Roland Sound Canvas Digital SC-D70 Owner's Manual page 14

Names and Functions
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4. Audio Output 2 Jacks
As with the audio output 1 jacks, these jacks always output
DIGITAL and INST+WAVE regardless of the recording source
selection. The output level of these jacks is not affected by the
VOLUME knob.
5. Digital Input Connector (Optical)
Connect an optical cable here if you wish to input a digital audio
signal from an audio device such as CD/MD/DAT.
6. Digital Output Connector (Optical)
Connect an optical cable here if you wish to output a digital audio
signal to a digital recorder such as an MD or DAT.
7. Digital Input/Output Select Switch
When using the digital input/output connectors, this switch selects
whether to use optical or coaxial. It is not possible to use optical and
coaxial simultaneously.
8. Digital Input Connector (Coaxial)
Connect a coaxial cable here if you wish to input a digital audio signal
from an audio device such as CD/MD/DAT.
9. Digital Output Connector (Coaxial)
Connect a coaxial cable here if you wish to output a digital audio
signal to a digital recorder such as an MD or DAT.
10. USB Connector
The SC-D70 can be connected to your computer via a USB cable to
transfer audio data and MIDI data. This connector will function when
the SC-D70 is in USB mode.
11. MIDI IN Connector
MIDI messages received from another MIDI device will be sent to the
computer in USB mode, or to the internal sound generator in MIDI
mode. For details refer to USB mode and MIDI mode (p. 39).
12. MIDI OUT Connector
This connector transmits MIDI messages to other MIDI devices.
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