User’s Guide HDSP System RPM
© RME
10
8. Operation and Usage
8.1 Connections
The front of the I/O-box RPM has the microphone input, MIDI input and output, the headphone
output, and several status LEDs:
Microphone In
allows to connect a microphone via XLR or 1/4" TRS jack.
Using the
GAIN
knob the sensitivity is adjusted to match the currently used microphone.
The
CLIP
LED visualizes overload, caused by too high input level or wrong Gain adjustment.
The LED lights up 4 dB before reaching the highest possible (undistorted) level.
MIDI IN
and
OUT
represent the MIDI input and output, realized as 5-pin DIN jacks.
MIDI State
indicates sent or received data for the MIDI port
The red
HOST
LED lights up constantly when the power supply or the computer is switched on,
thus signalling the presence of operating voltage. At the same time it operates as Error LED, in
case the I/O-box wasn’t initialised, or the connection to the interface has been interrupted
(Error, cable not connected etc.). The latter causes the LED to flash. After the firmware has
been loaded into the I/O-box the LED extinguishes, thus signalling an error-free operation.
Phones
is a low impedance line output of highest quality, which can produce a sufficient and
undistorted volume even when used with low-impedance headphones.
The volume for the headphones is controlled with the
VOL
knob.
The back of the RPM has the 4 analog inputs and outputs and the power supply connector
AUX
(only needed in CardBus operation).
The
PHONO/LINE INPUTS 1/2
and
3/4
can be used with turntables (moving magnet) or Line-
based devices (CD player etc.). Operation is controlled in the Settings dialog.
OUTPUTS 1/2
are provided as both RCA jacks (unbalanced) and as stereo TRS jacks
(balanced).
OUTPUTS 3/4
are only available as RCA jacks (unbalanced).
The
hook
serves as strain relief. Originally only intended to secure the power supply cable
(simply tie it around the hook, or tie a knot around it), the hook is big enough to hold several of
the cables connected to the RPM.
