これまでのおさらい

過去2回までは日本語の詩をテーマにpollyの発話者としての表現力の巾を検証しました。

宮沢賢治 雨ニモマケズ
谷川俊太郎　男の子のマーチ

今回は言語を英語に変えて検証します。
みんなに馴染みのある英語の詩が思い浮かばなったので、Appleの創始者、Steve Jobsの言葉をテーマにします。

Steve Jobsはスピーチやプレゼン、インタビューや自伝等、シンプルでありながら人の心を掴む数々の名言を残しています。

その中から私の心にグサリと刺さる言葉達をチョイスしました。

原文

・If today were the last day of my life, would I want to do what I am about to do today?
・Why join the navy if you can be a pirate?
・I’m a very big believer in equal opportunity as opposed to equal outcome.
・I’m convinced that the only thing that kept me going was that I loved what ・I did. You’ve got to find what you love. And that is as true for your work as it is for your lovers.
・My favorite things in life don’t cost any money. It’s really clear that the most precious resource we all have is time.
・You can’t connect the dots looking forward; you can only connect them looking backwards. So you have to trust that the dots will somehow connect in your future.
・Great things in business are never done by one person. They’re done by a team of people.
・Everyone here has the sense that right now is one of those moments when we are influencing the future.
・Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose.
・If you haven’t found it yet, keep looking. Don’t settle. As with all matters of the heart, you’ll know when you find it. And, like any great relationship, it just gets better and better as the years roll on.
・Being the richest man in the cemetery doesn’t matter to me… Going to bed at night saying we’ve done something wonderful… that’s what matters to me.
・I want to put a ding in the universe.
・Simple can be harder than complex. You have to work hard to get your thinking clean to make it simple. But it’s worth it in the end because once you get there, you can move mountains.
・Do you want to spend the rest of your life selling sugared water, or do you want a chance to change the world?
・We used to dream about this stuff. Now we get to build it. It’s pretty great.
・Stay hungry. Stay foolish.

原文入力結果 （音素チューニング無し）

日本語と違い、そのままでも聞けるクオリティです。チューニング要素は文間の間の取り方位です。

音素チューニング

素の変換結果のクオリティが十分高いので、チューニングは間を入れるだけです。

<speak>
<prosody rate="80%">
If today were the last day of my life, would I want to do what I am about to do today?<break time="4000ms"/> 
Why join the navy if you can be a pirate?<break time="4000ms"/> 
I’m a very big believer in equal opportunity as opposed to equal outcome.<break time="4000ms"/> 
I’m convinced that the only thing that kept me going was that I loved what I did. You’ve got to find what you love. And that is as true for your work as it is for your lovers.<break time="4000ms"/> 
My favorite things in life don’t cost any money. It’s really clear that the most precious resource we all have is time.<break time="4000ms"/> 
You can’t connect the dots looking forward; you can only connect them looking backwards. <break time="1500ms"/>So you have to trust that the dots will somehow connect in your future.<break time="4000ms"/> 
Great things in business are never done by one person. They’re done by a team of people.<break time="4000ms"/> 
Everyone here has the sense that right now is one of those moments when we are influencing the future.<break time="4000ms"/> 
Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose.<break time="4000ms"/> 
If you haven’t found it yet, keep looking. Don’t settle. As with all matters of the heart, you’ll know when you find it. And, like any great relationship, it just gets better and better as the years roll on.<break time="4000ms"/> 
Being the richest man in the cemetery doesn’t matter to me… Going to bed at night saying we’ve done something wonderful… that’s what matters to me.<break time="4000ms"/> 
I want to put a ding in the universe.<break time="4000ms"/> 
Simple can be harder than complex. You have to work hard to get your thinking clean to make it simple. But it’s worth it in the end because once you get there, you can move mountains.<break time="4000ms"/> 
Do you want to spend the rest of your life selling sugared water, or do you want a chance to change the world?<break time="4000ms"/> 
We used to dream about this stuff. Now we get to build it. It’s pretty great.<break time="4000ms"/> 
Stay hungry. <break time="1500ms"/> Stay foolish.<break time="3000ms"/> </prosody>
<break time="6000ms"/> 
</speak>

結果

十分なクオリティです。下手なナレーターを凌駕します。

Summary

英語はグローバルに使われているのでサービスの質も高く、日本語のTTSと比較して圧倒的なサービスクオリティの差になりました。

この差は表意文字の日本語と表音文字の英語という違いからきています。ここは書き出すと長くなるので、次回以降詳しく解説します。