Connecting to the Audio Interface
The S/PDIF connectors are used to transmit digital audio data between digital
audio devices via an electrical signal. When connecting devices to the S/PDIF
jacks, the use of standard analog RCA audio cables is not recommended. For
reliable S/PDIF operation, 75-ohm coaxial (RG59) video cables are recommended.
The MIDI ports can be used for receiving MIDI time code (MTC), or sending and
receiving MIDI signals between your digital audio/MIDI sequencing software and
external sound modules, keyboards, MIDI controllers, etc. MIDI cabling is highly
standardized and widely available.
Word Clock (AudioFire8 and AudioFire12 only)
Next to the MIDI ports are the Word Clock connectors. These connectors allow
you to synchronize your Echo product to any other device equipped with a Word
Clock connector.
The Word Clock I/O uses a BNC connector. As with the S/PDIF I/O, a shielded
75-ohm (RG-59) coaxial video cable should be used. BNC connectors have been
widely used in the electronics industry for both video and computer networking.
However, computer networks use 50-ohm (RG-58) coaxial cables and not the 75-
ohm (RG-59) cable used by video. For reliable word clock operation, use only
video grade cables with your Echo product.
21
Connecting to the Audio Interface