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17
Overview of the JUNO-G
Broadly speaking, the JUNO-G consists of a controller section, a
sound generator section, and a song recorder section.
fig.BasicStruct.e
Controller Section
This section consists of the keyboard, pitch bend/modulation lever,
panel knobs and buttons, and D Beam controller. It also includes any
pedals that may be connected to the rear panel. The performance
information generated when you do things such as press/release a
key, or depress the hold pedal is converted into MIDI messages and
sent to the sound generator section, song recorder section, and/or an
external MIDI device.
Sound Generator Section
The sound generator section produces the sound. It receives MIDI
messages from the controller section and song recorder section and/
or from an external MIDI device, generates musical sound according
to the MIDI messages that were received, and outputs the sound
from the output jacks or headphones jack.
Song Recorder Section
This consists of MIDI tracks, which record keyboard and controller
operations as MIDI messages, and audio tracks, which record the
performance data (sample events) used to trigger audio phrases
(samples). The recorded data is sent to the sound generator section,
reproducing the performance. MIDI messages recorded on MIDI
tracks can also be transmitted from the MIDI OUT connector to
control external MIDI devices.
Audio Track Recording
Audio track recording lets you capture sound from a CD player or
microphone connected to the audio input jacks into the sound
generator section as a sample. Performance data for that sample is
recorded on the song recorder’s audio track as a sample event.
The captured sample can be used in an audio track, or used in the
same way as a sound generator waveform. You can also record the
performance of the internal sound generator as a sample.
The JUNO-G can load WAV or AIFF format wave files as samples
via a USB connection.
When using the JUNO-G, you will notice that a variety of different
categories come into play when working with sounds. What follows
is a simple explanation of each sound category.
Tones
On the JUNO-G, the tones are the smallest unit of sound. However,
it is not possible to play a tone by itself. The patch is the unit of
sound which can be played, and the tones are the basic building
blocks which make up the patch.
fig.Tone.e
Tones consist of the following five components.
WG (Wave Generator)
Specifies the PCM waveform (wave) that is the basis of the sound,
and determines how the pitch of the sound will change.
The JUNO-G has 1267 different waveforms. All patches built into the
JUNO-G consist of combinations of tones which are created based on
these waveforms.
* There are four wave generators for each rhythm tone (percussion
instrument sounds).
TVF (Time Variant Filter)
Specifies how the frequency components of the sound will change.
TVA (Time Variant Amplifier)
Specifies the volume changes and the sound’s position in a stereo
soundfield.
Envelope
You use Envelope to initiate changes to occur to a sound over time.
There are separate envelopes for Pitch, TVF (filter), and TVA
(volume). For example if you wish to modify the way in which the
sound attacks or decays over time, you would adjust the TVA
envelope.
LFO (Low Frequency Oscillator)
Use the LFO to create cyclic changes (modulation) in a sound. The
JUNO-G has two LFOs. You can use the LFO to apply an effect to
either the WG (pitch), the TVF (filter), or the TVA (volume). When
an LFO is applied to the WG pitch, a vibrato effect is produced.
When an LFO is applied to the TVF cutoff frequency, a wah effect is
produced. When an LFO is applied to the TVA volume, a tremolo
How the JUNO-G Is Organized
Basic Structure
Sound Generator
Section
Recording
Playback
Song Recorder Section
Play
Resampling
Audio Input
Sample
Audio Track
Recording
MIDI Track
Audio Track
Sample Event
Controller Section (controllers such as keyboard, pitch bend lever, etc.)
Classification of JUNO-G Sound Types
WG
Pitch
Envelope
TVF
TVF
Envelope
TVA
Envelope
TVA
LFO 1 LFO 2
control signal
Tone
audio signal
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