D19 MicVALVE
E2/2 Operation
Date printed: 9.2.2000
[4]...[6] Valve Dignifier
Operative only if the function VALVE [8] is active.
[4] Bass Warmth
The sound of low frequencies becomes rounder; bass has more depth; vocals
have more body; percussive instruments are less aggressive.
The group delay behaviour due to AC coupling of the stages is different in
tube amplifiers.
The “Bass Warmth” control allows to select the frequency range
(10...200 Hz) within which the effect is active.
[5] Angel Zoom
Adds transparency and clarity to vocals; emphasizes the solo instruments.
Valve amps have a characteristic response, mid-frequency harmonic content
is emphasized.
[6] Valve Drive Gain/Clip
Tight, full sound; the sound will be harder/softer.
The harmonics spectrum of a delicately overloaded valve amplifier is com-
pletely different from an overloaded transistor stage.
The “Gain” control adjusts a gentle overload while the odd-harmonics con-
tent can be adjusted with the “Clip” control.
[7] Line Out
Output level setting, calibrated in dBu per full scale (dBu FS). Range: 4...24
dBu FS.
[8] VALVE
Toggle key for inserting the Valve Dignifier stage into the audio path of the
desired channel.
The “VALVE” LED is on when the Valve Dignifier stage is active.
[9] INSERT
INSERT function.
First key pressure: INSERT POST VALVE, the Insert Send is tapped
after
the valve stage (display: “INS”); the Insert Return is
directly
fed to the Line
and AES/EBU outputs.
Second key pressure: INSERT PRE VALVE, the Insert Send is tapped
be-
fore
the valve stage (display: “INS” and “PRE”); the Insert Return is fed
via
the valve dignifier stage
to the Line and AES/EBU outputs.
Third pressure: INSERT OFF, the input signal is fed via the valve dignifier
stage (if active) to the Line and AES/EBU outputs (also the Insert Send out-
put receives this signal; display: none).
Insert Send and Insert Return are electronically balanced and equipped with
XLR connectors.
[10]
ROUTING
Selector for the channel routing when using one of the (optional) TDIF or
ADAT digital interfaces. Each input channel can be switched to one of the
channels 1...8 of the multichannel interface. If desired, also a mono mix is
possible by selecting the same output channel for both input channels.
[11] 48 V
Toggle key to activate the 48 V phantom power supply for the desired mi-
crophone channel.
Can be operated only if the input gain selector is in Mic position. The
setting remains stored when switching over to a line gain setting.
[12]
Activates the high pass filter on the microphone inputs of the desired chan-
nel. Cut-off frequency (–3 dB point) 75 Hz, slope 12 dB/octave.
Can be operated only if the input gain selector is in Mic position. The
setting remains stored when switching over to a line gain setting.
