Yamaha Vl70m User Manual

107
2. Add all the converted numbers.
3. Divide the total by 128 and note the remain-
der.
4. Subtract the remainder from 128. The result
is the checksum.
5. Convert the decimal checksum back to
hexadecimal format using the above chart.Troubleshooting
The VL70-m is a very versatile tone generator
with many features and functions that affect
operation. In many cases, what appears to be a
fault with the VL70-m can actually be traced to an
improperly set parameter or something as simple as
a bad...

108
Symptom
• No sound.
Possible Causes
• Is the amplifier/mixer power turned on?
• Is the amplifier/mixer volume set to an appro-
priate level?
• Is the VL70-m volume control set to an appro-
priate level?
• Are the VL70-m outputs properly connected to
the amplifier/mixer inputs?
• Are the connection cables shorted, open, or
otherwise faulty?
• Is the HOST SELECT switch set appropriately
for your system (page 20)?
• Is the echo back (or MIDI THRU) function on
your computer or sequencer set properly?
•...

109
Symptom
• No effects.
Possible Causes
• Are the effect send levels set properly (pages
35 and 39)?
• Are the effect return levels set properly (pages
32, 33 and 41)?
• Is “NO EFFECT” or “THRU” selected as the
effect type (pages 90 – 92 and 94)?
• If distortion is being used, is the distortion part
turned “off” (page 94)?
Symptom
• A connected breath controller has no effect.
Possible Causes
• Is the Breath Mode parameter set properly
(page 96)?
• Is the breath control number set properly  (page
96)?...

110
Answers to Some Com-
mon Questions
1. The VL70-m is a monophonic tone generator.
Why is the “poly” mode initialy selected
when the VL-XG sound module mode is
engaged?
This is to provide compatibility between the
currrent XG format and future polyphonic VL-
series tone generators. It also provides a certain
degree of compatibility to allow playback of
VL-XG song data on existing tone generators
which do not feature the VL-XG extension.
Specifically, to switch the VL70-m to the mono
mode a “mono mode”...

111
6. Why do some bowed string instrument voices
tend to “squeek”?
As anyone who has played (or tried to play) a
real violin knows, these instruments naturally
tend to squeek if not properly controlled. The
same occurs with S/VA synthesis. As with a
real bowed string instrument, bow speed and
pressure must be properly controlled in the
VL70-m to produce the desired sound. Bow
speed is usually controlled either via breath
control or an expression pedal. Bow pressure is
controlled via control number 13:...

112
Error Messages
When an operational error or other problem
occurs, the VL70-m will display one of the
following error messages to inform you of the
problem.
Battery Low!
The internal backup battery needs to be replaced.
Have the battery replaced by qualified Yamaha
service personnel.
Illegal Data!
A data error has occurred durinng MIDI data
reception. Try receiving the data again.
MIDI Buffer Full!
The MIDI receive buffer is full. Reduce the
amount of data being transmitted to the VL70-m.
HOST is...

113
Specifications

 Tone  Generator
Type S/VA (Self-oscillating Virtual
Acoustic Synthesis: VLR Algo-
rithm)
Modifiers Harmonic Enhancer
Dynamic Filter
Equalizer
Resonator
Effects Reverb: 12 types
Chorus: 10 types
Variation: 44 types
Distortion: 3 types
Polyphony 1 note (monophonic)
Sound Module Modes
Voice Mode
VL-XG Mode
(VL extension for XG)

 Memory
Preset 256 voices (including 137 VL-XG
voices)
Custom 6 voices
Internal 64 voices

 Panel Switches
PLAY
EDIT
UTIL
EFFECT
MODE
BREATH
MIDI/WX
ENTER
EXIT...

114
AAbsorption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
Absorption  Control  Change  Number . . . . . . . . . . . .  64
Absorption  Control  Depth . . . . . . . . . . . . . . . . . . . . .  64
Absorption  Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . .  65
Aftertouch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
Aftertouch  Filter  Control . . . . . . . . . . . . . . . . . . . . . .  53
Aftertouch  LFO  Pitch  Modulation . . . . . ....

115
HHarmonic Enhancer Control Change Number . . . . .  62
Harmonic  Enhancer  Control  Depth . . . . . . . . . . . . . .  63
Harmonic  Enhancer  Curve . . . . . . . . . . . . . . . . . . . . .  63
Harmonic  enhancer . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
Headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
High  Note  Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  81
HOST  SELECT  switch . . . . . . . . . . . . . . . . . . . . . . . . ....

116
UUTIL  button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
Utility  mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  97
VVALUE  buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
Variation  connection  mode . . . . . . . . . . . . . . . . . . . .  93
Variation  pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  93
Variation  parameters,  type  specific . . . . . . . . . . . . . .  92
Variation  return . . . . . . ....