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Lan House Concert

Giuliano Obici

Group Mobile, LAMI, ECA

Music Department

University of So PauloSo Paulo, ra!il

"iuliano#usp$br

Flvio Luiz Schiavoni

Group Mobile, LAMI, IME

Computer Science Department

University of So PauloSo Paulo, ra!il

fls#ime$usp$br

Abstract

Concerto para Lanhouse1 %Lan&ouse Concert' is an

au(iovisual installation for computers connecte( to a

local area net)or* %LA+, commonly use( in internet

cafes'$ &e )or* arose from e-periments un(ertoo*(urin" au(io an( interactive vi(eo )or*s&ops an(

&ac*labs in rooms of free internet access t&rou"&outra!il$

Keywords

+et)or* Music, Internet Cafe, Meta.instrument, Me(ia

Art$

1 Introduction

Internet Cafe, popularly calle( in ra!il Lan&ouse, is a

commercial venue provi(e( )it& a local computernet)or* %Local Area +et)or* . LA+' connection )it&

Internet$ Initially t&ey offere( internet connection,net)or* "ames an( soft)are in "eneral, c&ar"in" a rate

proportional to t&e time of use$/0ver time, t&ey be"an tooffer office.relate( services %printin", scannin",

p&otocopyin", etc$' an( basic courses for be"inners in

t&e use of computers an( t&e internet$

In ra!il t&ere are about /$111 movie t&eaters2, /$311

boo*stores, 4$111 public libraries an( 516$ 111 internet

cafes$7 Given t&is lar"e number, internet cafes are no

lon"er seen e-clusively as a space of "ame an( internetaccess an( be"an to be treate( as 8convenience centers

offerin" services, culture an( e(ucation$84&ey occupy a

si"nificant role in cultural (iffusion, confi"urin" a ne)

5 9i(eo an( informations

&ttp:;;"iulianobici$com;site;concerto.para.lan&ouse$&tml %accesse(5

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e-ercises )it& t&e participants usin" t&e computer

net)or* to e-plore possibilities of )or*in" )it& more

t&an one computer$ &e initial intention )as to createau(iovisual instruments in PD an( provi(e a frame)or*

for collective performance usin" all t&e t)enty.ei"&t

computers in t&e room connecte( to a net)or* local$ Still

in t&e room, t&e result of t&ese e-ercises )oul( be s&o)nat t&e en( of t&e )or*s&op as a performance.installation$

&e "reatest (ifficulty in t&ese first tests )as to

establis& connection )it& all mac&ines$ &e stream fromt&e net)or* provi(e( by t&e obFects an( +etSen(

netreceive PD reuire( t&at a mac&ine s&oul( fulfill t&e

role of server an( be responsible for t&e entireconnection$ &at implie( confi"urin" every mac&ine,

fin(in" t&e IP of eac& one, establis&in" a connection

bet)een t&e /6 stations )it& t&e server t&at processe(

an( (isplaye( sc&e(ules$

fi"$ 5 .Arran"ment of SESC Pompeia computers

H&ile testin", t&e net)or* bro*e (o)n a fe) times,

causin" some computers to lose t&eir connection$ 0n t&e

last (ay of t&e )or*s&op, an( after several attempts, )emana"e( to establis& a stable connection )it& all

computers for some time$ He invite( people )&o )ere

t&ere to )atc& t&e installation.performance$ At t&e time

of presentin" t&e system cras&e( a"ain an( )e (i(ntmana"e to reestablis& it on time$ otal frustration, )&ic&

lea( to a fe) uestions$ H&at &appene( for t&e net)or*

to fall H&at )as t&e net)or*s problem Jo) coul( t&econnection be simplifie( Jo) coul( a net)or*in"

system be set up )&ic& (i(nt nee( so muc& time for

confi"urin" an( testin"

In t&is first e-periment, t&e aest&etic proce(ures )erevery simple$ &e monitors )or*e( as lin*in" lamps

)&ic& )oul( turn on an( off seuentially after ran(omly

sortin" out colors for t&e screens$ &e i(ea )as to create

effects of optical illusion relate( to movement )&ileusin" t&e computer screens as sync&roni!e( li"&ts$

2.1.1 Considerations and possiblediagnosis

Durin" t&e first e-periment, t&ere )as

insufficient time to establis& sync&roni!ation

relations&ips bet)een soun( an( ima"e, or even to

create somet&in" more elaborate for t&e net)or*system$ &is occurre( because t&e access an( use

of t&e room for tests at SESC )as limite( by t&e

operational (ynamics of t&e space, as it )or*e( asa Lan&ouse %internet cafe' )it& a continuous flo)

of people )&ic& ma*es any testin" unviable$

elo) are some consi(erations:

. inability to ma*e tests before&an( on t&e spotB

. Unfamiliarity )it& t&e SESCKs LA+B

. E-istence of clone( mac&inesB

. Different operatin" systems %Curumim,

Ubuntu

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Consi(erin" t&e various problems mentione( before, it

became necessary to con(uct tests in an place offerin"

bot& more control an( time$ &e follo)in" e-periments)ere (one in t&e laboratory of t&e Computer Center for

E(ucation %CEC' at t&e Institute of Mat&ematics an(

Statistics %IME' at t&e University of So Paulo$ &e main

operatin" system )as Debian an( some basic (ifficultiesarose (urin" t&e installation of P( e-ten(e( 1$7/$4

ma*in" it )as necessary to compile some libraries$

&e obFective of t&is sta"e )as to simplify t&einstallation monta"e$ Contrary to )&at &appene( before,

