# MusicOS V0.1 — Product Specification

## Objective

Create a fast, free, open-source composition workspace that lets a user start with a short musical idea and extend it indefinitely without rebuilding the arrangement.

## Core concepts

### Composition
- title
- duration
- tempo
- time signature
- key / scale
- tracks
- sections

### Section
- name
- start
- duration
- repeat count
- optional variation flag

### Track
- instrument name
- mute
- solo
- volume
- pan
- MIDI note events

## Primary workflow

1. Create a composition with a default duration of 60 seconds.
2. Add instruments.
3. Create/edit musical material.
4. Split the timeline into named sections.
5. Repeat or duplicate a section.
6. Extend total duration.
7. Change instrumentation without changing the musical notes.
8. Export through the selected audio/MIDI engine.

## Instrument starter set

Piano, Violin, Cello, Flute, Guitar, Bass, Veena, Mridangam, Tabla, Drums, Strings, Brass, Choir, Synth.

## Duration behavior

Presets:
- 1 minute
- 2 minutes
- 3 minutes
- 5 minutes
- 10 minutes

Also support custom duration.

## Future CinemaMusicOS extensions

- Sa Ri Ga Ma notation
- tala
- raga / scale
- chord assistant
- melody generator
- variation generator
- cinematic orchestration
- stem generation
- AI arrangement
- project-to-video synchronization

## Licensing principle

Use open-source software and separately verify the license of every bundled sound/sample library before commercial distribution.