How to Transpose a Song for Clarinet

Part of our guide to transposing a song to any key.

If you hand a clarinetist a piece of music written in concert pitch, it will sound a whole step too low. The standard soprano clarinet is a transposing instrument, and getting a part that reads correctly means understanding what it reads in and then moving the music to match. The pitch math is simple once you know the interval, but a good clarinet part is more than a pitch shift: the instrument has a wide range and a register break that decide whether a line is comfortable or a fight. This guide covers both, so you can turn a song into a part a clarinetist can actually play.

What the clarinet reads in

The standard soprano clarinet is a B-flat instrument. That single fact drives everything else: when a clarinetist reads and fingers a written C, the pitch that comes out of the instrument is a concert B-flat, a whole step lower than what they read. Put the other way around, the clarinet reads a major second, a whole step, above concert pitch. So if you simply set a concert-pitch part in front of a clarinetist, every note sounds a whole step too low and the song is in the wrong key. The same idea is covered more generally in what transposition is and why instruments need it. To get the music sounding right, you write it a whole step higher than the concert pitch you want to hear.

Doing the transposition

To write a clarinet part, take the concert-pitch music and move every note and the key signature up a major second. Concert C becomes a written D, concert F becomes a written G, concert B-flat becomes a written C. A song that sits in concert C major with no sharps or flats becomes D major with two sharps for the clarinet, and a concert F major part becomes G major. The whole step goes up, not down, because the instrument already pulls the sounding pitch down by that interval, so you have to push the written part up to cancel it out. If you have ever transposed for a B-flat trumpet, this part will feel familiar, but as the next section explains, the similarity ends at the pitch math.

Range and the register break

Here is where the clarinet asks for more thought than a trumpet. The clarinet has an unusually wide range, well over three octaves, and it does not play evenly across all of it. The low notes form the warm, dark chalumeau register; the notes above them, around the open and throat-tone region, are the weakest part of the instrument; and above those the bright clarion register opens up. The seam between the chalumeau and the clarion, the register break, is the spot where players cross over by adding the register key, and rapid passages that sit right on that break, or that hop back and forth across it, are awkward to play cleanly and in tune. A line that reads perfectly well for trumpet can land squarely in this trouble zone once it has been moved up a whole step for clarinet.

So after you have done the pitch transposition, look at where the line actually sits. A melody that hovers in the chalumeau or comfortably up in the clarion will sing; a busy, fast passage that straddles the break may need to be nudged up or down an octave, simplified, or rewritten so the difficult crossings fall on slower notes. Watch the extremes too: pushed up a whole step, a part that was already high in concert pitch can end up near the top of the clarinet's range, where it is loud and demanding, and the throat tones around the break can sound thin if the melody lingers there. None of this changes the transposition interval; it just decides whether the transposed part is one a clarinetist will enjoy or endure. This is the kind of instrument-specific shaping the full transposition guide walks through across instruments.

Get the part from a recording

If what you have is a recording rather than a score, you do not have to transcribe it by ear first. Upload the track to Songscription and it writes out the notes as an editable score in concert pitch. From there you set the clarinet's reading key so the part is transposed up a major second for you, check the line against the range and the register break, fix anything that sits awkwardly, and export a clean clarinet part. The same workflow handles the other common band transpositions, including the related case of transposing a song for alto or tenor sax, so a single transcription can feed parts for several instruments at once.

Frequently Asked Questions

What key does a clarinet read in?

The standard soprano clarinet is a B-flat instrument, so it reads a major second (a whole step) above concert pitch. When a clarinetist plays a written C, the note that sounds is a concert B-flat, a whole step lower. That means a concert-pitch part read straight off the page comes out a whole step too low, so to write a clarinet part you move the concert music up a major second. A key signature with no sharps or flats in concert pitch becomes two sharps for the clarinet.

How do I transpose a song for clarinet?

Take the concert-pitch music and move every note and the key signature up a major second, a whole step. Concert C becomes a written D, concert F becomes a written G, and so on. Then check the result against the clarinet: keep busy passages out of the awkward zone around the register break, and make sure the line still sits in a comfortable part of the range. With Songscription you can transcribe the recording to an editable score, set the clarinet's reading key so the transposition is applied for you, and export the part.

Is clarinet the same transposition as trumpet?

The interval is the same: both the B-flat clarinet and the B-flat trumpet read a major second above concert pitch, so the pitch math for transposing the notes is identical. What differs is everything around it. The clarinet has a much wider range and a register break, the crossing from the lower chalumeau register through the throat tones into the upper clarion register, that the trumpet does not have, so a line that reads fine for trumpet can still be uncomfortable for clarinet if it sits badly across that break.

Can I get a clarinet part from a recording?

Yes. Upload the recording to Songscription and it writes out the notes as an editable score in concert pitch. From there you set the clarinet's reading key so the part is transposed up a major second, adjust anything that sits awkwardly across the register break or runs too high, and export a clean clarinet part shaped for your player, instead of being limited to the keys a published edition happens to offer.

The fastest way to start is on a song you already want a clarinet part for. Upload a recording with Songscription and get an editable score you can set to the clarinet's key and export.