)e no) teste( ot&er net)or* obFects %netclient an(

netserver' enablin" eac& station to connect to t&e server$o connect all no(es of t&e net)or* it )as sufficient to

*no) only t&e IP of t&e server$ &e (ata flo) )as also

simplifie( by sen(in" t&e same list of comman(s to all

computers connecte( to a broa(cast transmission mo(e$In t&is )ay, eac& computer )as responsible for selectin"

t&e part of t&e messa"e allocate( to it$

At t&e CEC soun( test )asnt carrie( out by lac* of

spea*ers bot& in t&e room an( in t&e computers$ &etests focuse( on resolvin" t&e issue of net)or*in" an(

some computer sync&roni!ation aspects, suc& as latency

an(, especially, ima"e an( movement.relate( effects$

!!1! Considerations and "ossible dia%nosis

Alt&ou"& some circumstantial (ifficulties suc& as t&e

confi"urin" pac*a"es to install t&e PD, or not bein" yet

able to test t&e sync )it& soun(, t&e pro"ress an( resultsat t&is sta"e )ere positive in comparison to t&e first

e-perience, an( Fustifie( by t&e follo)in" aspects:

. smaller amount of computersB

. better control of t&e net)or*B

. enou"& time to test t&e confi"uration of t&e

mac&inesB

. simplification of t&e connection bet)een t&e

mac&ines an( netclient ; netserver$

!& 'hird a""roach# sound and video&e follo)in" t&ree tests )ere con(ucte( (irectly in

t&e )or*s&op room of MIS )&ere t&e installation

occurre($ &e lab computers )ere iMacs$ He installe(

t&e PD e-ten(e( 1$7/$4 an( be"an to perform t&e tests$

&e main obFective at t&is sta"e )as to establis& a

relations&ip bet)een soun( an( ima"e, e-plorin"

aspects of spatial sync&rony$ He &a( some problems

)it& t&e soun( car( an( t&e ua(rap&onic system &a(

to be a(apte( for stereo$

&e (iffusion of soun( in t&e first part of t&esc&e(ule, use( only t&e computers spea*ers to

emp&asi!e sync&rony )it& t&e ima"e$ As t&e screen lit

an( erase( at t&e same time, it ma(e &ear( or

silence( t&e computers spea*ers$

fi" 2$ Arran"ement of computers MIS

&e effect )as one of sync&rony an(

movement bet)een bot& li"&t an( soun( in t&e

room$ In t&e secon( part, t&e computer spea*ers

)ere turne( off an( t&e soun( )as broa(cast

only by t&e ua(rap&onic system of t&e room$

fi" 7$ 5apart of installation MIS

!&!1 Considerations and "ossible

dia%nosis

In t&is sta"e, t&ere )ere little problems inrelation to t&e final results, only a fe) unforeseen

aspects suc& as:. t&e net)or* (i( not )or* initially because it

)asnt alone$ &e solution foun( )as to(isconnect t&e LA+ from t&e e-ternal net)or*B

. menu bar of t&e GEM )in(o) )as appearin"

even in fullscreen mo(e$ &e solution )as to &i(e

t&e menu bar of t&e @in(er on t&e MacB

ua(rap&onic soun( system (i( not )or*

an( )as a(apte( to stereo mo(e$

& Future initiatives and (inalconsiderations

&e LA+ is a presence in several areas: offices,

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sc&ools, universities, companies, telecenters, me(ialabs,

cultural centers, amon" ot&ers$ 0ne of future

(evelopments of Concerto para Lanhouse )oul( be tota*e on a si"nificant number of initiatives, (ocument

t&em an( provi(e t&em in )ays t&at can be repeate( an(

a(apte( to (ifferent confi"urations, platforms an( places$

Also as future (evelopments )e inten( to e-plore

various resources t&at can offer a local net)or*$ A fe)

uestions remain: )&at )oul( t&e results be li*e in ot&er

net)or* topolo"ies %rin" or bus' H&at elements coul(be e-ploite( aest&etically in terms of soun( an( ima"e

H&at strate"ies of interaction an( automation is it

possible to establis&

fi" 4$ /apart of installation MIS

In anot&er aspect, even t&ou"& it isnt t&e case in t&ispresent )or*, it seems provocative to use t&e LA+ to

(esi"n )or*s of lar"er proportions$ Given t&e

computational costs involve( in real time ima"e an(

au(io processin", usin" a computer net)or* can offer

ot&er types of processin" possibilities an( a "reaterscalability of computational resources$

Different from proposals t&at involve t&e Laptop

0rc&estra %L0r*'6 . )&ose (esi"n ret&in*s t&e place ofmusical performance an( t&e use of t&e computer as a

meta.instrument in a station compose( by lou( spea*ers

an( soun( car( )it& t&e presence of musicians on sta"e

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Conference$

O/ Ale-an(re arbosa or"$ $%/151' Pesuisa

sobre o uso (as tecnolo"ias (a informao e (a

comunicao no rasil : IC lan&ouses /151$ So

Paulo: ComitQ Gestor (a Internet no rasil, /151$

O2 Dan rueman %/11'$ H&y a laptoporc&estra$ 0r"anise( Soun(, 5/, pp 55.5