Why use が in the sentence below? Would を be equally correct?

> このピアノはとてもいい音 **が** します。
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2016-05-04T21:16:01.153
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2016-05-05T03:25:01.720
2016-05-05T03:25:01.720
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question
particle-が
Why use が in the sentence below?
The structure of Japanese in SOV, on the other hand English's is SVO.

If here you take the particle を，piano would become the object, and

> はとてもいい音がします。

mening, in English "has very good tunes".

So if you put the を instead Object comes first, that would sound strange,
instead the particle は needs to come to make the Subject.

Thanks.
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2016-05-05T01:19:11.867
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2016-05-05T01:19:11.867
33937
answer