小程序功能特点

1. 文本转语音
2. 多平台多发音人可选
3. 可调语速
4. 可提供音频下载
5. 良心产品无广告?

小程序码

已对接在线语音识别服务

1. 思必驰dui平台 (超过40个免费可选发音人)
2. 讯飞开放平台 (5个免费可选发音人)
3. 百度语音(4个免费发音人可选)

小程序截图

服务端主要代码

class TTSController extends Controller {async tts () {let params = this.ctx.querylet result = null// 根据plat参数来调用不同的接口if (params.plat === 'xf') {result = await this.ctx.service.xftts.getTts(params)} else if (params.plat === 'baidu') {result = await this.ctx.service.baidutts.getTts(params)} else {result = await this.ctx.service.aispeechtts.getTts(params)}// 设置response的类型，这样客户端接收到的就是一个文件流this.ctx.response.type = 'audio/mpeg'this.ctx.body = result}
}

小程序客户端template代码（使用的mpvue）

<template><div class="container"><div class="preview"><textarea :class="textAreaFocus? 'focus' : ''" auto-height @focus="bindTextAreaFocus" @blur="bindTextAreaBlur" placeholder="请输入文本" v-model="text"  maxlength="256"/></div><div class="setting"><picker @change="bindPlatChange" v-model="platIndex" range-key="name" :range="platArr"><div class="item"><div class="label">选择平台</div><div class="value voice">{{platArr[platIndex].name}}</div></div></picker><picker @change="bindPickerChange" v-model="index" range-key="name" :range="array"><div class="item"><div class="label">选择发音人</div><div class="value voice">{{array[index].name}}</div></div></picker><div class="item speed"><div class="label">调节语速</div><div class="value"><slider @change="onSpeedChange" :value="speedObj.default" :step='speedObj.step' activeColor="#6F8FFF" :min="speedObj.min" :max="speedObj.max" show-value /></div></div></div><div style="height: 140rpx;"><div class="btn-group"><div class="item"><button @click="audioPlay" type="main">播放合成语音</button> </div><div class="item"> <button @click="audioDownload" type="submain">复制链接下载</button> </div></div></div><div class="desc">说明：tts是英文 text to speech的缩写，即文本转语音技术<contact-button type="default-light"session-from="weapp">联系客服</contact-button></div></div>
</template>

script 代码

<script>
import voiceIdArray from './voiceIdArray'export default {data () {return {array: voiceIdArray.aispeech,platArr: [{id: 'xf', name: '科大讯飞'}, {id: 'aispeech', name: '思必驰'}, {id: 'baidu', name: '百度'}],platIndex: 1,index: 26,text: `改革春风吹满地，吹满地，春风吹满地。\n中国人民真争气，真争气，人民真争气。\n这个世界太疯狂，耗子都给猫当伴娘。\n齐德隆，齐东强。\n齐德隆的咚得隆咚锵。`,voiceId: 'lili1f_diantai',speed: 1,textAreaFocus: false,audioCtx: null,ttsServer: 'https://tts.server.com',audioSrc: '',downloadUrl: '',xfSpeedObj: {min: 0,max: 100,default: 50,step: 1},aispeechSpeedObj: {min: 0.7,max: 2,default: 1,step: 0.1},baiduSpeedObj: {min: 0,max: 9,default: 5,step: 1},speedObj: {}}},watch: {platIndex (newVal, oldVal) {if (newVal === 2) {this.array = voiceIdArray.baiduthis.index = 0this.speedObj = this.baiduSpeedObj}if (newVal === 1) {this.array = voiceIdArray.aispeechthis.index = 26this.speedObj = this.aispeechSpeedObj}if (newVal === 0) {this.array = voiceIdArray.xfthis.index = 0this.speedObj = this.xfSpeedObj}}},onShareAppMessage () {return {title: '文本转语音服务，多发音人可选'}},methods: {onSpeedChange (e) {this.speedObj.default = e.target.value},bindPlatChange (e) {this.platIndex = e.target.value * 1},bindPickerChange (e) {this.index = e.target.value},getAudioSrc () {if (this.text === '') {return false}const speed = this.speedObj.defaultconst voiceId = this.array[this.index].idconst plat = this.platArr[this.platIndex].idreturn encodeURI(`${this.ttsServer}/tts?plat=${plat}&voiceId=${voiceId}&speed=${speed}&text=${this.text}`)},getDownloadUrl () {const plat = this.platArr[this.platIndex].idconst voiceId = this.array[this.index].idwx.showLoading({title: '加载中'})wx.request({url: 'https://tts.server.com/getdownloadurl',data: {plat: plat,voiceId: voiceId,speed: this.speedObj.default,text: this.text},header: {'content-type': 'application/json' // 默认值},success (res) {wx.hideLoading()wx.setClipboardData({data: res.data.short_url,success (res) {wx.showToast({title: '链接已复制请用浏览器下载(ios端无法下载)',icon: 'none',duration: 3000})}})}})},audioPlay () {this.audioCtx.src = this.getAudioSrc()if (!this.audioCtx.src) {wx.showToast({title: '请先输入文本',icon: 'none',duration: 2000})return false}wx.showLoading({title: '加载中'})this.audioCtx.play()},audioDownload () {this.getDownloadUrl()},bindTextAreaBlur (e) {this.textAreaFocus = falsethis.text = e.target.value},bindTextAreaFocus () {this.textAreaFocus = true}},created () {this.speedObj = this.aispeechSpeedObj},mounted () {this.audioCtx = wx.createInnerAudioContext()this.audioCtx.onEnded((res) => {wx.hideLoading()})this.audioCtx.onPlay((res) => {wx.hideLoading()})wx.showShareMenu({withShareTicket: true})}
}
</script>

接口对接过程中，百度的是最方便的因为有sdk可以直接使用，讯飞的最麻烦需要自己做参数加密，思必驰dui的虽然没提供SDK但是文档写的比较详细对接过程也很方便快速。

目前无法解决的就是，小程序内无法直接下载的问题，只能提供链接，然后用户自己打开浏览器进行下载（iPhone似乎无解）。