How to Find a Note You Hear
This lesson gives you a simple method for finding on the grid a note you hear, whether it comes from a melody in your head, a sample or a bass line, and shows you how to train your ear to do it faster.
You hear a melody in your head, you like a sample, a bass line grabs you, and you want to find it in the piano roll. Many producers think you need perfect pitch for that, the rare gift that lets someone name a note without any reference. That's not the case. With a method and a bit of practice, anyone can do it, and this lesson gives you both.
Start with your voice
First, isolate a very short fragment, one or two bars, and loop it. Then hum the first note, and hold it. Your voice works as a bridge between the sound and the grid: as long as you can hold the note, you can compare it with the rows of the piano roll.
Don't worry if you sing badly or if your voice is lower than the sample. You don't need to sing well, just to keep the note in your memory for a few seconds. If it's too high or too low for you, sing it an octave lower or higher: as we saw in the first lesson, it keeps the same name.
Search for the row by going up and down
Play the loop and, at the same time, click a key on the piano roll keyboard, or play it on your MIDI keyboard. Then ask yourself just one question: is my note higher or lower than the one in the sample? Move up or down one row at a time. When you land on it, the two sounds blend; when you're a half step off, you hear a very clear clash instead. That clash, which you've learned to recognize, is your best guide.
Listen to the difference: a half step off grinds, a whole step off still rubs a little, and the right note gives a single sound, just louder. With these landmarks, you'll always know which way to search.
Once you've found the first note, the rest goes faster. For each next note, just ask whether the melody goes up or down, and by how much: a small step of one or two semitones, or a bigger leap. Melodies most often move in small steps, which narrows down the options a lot.
For a bass, look for the lowest note
Bass lines and 808s are the hardest to find. In the low range, the ear judges pitch poorly, small speakers don't reproduce the sub, and an 808 that glides from one note to another muddies things even more. A few habits help a lot. Listen on headphones. Look for your test note one or two octaves above the bass, where the ear is more accurate, then bring it back down: the note's name will be the same. And for an 808 that glides, go with the note it lands on and stays on the longest.
When several instruments play together, the lowest note is the one you want for the bass. It's the ground everything else stands on, and it very often matches the note that gives the current chord its name, as we'll see in the part on chords. In the figure, listen to two chords and follow only the bottom note.
To check, play the loop and sing only the bottom note. Then play that bass line on its own, one octave higher: it should blend with the original without clashing. Compare the two buttons below; the second version is much easier to follow by ear.
Training your ear to hear distances
The method you've just seen relies on what's called relative pitch: starting from a known note, you find the others through the distance between them. It's what most musicians use, and it responds very well to practice. The faster you recognize a half step, a whole step, a big leap or an octave, the less you need to fumble around the grid.
Choose which intervals to practice
The tools, and their limits
Several tools can help you. A tuner displays the note of a held sound. A spectrum analyzer shows the frequencies present, and the peak furthest to the left often matches the fundamental. Some DAWs can also convert an audio melody into MIDI notes. These tools save time, but they get things wrong in very specific cases.
First, they get things wrong because of harmonics. A sound contains other frequencies besides its note, and the tool can latch onto one of them: it then shows the right note an octave too high, or even another note, an octave and a fifth higher. They also get things wrong when several notes sound at once, when there's a lot of reverb or noise, or when the note glides. A distorted 808 is a typical case: the tuner hesitates and jumps from one note to another. So use these tools to check, and let your ear have the last word.
Your turn. Listen to the next phrase as many times as you need. Its first note is A3.
Find the seven notes that follow A3, without looking at the answer. For each note, ask whether the melody goes up or down, and by how many semitones, then check by clicking the rows of your piano roll. Then draw the notes you found in your DAW and compare them with what you heard.
You've reached the end of the first part: you know what a note is, where it sits on the grid and how to find it. The next part looks at the other axis of the piano roll, time, starting with tempo.