System User Guide / Owners Manual

16
5. Pro Tools
AvidProToolsisbyfarthemostcommonDAW,warrantingaspecialsectionon
howtosetuptheCC1inaPTrig.Inourexperiencedescribedmethodistheset-up
thatleadstothebestsoundquality.Anydeviationfromthismethodmightgiveyou
stablesync,butwillprobablynotbesonicallyoptimal.
Pro Tools in music production, CC1 master
ProTools192interfacesfeaturea“LoopSync”functionwhereclockcablesarecon-
nectedinaring:every“LoopSyncin”isconnectedtothenextunit’s“LoopSync
out”,thelastunitconnectstothefirst.Likeinanycorrectclocksetup,oneunitis
masterandallothersslave.TheadvantageofLoopSyncisanyunitcanbedesig-
natedmasterandrunonitsinternalclock.Allothersslavetothatunit.TheLoop
Syncinputofthemasterunitisignoredandeffectivelyanordinarywordclockdaisy
chainresults.NowifProToolsistoslavetowordclock,theunitthatreceivesthe
wordclockalwaysbecomesloopmaster,theothersautomaticallyslavetoLoop
Sync.WecanmakeuseofthisfeaturebyfoolingthesystemintobelievethatLoop
Syncisinuse,whileactuallyastarclockdistributionisutilized.Starclockdistribu-
tionhastheadvantagethatitismorefailsafethandaisychainingandjittergainof
subsequentPLL’sisavoided.
•ConnectanoutputofCC1’sgroup2tothe“ExternalWordClock”inputofthefirst
unitinthechain(ifpresenttheSyncI/O,otherwisethefirst192).
•ConnecttheoutputsofCC1’sgroup1totheLoopSyncinputofeach“192”inter-
face.Every192getsitsownconnectiontotheCC1(stardistribution).Makesure
group1issetto‘x1’.
Incaseyouneedtorunhighersampleratesthan44.1or48kHz,onlysetgroup2
ontheCC1frontpanelto“x2”or“x4”andleavegroup1on“x1”.ThisbecausePro
Tools“ExternalWordClock”inputneedstoreceivetheactualsamplerate,butthe
LoopSyncinputsalwaysrunatthebaserate.
•Softwaresettings:
Setup – session setup
1.SetSyncsourceto“WordClock”.Thisconfiguresthefirstunittolocktoex-
ternalwordclockandtheotherstoloopsync(indicatorslightup).
Pro Tools in music production, CC1 slave
AnalternativesetupwhenusingaSyncI/Oasfirstunitinthechainistoassignthe
SyncI/OmasterandslavetheCC1toitsLoopSyncoutput.Theadvantageisthat