Roland Juno-106
What It Is
The Juno-106 is an analog synthesizer released by Roland in 1984. It
is 6 voice polyphonic and MIDI compatible. It has an onboard memory capable
of storing 128 patches, and it has plenty of sliders, knobs and buttons
for manipulation of various aspects of the sound. The Juno is a great synth
that combines some modern features like MIDI with a great "classic"
analog sound.
How It Works
The Juno has four independent waveform generators (pulse, sawtooth,
square wave sub-oscillator, and noise). The pitch can be modulated with
the bender and with the Low Frequency Oscillator (LFO) to
give a vibrato effect. The output is then sent through:
- A High Pass Filter (HPF) which either boosts or cuts the bass.
- A Voltage Controlled Filter (VCF). This is a resonant low pass
filter which cuts high frequency components of the sound. The cutoff level
can be controlled by the combination of an adjustable slider, the Envelope
Generator (ENV), the Low Frequency Oscillator (LFO), and optionally
the bender. There is also a slider which adjusts the resonance level.
- A Voltage Controlled Amplifier (VCA) which adjusts the volume
level of the sound. The VCA can be controlled by the Envelope Generator
(ENV).
- A Chorus function which can perform stereo phasing effects on the signal
to give a "fuller" sound.
Other features include:
- Portamento, which allows the synthesizer to "slide" between
notes.
- A "unison" mode which assigns all six oscillators to the
same note, essentially turning the Juno into a big fat monophonic synth.
(Great for big fat unpredictable basslines...buckets o' fun when used with
portamento.)
- Many functions can be controlled externally through MIDI system exclusive
messages.
- High-tech storage and retrieval of patches to audio cassettes.
The Juno uses Digitally Controlled Oscillators (DCOs) to produce
sound rather than the older style Voltage Controlled Oscillators
(VCOs) found on many vintage synthesizers. The advantage of a DCO is that
it is more stable and less susceptible to the tuning problems, especially
due to temperature changes, that can be a problem with many analog synths.