uragoe wo tukatte.

It is read:

うらごえ を つかって

Without the teaching spaces, it would normally be written as:

裏声を使って

A natural pitch-accent explanation is not necessary at a basic level, but the key thing is to recognize:

• 裏声（うらごえ） = falsetto / head voice
• 使って（つかって） = te-form of 使う（つかう）, to use

裏声 literally breaks down as:

• 裏（うら） = back, reverse, hidden side
• 声（こえ） = voice

So literally it is something like back voice or reverse voice, but in actual usage it means falsetto or head voice.

It is a fixed word, so you should learn 裏声 as one vocabulary item rather than trying to interpret it word-by-word every time.

を marks the direct object of the verb.

In this sentence:

• 裏声 = the thing being used
• 使って = use / using

So 裏声を使って means use your falsetto or using falsetto.

This is the normal pattern:

• Noun + を + 使う
• something + を + use

Examples:

• ペンを使う = use a pen
• 日本語を使う = use Japanese
• 裏声を使う = use falsetto

使って is the te-form of 使う.

The dictionary form is:

• 使う = to use

Its te-form is:

• 使って

For -う verbs like 使う, the ending changes like this:

• 使う → 使って
• 歌う → 歌って
• 買う → 買って

The te-form has several uses, and here the main possibilities are:

1. A casual instruction/command

   • 裏声を使って。 = Use your falsetto.

2. A connection to an omitted second action

   • 裏声を使って歌って。 = Sing using falsetto.
     Sometimes the second verb is left unstated because it is obvious from context.

Yes, it can be a complete utterance in conversation, but it may feel a little open-ended because it ends in the te-form.

Japanese te-form endings often do one of two things:

• connect to another verb
• function as a soft/casual command

So 裏声を使って。 could mean:

• Use your falsetto.
• Try doing it in falsetto.
• Use falsetto and... (with the rest understood from context)

In spoken Japanese, leaving things implied is very common.

It is a casual instruction, but not as hard or blunt as a plain imperative like 使え.

Roughly speaking:

• 使って。 = Use it. / Please use it.
  Casual, common, often soft depending on tone.
• 使ってください。 = more polite
• 使え。 = strong direct command, often rough

So 裏声を使って。 is not automatically rude, but it is casual. It would be natural when speaking:

• to a friend
• in a rehearsal setting
• from a coach/teacher in an informal tone
• in notes or instructions

If you want to make it clearly polite, say:

• 裏声を使ってください。

Yes, and the nuance changes a little.

• 裏声を使って = use falsetto
• 裏声で = in falsetto / with a falsetto voice

Both can be natural, but they focus differently.

Compare:

• 裏声を使って歌って。
  Sing using falsetto.
  Focus: intentionally employing falsetto as a technique.

• 裏声で歌って。
  Sing in falsetto.
  Focus: the manner/style/voice used while singing.

So を使って sounds a bit more like use this technique, while で sounds more like do it in that voice.

Japanese often omits subjects and other information when they are clear from context.

So 裏声を使って。 usually means something like:

• Use your falsetto.
• Try using falsetto.

The subject is not stated, but in many real situations it is understood to be:

• you if someone is giving an instruction
• sometimes we or let’s depending on context
• occasionally another person already being discussed

This omission is very normal in Japanese.

Those spaces are usually just for learners.

Normal Japanese writing would be:

裏声を使って。

Japanese does not normally put spaces between words the way English does. Teaching materials sometimes add spaces to make the sentence easier to read and analyze.

They are very close, but not always identical in nuance.

• 裏声（うらごえ） is the native Japanese term and is very common.
• ファルセット is the loanword falsetto.

In many situations they are used similarly, especially in music contexts. But 裏声 can feel like the more everyday Japanese word, while ファルセット may sound a bit more technical, musical, or stylistically borrowed from Western vocal terminology.

For a learner, it is safe to understand 裏声 here as falsetto.

It would be natural in situations like:

• a singing lesson
• choir practice
• voice training
• karaoke coaching
• acting or comedy where someone wants a higher voice

For example, a teacher might say:

• そこ、裏声を使って。
  There, use falsetto on that part.

Or:

• もっと裏声を使って。
  Use more falsetto.

So the sentence sounds like a practical spoken instruction rather than a formal written statement.