The French Semi-Consonants

What is a Semi-Consonant?

When you speak (or in our case sing) in French, there are 36 sounds to master:

  • 15 vowel-sounds
  • 18 consonant-sounds
  • 3 semi-consonant sounds (also sometimes called semi-vowels or glides)

In today’s post, we will focus on the semi-consonant-sound.

The Semi-Consonants

Semi-consonant [ɥ] 

Model word: nuit [nɥi] (night)

The corresponding sound for the [ɥ] is the phonetic [y] as in the word “lyne” in French

The Yod [j]

Model word: Dieu [djø] (God)

The corresponding sound for the [j] is the phonetic [i] as in the word “midi”. We often refer to this one specifically as a Yod. Think of saying the word “you” in English, that first glide is our [j].

Semi-consonant [w] 

Model word soir [swar] (evening)

The corresponding sound for the [w] is the phonetic [u] as in the word “tout”. Think of saying the word “we” in English, the first glide is our [w].

All of the French semi-consonants have these three things in common:

1. They are always before the vowel-sound of the syllable.

In French syllabification, each syllable can only have one vowel-sound per syllable, some vowel combinations make a vowel sound


  • aimer (to love) has two syllables ai/mer. The first “ai” makes one vowel sound and the last “er” make one vowel sound and they are seperated by the “m”
  • In the word “nuit” (night), there are two vowel sound and no consonant seperating them, also, there is not combination of “ui” which makes one vowel-sound, so there is no syllabification. The semi-consonant is created: [nɥi]

2.  They are introductory closures that open into or glide into the more open vowel sound, which in turn occupies the duration of the note-value.

You should never sing or elongate the semi-consonant, the glide should be made swiftly as you always aim for the vowel following the glide. If we look at the IPA for “nuit” [nɥi] the most important vowel to sing is the [i] which comes after the glide.

3.  They never, in themselves, constitute a syllable.  When they become vowel-sounds (and/or when they are assigned a note) they lose their qualities as semi-consonants, each being transformed into a particular vowel-sound.

Because we never elongate the semi-consonant, it cannot be a vowel-sound UNLESS they are assigned a note in the text:

In the example above, the first “curieux” has two notes, and clearly, you would have to use the glide to get to the [ø]. In the second example, the [j] loses its glide quality and becomes a vowel thanks to the composer who gave it a note value.

Be careful not to add a glide when it is not supposed to be there!

In the spoken French language, when a word ends in a vowel + mute “e” (a.k.a schwa), we do not pronounce the schwa.

For example “joie” (joy) is spoken without the last “e” [ʒwa], but many French composers gave a note value to the schwa, so that when you sing the word “joie” you would have to sing this otherwise mute “e” [ʒwaə].

Setting the mute “e” as accurately and elegantly as possible was always a goal for the French composers:

  • Setting the mute “e” on the weaker beat
  • Setting the mute “e'” on a lower pitch
  • Giving the mute “e” a shorter note value than the preceding syllable
  • Sometimes suggesting that we drop the mute “e” by setting it on a note tied to the preceding syllable.
  • The music determines whether or not we sing the mute “e”

So when you sing the aria “Que fais-tu, blanche tourterelle” from Roméo et Juliette by Gounod, you will see the following:

Looking at these two excerpts from the aria, you notice a note value given to the schwas in the words “proie” and “joie”. The danger here is the temptation to insert a [j] between teh [wa] and the [ə].

The correct way to sing this is as follows:

Laisse-là ces oiseaux de proie, Tourterelle qui fais ta joie

[lɛsəˈla sɛz‿waˈzo də ˈproiə turtəˈrɛlə ki fɛ ta ˈʒwaə]

And not

[lɛsəˈla sɛz‿waˈzo də ˈprwajə turtəˈrɛlə ki fɛ ta ˈʒwajə]

Believe it or not, I hear the addition of a Yod quite often, and sometimes from established singers. It is probably not because they mean to do it; gliding cleanly between these vowels takes a lot of practice. Not to mention that if you glide between the vowel and the schwa, you will create a stress on the mute “e” which is not allowed…You have all seen the meme:

Be like the schwa…never stressed

Adding a glide between these vowels, creates confusion because it does not sound like the right word, and it is a dead give-away that you are not French. The transition between these vowels must be seemless. Happy gliding!

