ARCO - Virtual Instrument Playground

ARCO (ARchitectural COmposer) is a CLI application with a TUI interface for creating virtual/MIDI instruments. It provides a complete virtual instrument playground with real-time parameter control, built-in sequencer, and comprehensive sound shaping capabilities.

📦 Installation Options

🎯 RHEL/CentOS/Rocky/Alma/Fedora

🚀 RPM Install

# Add repository

sudo dnf config-manager --add-repo https://repos.musicsian.com/musicsian.repo

# Install package

sudo dnf install arco

# Launch ARCO with default settings

arco

# Or set initial frequency and BPM

arco --frequency 220 --bpm 140

📂 Browse Files ⬇️ Download .repo 📦 Direct RPM

🏛️ Arch Linux

🏛️ AUR Package Available

# Install using yay

yay -S arco

# Or using paru

paru -S arco

# Launch ARCO with default settings

arco

# Or set initial frequency and BPM

arco --frequency 220 --bpm 140

🏛️ View AUR Page 📄 View PKGBUILD

🎵 Key Features

🎹 Real-time Virtual Instrument

Multiple oscillator types (Sine, Square, Saw, Triangle)
Piano keyboard layout (QWERTY keys A-K)
Real-time parameter control
Low-latency audio processing

🎵 Built-in Sequencer

5 pre-built melodies in major and minor keys
Tempo control (60-200 BPM)
Auto-looping and transport controls
Play/Pause/Stop functionality

🔧 Sound Shaping

Filters: Low-pass, High-pass, Band-pass
ADSR envelopes with full control
Built-in reverb effects
13 real-time parameters

💾 Preset System

5 built-in presets (Default, Warm Pad, Bright Lead, Bass, Ethereal)
Save/load custom presets (Press 'R')
Automatic storage in ~/.config/arco/

🎮 Controls

Navigation:
  TAB/SHIFT-TAB    Navigate between controls
  ↑/↓ or +/-       Adjust parameter values
  ENTER            Switch between panels

Piano Keys:
  | W| |E| |  | T| |Y| |U|
  |C#|D#|  | F#|G#|A#| |
  | | | |  | | | | | | |
  |A|S|D|F|G|H|J|K|
  |C|D|E|F|G|A|B|C|

Sequencer:
  SPACE or P       Play/Pause sequencer
  X                Stop playbook

Presets & Help:
  R                Save current settings as preset
  ?                Show/hide help
  ESC              Close help modal
  Q                Quit ARCO

🎼 Available Melodies

C Major Scale      - Classic ascending scale (120 BPM)
A Minor Arpeggio   - Smooth chord progression (100 BPM)
G Major Melody     - Upbeat happy tune (140 BPM)
D Minor Mood       - Contemplative piece (90 BPM)
E Major Bright     - Fast energetic melody (150 BPM)

⚙️ System Requirements

Architecture: x86_64
OS: Linux (AlmaLinux 9+, RHEL 9+, Rocky Linux 9+, Fedora)
Audio: ALSA-compatible sound system
Memory: 50MB RAM minimum
Storage: 10MB disk space

🛠️ Development