General info

The Roland Alpha Juno series, released in the mid-1980s, is a line of analog synthesizers that builds on the legacy of the earlier Juno models while introducing new features and a more compact design. The series includes the **Alpha Juno-1**, **Alpha Juno-2** and the rack-mounted **MKS-50**. These synths are known for their warm sound, versatile features and affordability compared to other vintage Junos.

Key Features:

1. **Digitally Controlled Oscillators (DCOs)**:
- The Alpha Junos use DCOs for stable pitch control, offering 14 waveforms, including unique pulse-width modulation (PWM) sawtooth and comb saw waves.
- A sub-oscillator with multiple octave and shape settings enhances low-end capabilities.
2. **Filter and Modulation**:
- A traditional analog Voltage-Controlled Filter (VCF) with frequency, resonance, and envelope modulation.
- While the filter lacks self-oscillation (unlike earlier Junos), it supports velocity and aftertouch modulation for expressive performance.
3. **Advanced Envelope Generator**:
- A 5-stage Multi-Segment Envelope Generator (MSEG) replaces the simpler ADSR envelopes of earlier models, allowing more intricate sound shaping.
4. **Built-in Chorus**:
- A variable-rate chorus effect adds depth and richness to sounds, though it is less lush than the earlier Juno-60/106 chorus.
5. **Performance Features**:
- Velocity-sensitive keys (Juno-2) and aftertouch provide dynamic expression.
- Chord Memory allows storing and playing chords with a single key press.
- Portamento for smooth pitch transitions.
6. **Programming Interface**:
- The Alpha Dial replaces traditional sliders for parameter editing, which some users find less intuitive.
- External programmers like the **PG-300** or modern MIDI controllers (e.g., Stereoping) simplify programming.
7. **MIDI Implementation**:
- Improved MIDI support compared to earlier Junos, making it suitable for modern setups.
8. **Compact Design**:
- The Alpha Juno-1 features 49 keys, while the Alpha Juno-2 has 61 keys with velocity and aftertouch. Both are lightweight and portable.

## Sound Characteristics
The Alpha Junos retain the classic warm sound of analog Junos but with added versatility due to their more complex architecture. They excel at creating:
- Lush pads
- Basslines (especially acid-style)
- Glassy bells
- Plucked string-like sounds
- Rave/techno stabs using Chord Memory
While some users feel they lack the "magic" of earlier Junos due to toned-down filter resonance, others appreciate their darker, colder sound character.
## Notable Users
The Alpha Junos have been used by artists like **Massive Attack**, **The Prodigy**, **Faithless**, **Joey Beltram**, and **Human Resource**. Their iconic "Hoover" sound became a staple in early rave and hardcore music.
## Legacy
The Roland Alpha Juno series remains a favorite among synth enthusiasts for its affordability, reliability, and unique sound design capabilities. Despite its less intuitive programming interface, it offers deep synthesis potential that complements both vintage and modern setups.