Add audio support

README_AUDIO.MD

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+# Compose Media Player Audio
+
+[![Maven Central - Audio](https://img.shields.io/maven-central/v/io.github.kdroidfilter/composemediaplayer-audio.svg?label=audio)](https://search.maven.org/artifact/io.github.kdroidfilter/composemediaplayer-audio)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![Kotlin](https://img.shields.io/badge/kotlin-multiplatform-blue.svg?logo=kotlin)](https://kotlinlang.org/docs/multiplatform.html)
+[![Platforms](https://img.shields.io/badge/platforms-Android%20|%20iOS%20|%20macOS%20JVM%20|%20Windows%20JVM%20|%20Linux%20JVM%20|%20Web-lightgrey.svg)](https://github.com/kdroidfilter/ComposeMediaPlayer)
+
+Compose Media Player audio module is a lightweight audio-only player for Compose Multiplatform. It supports Android, iOS, JVM Desktop (macOS/Windows/Linux), and Web (Wasm).
+
+For the video module, see [README_VIDEO.MD](README_VIDEO.MD).
+
+## Table of Contents
+- [Features](#features)
+- [Installation](#installation)
+- [Usage](#usage)
+- [State and Controls](#state-and-controls)
+- [Error Handling](#error-handling)
+- [Platform Notes](#platform-notes)
+- [Audio Format Support](#audio-format-support)
+- [Sample](#sample)
+
+## Features
+
+- **Multiplatform Support**: Works on Android, iOS, JVM Desktop, and Web (Wasm).
+- **Local and Remote Playback**: Play files from disk or stream from HTTP(S) URLs.
+- **Simple Controls**: Play, pause, stop, seek, and volume.
+- **Live State Helper**: `rememberAudioPlayerLiveState()` exposes state, position, duration, and volume.
+- **Error Callbacks**: Hook into playback errors via `setOnErrorListener`.
+
+## Installation
+
+Add the audio module dependency in your `build.gradle.kts`:
+
+```kotlin
+dependencies {
+    implementation("io.github.kdroidfilter:composemediaplayer-audio:<version>")
+}
+```
+
+## Usage
+
+```kotlin
+@Composable
+fun AudioSample() {
+    val audioState = rememberAudioPlayerLiveState()
+    val url = "https://example.com/stream.mp3"
+
+    Row {
+        Button(onClick = { audioState.player.play(url) }) { Text("Play") }
+        Button(onClick = { audioState.player.pause() }) { Text("Pause") }
+        Button(onClick = { audioState.player.stop() }) { Text("Stop") }
+    }
+}
+```
+
+For local files, pass a file path or file URI:
+
+```kotlin
+val player = AudioPlayer()
+player.play("/path/to/file.mp3")
+// or: player.play("file:///path/to/file.mp3")
+```
+
+If you are using FileKit, you can pass `PlatformFile.getUri()`:
+
+```kotlin
+val file = FileKit.openFilePicker(type = FileKitType.File("mp3", "wav"))
+file?.let { audioState.player.play(it.getUri()) }
+```
+
+## State and Controls
+
+- `currentPosition()` and `currentDuration()` return milliseconds. Duration may be null for live streams.
+- `currentPlayerState()` returns `AudioPlayerState.PLAYING`, `PAUSED`, `BUFFERING`, or `IDLE`.
+- `seekTo(timeMs)` works only when the source is seekable.
+- `setVolume(volume)` expects a value between 0.0 and 1.0.
+- `setRate(rate)` is supported on Android/iOS/Web; on JVM it is currently a no-op.
+
+## Error Handling
+
+```kotlin
+audioState.player.setOnErrorListener(object : ErrorListener {
+    override fun onError(message: String?) {
+        println("Audio error: ${message ?: "Unknown error"}")
+    }
+})
+```
+
+## Platform Notes
+
+- Android uses Media3, iOS uses AVFoundation, Web uses HTML5 Audio, JVM uses Rodio.
+- Seeking and duration availability depend on the source (stream vs file).
+
+## Audio Format Support
+
+Audio format support depends on OS/browser decoders. The tables below show typical baseline support per backend.
+Legend: Yes supported, No not supported, Partial device/browser-dependent.
+
+### JVM (Rodio)
+
+| Format | Local | HTTP | HLS | Seeking |
+|--------|-------|------|-----|---------|
+| MP3    | Yes   | Yes  | Yes | Yes     |
+| AAC    | Yes   | Yes  | Yes | Yes     |
+| FLAC   | Yes   | Yes  | No  | Yes     |
+| OGG    | Yes   | Yes  | No  | Yes     |
+| WAV    | Yes   | Yes  | No  | Yes     |
+
+### Android (Media3)
+
+| Format | Local | HTTP | HLS | Seeking |
+|--------|-------|------|-----|---------|
+| MP3    | Yes   | Yes  | Yes | Yes     |
+| AAC    | Yes   | Yes  | Yes | Yes     |
+| FLAC   | Yes   | Yes  | No  | Yes     |
+| OGG    | Yes   | Yes  | No  | Yes     |
+| WAV    | Yes   | Yes  | No  | Yes     |
+
+### iOS (AVFoundation)
+
+| Format | Local | HTTP | HLS | Seeking |
+|--------|-------|------|-----|---------|
+| MP3    | Yes   | Yes  | Partial | Yes |
+| AAC    | Yes   | Yes  | Yes | Yes     |
+| FLAC   | Partial | Partial | No | Partial |
+| OGG    | No    | No   | No  | No      |
+| WAV    | Yes   | Yes  | No  | Yes     |
+
+### Web (HTML5 Audio)
+
+| Format | Local | HTTP | HLS | Seeking |
+|--------|-------|------|-----|---------|
+| MP3    | Yes   | Yes  | Partial | Yes |
+| AAC    | Yes   | Yes  | Partial | Yes |
+| FLAC   | Partial | Partial | No | Partial |
+| OGG    | Partial | Partial | No | Partial |
+| WAV    | Yes   | Yes  | No  | Yes     |
+
+Notes:
+- Web "Local" assumes a `blob:` or `file:` URL from a file picker; browser security rules apply.
+- Web HLS is supported only in Safari unless you provide a custom HLS loader.
+- iOS FLAC support varies by OS version and device.
+
+## Sample
+
+See `sample/composeApp/src/commonMain/kotlin/sample/app/AudioPlayerScreen.kt` for a complete example.