play sound when flip card in flutter

I want to play sound when the cart flipping to show mean of word to the user I tried with Inkwell but it doesn’t work.
I want to implement a dictionary that when the user clicks on any word can see mean and listen voice.
Also, I have placed a button at the bottom of the page to test the sound, when we click on it, the sound will play, but it does not work for the program.

my code repo: https://github.com/efarhadi/sw_flash
my test_filip.dart file:

import 'package:audioplayers/audioplayers.dart';
import 'package:flip_card/flip_card.dart';
import 'package:flutter/material.dart';
import 'dart:convert';

import 'package:flutter/services.dart';

class TestFlip extends StatefulWidget {
  const TestFlip({Key? key}) : super(key: key);

  @override
  _TestFlipState createState() => _TestFlipState();
}

class _TestFlipState extends State<TestFlip> {
  final player = AudioPlayer();
  List _items = [];
  Future<void> readJson() async {
    final String response = await rootBundle.loadString('assets/words.json');
    final data = await json.decode(response);
    setState(() {
      _items = data["items"];
    });
  }

  @override
  void initState() {
    // TODO: implement initState

    readJson();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          children: [
            Expanded(
              child: ListView.builder(
                itemCount: _items.length,
                itemBuilder: (BuildContext context, int index) {
                  return InkWell(
                    onTap: () {
                      playSound('a070.mp3');
                    },
                    child: _HomeScreenCard(_items[index]["name"],
                        _items[index]["description"], context),
                  );
                },
              ),
            ),
            ElevatedButton(
                onPressed: () {
                  playSound('a070.mp3');
                },
                child: Text('sala'))
          ],
        ),
      ),
    );
  }

  Widget _HomeScreenCardFront(String text, context) {
    return Container(
      height: 100,
      alignment: Alignment.center,
      margin: const EdgeInsets.symmetric(vertical: 10, horizontal: 20),
      decoration: BoxDecoration(
        color: Theme.of(context).primaryColor,
        borderRadius: BorderRadius.circular(10),
      ),
      // width: 200,
      child: Text(text),
    );
  }

  Widget _HomeScreenCardBack(String text, context) {
    return Container(
      height: 100,
      alignment: Alignment.center,
      margin: const EdgeInsets.all(10),
      decoration: BoxDecoration(
        // color: Theme.of(context).primaryColor,
        borderRadius: BorderRadius.circular(10),
      ),
      // width: 200,
      child: Text(text),
    );
  }

  Widget _HomeScreenCard(String textFront, String textBack, context) {
    return FlipCard(
      fill: Fill.fillBack,
      direction: FlipDirection.HORIZONTAL, // default

      front: _HomeScreenCardFront(textFront, context),
      back: _HomeScreenCardBack(textBack, context),
    );
  }

  playSound(String sound) async {
    await player.play(AssetSource(sound));
  }
}