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EXi: MS-20EX
6–1c: VCA, VOLUME, and outputs
VCA IN jack
This Patch Panel modification provides a direct input to the
main VCA.
INITIAL GAIN input jack
The VCA is internally patched to the output of EG 2.
This jack allows an external controller to vary the VCA in
addition to EG 2.
When the sum of both controllers reaches 5 volts, no further
changes in volume will occur.
VOLUME
This controls the basic volume level of the MS-20EX. Note
that you can modulate this via AMS, for each individual
voice; for more information, see "Using EGs 3–6 to control
the amplitude" on page 265.
MIDI and volume
You can control the Program's overall volume via MIDI
using both Volume (CC#7) and Expression (CC#11).
When used one at a time, the two controllers work in
exactly the same way: a MIDI value of 127 is equal to the
VOLUME setting, and lower values reduce the volume.
If both CC#7 and CC#11 are used simultaneously, the one
with the lower value determines the maximum volume,
and the one with the higher value scales down from that
maximum.
SIGNAL OUT jack
On the original MS-20, this was the final output. With the
MS-20EX, you may find it useful for routing the overall
output signal back into the patch–such as for creating a
feedback loop.
Note that connecting to this jack does not mute the output
signal.
PHONES output jack
On the original MS-20, this was used for headphones (of
course!). With the MS-20EX, you can use it to route the
overall output signal back into the patch, as with the
"SIGNAL OUT jack," above.
Since its original purpose was to drive headphones, the gain
of the PHONES output is about 15dB higher than that of the
SIGNAL OUT. It also clips (with distortion) at around -5dB
below the max output level.
270
[POWER OFF, 0.01...10.00]
6–1d: MODULATION GENERATOR and
SAMPLE & HOLD
MODULATION GENERATOR (MG)
The MG has separate outputs for its two basic waveforms, so
that you can use both simultaneously.
For descriptions of the MG parameters, see "5–1b:
MODULATION GENERATOR (MG)" on page 263.
OUT jack (saw/triangle)
This is the output for the saw/triangle waveform. The signal
is centered around zero, from –5.00 to +5.00.
OUT jack (pulse/square)
This is the output for the pulse/square waveform. The signal
is unipolar, from 0.00 to 10.00.
Note: When used through AMS and EXTERNAL
MODULATION, the signal ranges for both the saw/triangle
and pulse/square are –10.00 to +10.00.
SAMPLE & HOLD
The SAMPLE & HOLD can generate a stepped output
from any varying input. You can use this to create random
filter or pitch effects, arpeggios, quantized LFOs or EGs, and
so on.
To use the SAMPLE & HOLD, there must be a trigger
source connected to the CLOCK input, and some sort of
signal (such as the NOISE GENERATOR, VCOs, AMS
sources etc.) connected to the IN jack.
When the CLOCK input is high, the OUT jack will carry a
slightly filtered version of the signal from the IN jack. If the
CLOCK input goes high for a very brief period of time, then
the input from that instant will be "held" at the output. The
output then stays "held" until the next time that the CLOCK
input goes high.
Important: the trigger at the CLOCK input must be very
brief. When using the MG Rectangle waveform as the
trigger, for instance, turn the WAVEFORM knob to the
extreme right position; this produces a very sharp pulse.
With this caveat in mind, you can use the MG or the LFOs to
trigger the CLOCK at regular intervals, or trigger it
manually using a switch, keyboard trigger out, or other
signal.
CLOCK input jack
This input controls the timing of the S&H, as described
above.
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