Studio InterconnectionsVideoSyncMasterW/CVHSVTRDigital ConsoleDAWDA-88W/SY-88MicroLynx2MultitrackCDRecorderDATIF-88AEAESConverter
Clock SignalsClock signals are SPEED reference signals that are used in applications where the rate or speed at which data is transferred or output must remain constant.Clock signals can be used for both analog and digital applications.In digital audio applications the clock signal is know as Word Clock. In video applications the clock signal is know as House Sync, or Video Sync, or Black BurstClock Signals should not be confused with Timecode.
Digital Word ClockA square wave, clock reference signal for digital audio Word Clock is a speed referenceSample rate is derived from word clock signalAllows serial transmission between digital audio devicesTypically uses a 75 coaxial video cable with BNC termination. "BNC (British Navy Connector) is a bayonet-type connector, seen on professional video equipment. The male connector, usually mounted on the equipment, appears as a cylinder with a hollow pin in the center. The outer cylinder has two little nubs sticking out on opposite sides. The female connector, normally mounted on the cable, has an outer ring with slots on opposite sides which turns so that it can bayonet onto the nubs of the male connector, and has a smaller center pin which joins to the male's hollow center pin.
Word ClockA timing reference for digital audio serial transmissionsA square wave signal at the sample rateDefines the sample rate of the incoming signalUsed to derive the sample rate of incoming digital audioWord Clock is a speed referenceTypically on 75 coaxial video cable with BNC termination
M27 Digital Connections
Digital Audio Transmission FormatsDigital audio is transmitted from one device to another using a variety of formats. These formats have been developed to satisfy specific needs or applications. Each format typically specifies what type of cable and what type of termination is to be used. The most common of these formats are
Digital I/OAES/EBU2 channels of audio on one cableWord clock embedded (self clocking)Balanced cable (110 ), typically XLR connectors44.1kHz/48kHz, up to 24 bitsS/PDIFSemi-pro and consumer standard2 channels of audioWord clock embedded (self clocking)Unbalanced cable (75 ), typically RCA connectors44.1kHz/48kHz, up to 24 bitsCan also be optical cable with TOSLink connectors
ADAT SpecificsADAT (Alesis Digital Audio Tape) aka Lightpipe, Optical8 channels of audio (a multichannel interconnection)optical cable with Toslink (JIS F05) connectorsWord clock embedded44.1kHz/48kHz, up to 24 bits96kHz by combining 2 ports (participating manufacturers)
TDIF SpecificsTDIF (Tascam Digital Interface)16 channels of audio (a multichannel interconnection)8 channels Input / 8 channels outputMultiwire cable with 25-pin D-sub connectorsWord clock is an external connection, on 75 coaxial cable44.1kHz/48kHz, up to 24 bits
TDIF w/Separate Word ClockWord ClockTDIFIF88AEAES Converter
DA-88 Word ClockWord clockTDIFTDIF
The DA-88 In Detail
DA-88 Tape Path
DA-88 Head Assembly
TDIF Tascam Digital Interface
IF-88AE AES Converter
Yamaha DM SeriesO1V96DM1000O2R96DM2000
Yamaha DM Series Back PanelsO1V96DM1000O2R96DM2000
Yamaha DM2000 in Detail
DM2000 Back Panel
DM2000 Slot I/O
DM2000 Selecting Layers
Yamaha DM2000 Layers in M27Layer 1: Channels 1-8 = ProTools Analog Outs 1-8 Channels 9-12 = Microphone Inputs 1-4 Channels 13-16 = EmptyChannels 17-24 = DA-88 Analog Outs 1-8
Layer 2:Channels 25-48 = ProTools Digital Outs 1-24
Layer 3:Channels 49-72 = Empty
Layer 4:Channels 73-96 = Effects & Tape Returns
DM2000 LCD Display
DM2000 Digital I/O
Video House SyncA video waveform signal without video elements, often referred to as House or Sync or Black Burst or Video Sync
House Sync is a speed reference signal used as a control track on ALL video tape formats.
House Sync is used to synchronize video tape machines and processors to a common speed reference. In video facilities, House Sync is sent to all tape machines and video processors.
House Sync is embedded into the video signal (from a video camera) during recording. This composite signal creates a control track that defines the speed of the original recording. These camera tapes are called Source Tapes.
In post-production video applications, Master Tapes are blank tapes that have been formatted by striping them with House Sync and a black video signal. This process is called Blacking. Video editing is the process of transferring selected Source Tape material onto video Master Tapes. As with the Source Tapes, House Sync allows Master Tapes to synchronize to the common speed reference from the House Sync generator.
House sync DOES NOT CONTAIN TIME CODE! This is a common misconception.
Uses a "BNC" (British Navy Connector) connector.
House Sync & Word Clock Both are speed reference signals. They do not contain timing information such as Time Code or Sample Rate, rather they provide the basic speed reference to generate a timing signal.Sample Rate is derived from Word Clock. Frame Rate is derived from House Sync.