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hstruciionMenual
ITUSTBUCTIOTUS:
TheMPXMidi
PatchTransmitter
permits
remote
patch
changes
toall Midi
equipment,The
MPXaddresses
Midi
programs'1-100
andtransmits
individ-
uallyorsimultaneouslyonall
16Midi
channels.
OPER!fiiION:
1. Install
4AA
penlight
batteries
intherearbatterycompartment,being
careful
tofollow
polarity
markings.
2. Connect aMidicable
fromMidi
outofthe
MPXtoMidiinofthereceivingunit.
3. Select the
Midi
channelyou
wishtotransmiton:
a)Press theCHAN
(Midi
channel)key
Then:
b)
Presstwonumberedkeysto
enterthe
desired
Midi
channel:01-16.
Or:
c)Press 00
totransmit
on
allMidichannelssimultaneously.
4. Selectthedesired
program:
Presstwonumbered
keys
correspondingto
theMidi
program
number.Pro-
grams
1-9areaccessedby
pressing
0'1,02,etc.
Program100isaccessed
by
pressing
00.Onceset,theMidichannel
isremembered
bythe
MPX
until
changed.
Thus,itis
unnecessaryto
reenter
the
Midi
channel
for
each
patch
changeuntiladifferentMidi
channel
is
desired.
Note;TheMPXisalways
bn.'
Randomkey
presses
duringtransportationorsetupcan
resettheMidi
chan-
nel.therefore.it'swiseto
set
theMidi
channel
at
thestartofeachsession.
5. Transmission o{
program
changewilloccurimmediately
uponenteringthe
seconddigit.
The
actualtiming
ofkey strokesallcnrstwomodesofpatch
transmission:
tode | -lf thef irst
keyisheldfor
at
least.6
seconds,thenthesecondkeystroke
(which
initiatestransmission)may
bemade atanylatertime.This
permits
cueingapatch
change
to
anychoseninstant.

rtfDtSPEC!
This
oroduct
transmits2bvtesontheselectedMidi
channel,The
first
byte
corre-
spondsto
@XHex,where
Xcorrespondstothechannelnumber3-1.Thesec-
ondbyteconsistsofabinarycodeequaltothe
patch
changecode
-1.
FgCNOT'CE
This
equipment
generates
andusesradio
frequency
energyand
ifnotinstalled
andused
properly,
thatis,in
strictaccordance
with
the
manufacturer'sinstruc-
tions,may
cause
interference
toradioandtelevisionreception.
lthas
beentype
tested
and
foundto
comply
with
the
limitsfora
Class
B
computing
device
in
accordance
withthe
specif
icationsin
Subpart
JofPart
'15
of
FCCRules,
which
aredesignedto
provide
reasonable
protection
againstsuch
interferencein
a
residentialinstallation.However,
there
isno
guarantee
thatinterference
willnot
occur
in
aparticular
installation.lf
thisequipmentdoescause
interferenceto
radioortelevisionreception,which
can
bedeterminedbyturningtheequipmentoff
andon,theuserisencouragedtotrytocorrectthe
interferencebyone
or
more
of
the
follonting
measures:
- Reorientthereceivingantenna.
-Relocate
the
product
withrespecttothe
receiver
-Move
the
product
away
from
the
receiver
-Hug theproduct
rnto
a differentoutletsothat
product
andreceiver areon
differentbranchcircuits.
lfnecessary,theusershould
consult
thedealeroranexperienced
radio/
television
technician
foradditional
suggestions.
Theusermay
find
the
following
booklet
prepared
bythe
Federal
CommunicationsCommission
helpf
ul:
"
How
to
ldentify
andResolve
Radio-TV
lnterference
Problems;'
This
booklet
is
available
from
the:U.S.Government
Printing
Off
ice
Washington,
D.C.20402
(Stock
Number004-000-00345-4)
|'JMTIEDWARBAI{TY;
ALESISwarrants
this
productto
be
free
ofdefects
inmaterialandworkmanshipunder
normal
use
for
a
period
of90days.The
term
ofthis
warranty
beginson
the
dateofsaletothe
purchaser.
Units
returned
forwanantyrepairto
ALESIS
oranauthorized
ALESIS
warranty
repairstationwill
be
repaired
or replacedatmanufaclurer's option,
freeofcharge.Thiswarranty
isvoidiffactory
determines
defect
tobetheresult
of
abuse,neglect,alterationorattempted
repair
byunauthor
ized
personnel.
ALESISassumes
noresponsibilityforloss
ordamage,direct
orconsequential,
thatmayresultfromthis
product
failingto
perform
atanytime.Allunitsreturnedto
ALESIS
oran
authorizedALESISrepair
facilitymust
beprepaid,
insured,
and
properly
packaged.
ALESIS
reserves
therighttoupdateanyunit
returnedforrepair.ALESISreservesthe
right
tochangeor
improve
designat
anytimewithout
prior
notice.
ALESISCORPORATION
. PO BOX39O8. LOSANGELES,CA9OOT8 . TELEX85531O
PRINTEDIN
US.A
I

Mode 2-lf the first
key
isheldforless
than
.6
seconds,then
thesecond
keystroke
must
occur
within
3 seconds,ortheMPXwillignore
thefirst
keystroke.
Thus,
anaccidentally
touchedkeywill
automatically
clearafter3
seconds,leaving
theMPXinready
status.
6. lf
you're
in
doubtabout
thecurrent
statusof
theMPX,
press
the
CLR
(clear)
key
prior
toinitiating
any
entry
The
CLR
key
clearsany
pending
patch
trans-
mission
entrieswithout
affecting
theselectedMidi
channel.
APPL|CAT'OTS..
The
MPX
provides
remote
accesstoMidi
program
changeswithout
the
user
having
tobenear
thereceiving
units.
This
allows
great
freedom
inrecording,
broadcast,
and
stage
situations.TheMPX
also
provides
program
change
capa-
bilityformusicians
whoseinstruments
don't
incorporate
Midi
patch
change
(such
as
guitar,
wind
instruments,
drumsand
percussion)
yet
need
toaccess
remote
Midi
gearon
stageorinthe
studio.In
complexkeyboard
setupswhere
program
change
capabilityisalreadyincorporated,
theMPX
offers
a much
higher
degreeof
patch
changeflexibility
in
that
it
cantransmitto
100
Midi
pro-
grams
onall16Midi
channelsindividually
orsrmultaneously.
Thus,
patch
change
schemes
can
besuperceded
atwillandMididevices
can
beorganized
in
groups
according
to
Midichannel.
FEATUBES!
Atthe
heart
oftheMPX
isa
cMos microcomputer.
lts
extremelylow
power
con-
sumption
andtheMPX's
unique
circuit
design
offer
batterylife
onthe
orderof2
years
undernormal
service.When
anykey
ispressed,
themicro-computer
draws
power
from
the
batteries
onlylong
enoughtorecognize
thekey
being
pressed,
and
transmit
theMidi
data,whereupon
themicrocomputer
goes
to
'sleep.'
lfa keyis
inadvertently
pressed
for
extended
periods
oftime,
the
microcomputer
will
recognize
this
conditionand
go
tosleep
topreserve
the
batteries.when
thekeyis
released
theMPXwillreturn
tonormalreadystatus.
PAECAUT'OTUS;
lfthe
MPXis
tobeunusedfor
extended
periods
oftime
(ayear
ormore;
afew
months
in
extremelyhot,
coldorwet
climates),we
stronglyrecommend
that
you
remove
thebatteriesfrom
the
unit.Corrosiveleakage
from
exhausted
batteries
candamage
thebattery
contacts
andelectronic
circuitsinside
theMPX.