How to Sing the French Mixed Vowels

The French language has fifteen vowel-sounds. I say this every year at the start of my French Lyric Diction class as the students’ eyes widen. I can almost hear them thinking “Fifteen? How is that possible? How can I sing fifteen different vowel sounds?” That seems like a lot and it can be quite daunting if you are a singer starting out singing in this language. The three vowel-sounds that I would like to focus on in this little French Lyric Diction post, are the three mixed vowel-sounds [œ] [ø] and [y].

When I say “vowel-sound” I don’t mean a pure vowel. The vowels we all know from when we first learn how to read are a, e, i, o, and u. Think of all the french vowel-sounds as derivatives of these. Some vowel sounds are even based on the derivatives of the derivatives. A mixed vowel is when you take two characteristics of two different vowels and as you combine them you create a whole new vowel. They are called “mixed” because their formation is dependent on the simultaneous positioning of the tongue and the lips.

In the chart above, we see the vowels in the tongue position, and the vowels in the lip position, in the middle are the mixed vowels.

The Phonetic [y] vowel-sound:

  • Phonate the [i] sound, as in the French word “midi” [miˈdi] (noon) or if you wish to come from the English language the [i] in the word “we”.
  • Now, sustain this [i] sound, as you do so, form your lips to the shape of a closed [o] as in the word “rose” [rozə] in French (or English) all the while not changing your [i] tongue position.
  • You now magically have the phonetic [y] vowel as in the French word “lune” [lynə] (moon).

The o-slash vowel:

  • Phonate an open [ɛ] as in the French word “tête” [tɛtə] (head) or from the English language, the word “feather”
  • Again, sustain this [ɛ] and as you do so, form your lips to the shape of a closed [o] while not changing your tongue position.
  • You now are making the sound of [ø] as in the word “feu” [fø] (fire).

The o-e vowel is a little different:

  • Start out in the same way you did with the o-slash: phonate on an open [ɛ].
  • While sustaining this vowel, you will form your lips into an open [ɔ] as in the French word “homme” [ɔmə] (man) or from the English you can think of the word “on”. So this is less of a closed [o] formation than we used above. (If it starts sounding like [ø], turn back you have gone to far towards a closed vowel with your lips!)
  • You now have a perfect o-e vowel, and you can now perfectly sing the word “coeur” [kœr] (heart)
  • Nota bene: the Schwa [ə] sound is equivalent to the [œ]. They have the same sound, the difference is that the schwa can never be stressed while the [œ] can be stressed. Example: émeute [eˈmøtə] (riot) while singing this word, the stress is on the o-slash and you would sing the schwa unstressed if it has a note value.

As you sing, if you think about the vowel that you are making with your tongue and just adjust your lips, you can avoid going too far between sounds, and your singing and legato will feel easier, especially depending on the tessitura in which you are singing.


Intonate these words, all the while keeping your tongue in the [i] position while forming your lips into a closed [o] when reading words with [i] or [y] sounds.

Tu dis qu’il a une fille unique. (You say that he has an only daughter.)

[ty di kil a ynə fij ynikə]

Looking at the phonetic transcription, you have only 2 vowels ([a] and [i]) and two vowel-sounds ([y] and [ə]). The [y] and [i] are the ones you want to practice here. Glide to and from these vowels, see how it feels to not change the tongue position. Try it on different pitches to practice. Do the same with the other mixed-vowels until you master singing them, it will feel easier and your voice will most definitely respond!

Singing in French can be a very scary thing. I am not going to lie to you and tell you that it is easy. But with a few tools, it can definitely be more singer-friendly and as you practice, you will really learn to enjoy singing in this beautiful language.