HarmonyOS鸿蒙Next中音频mp3文件需要放在工程中哪个目录下才可以正常播放？

音频播放可以参考此链接：

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/audio-playback-overview-V5

音频管理：

https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-audio-V5#导入模块

提供个内置音频资源要播放Demo:

import audio from '@ohos.multimedia.audio';
import media from '@ohos.multimedia.media';
import fs from '@ohos.file.fs'
import picker from '@ohos.file.picker';

import { BusinessError } from '@ohos.base';
let urii: string = '';
let soundPool: media.SoundPool;
let streamId: number = 0;
const audioSelectOptions = new picker.AudioSelectOptions();
let soundId: number = 0;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
let PlayParameters: media.PlayParameters = {
  loop: 3, // 循环4次
  rate: audio.AudioRendererRate.RENDER_RATE_NORMAL, // 正常倍速
  leftVolume: 0.9, // range = 0.0-1.0
  rightVolume: 0.9, // range = 0.0-1.0
  priority: 3, // 最低优先级
}
let uri: string = "";

@Entry
@Component
struct NormalCapturer {
  @State message: string = '播放音频';

  async aboutToAppear(): Promise<void> {
    create();
  }

  async aboutToDisappear() {
   release();
  }

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)

        Button('播放音频').onClick(event => {
          PlaySoundPool();
        })
      }
      .width('100%')
    }
    .height('100%')
  }
}

async function create() {
  //创建soundPool实例
  soundPool = await media.createSoundPool(5, audioRendererInfo);
  //注册监听
  loadCallback();
  finishPlayCallback();
  setErrorCallback();
  // 加载音频资源

  const audioViewPicker = new picker.AudioViewPicker();
  audioViewPicker.select(audioSelectOptions).then(async (audioSelectResult: Array<string>) => {
    urii = audioSelectResult[0];
    console.info('audioViewPicker.select to file succeed and uri is:' + urii);
    if(urii){
      await fs.open(urii, fs.OpenMode.READ_ONLY).then(file_ => {
        let file=file_;
        console.info("file fd: " + file.fd);
        uri = 'fd://' + (file.fd).toString()
      }); // '/test_01.mp3' 作为样例，使用时需要传入文件对应路径。
      soundPool.load(uri).then(soundIdd => {
        console.info('soundPool load uri success');
        soundId=soundIdd;
      }).catch(err => {
        console.error('soundPool load failed and catch error is ' + err.message);
      })
    }

  }).catch(err => {
    console.error(`Invoke audioViewPicker.select failed, code is ${err.code}, message is ${err.message}`);
  })
}

async function loadCallback() {
  // 加载完成回调
  soundPool.on('loadComplete', soundId_ => {
    console.info('loadComplete, soundId: ' + soundId_);
  })
}

//设置播放完成监听
async function finishPlayCallback() {
  // 播放完成回调
  soundPool.on('playFinished', () => {
    console.info("recive play finished message");
    // 可进行下次播放
  })
}

//设置错误类型监听
function setErrorCallback() {
  soundPool.on('error', error => {
    console.info('error happened,message is :' + error.message);
  })
}

async function PlaySoundPool() {
  console.log("开始播放");
  // 开始播放,这边play也可带播放播放的参数PlayParameters
  streamId = await soundPool.play(soundId,PlayParameters);
}

async function release() {
  // 终止指定流的播放
  soundPool.stop(streamId);
  // 卸载音频资源
  await soundPool.unload(soundId);
  //关闭监听
  setOffCallback();
  // 释放SoundPool
  await soundPool.release();
}

//关闭监听
function setOffCallback() {
  soundPool.off('loadComplete');
  soundPool.off('playFinished');
  soundPool.off('error');
}

注：fs.open获取的文件只能是沙箱目录下的文件，音频文件可以放到resources/rawfile目录下，通过resourceManager资源管理器getRawFd方法获取文件描述符fd，文档地址：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-resource-manager-V5#getrawfd9