Replay a Piano Chord Progression at 0.5x for Transcription

Why transcribing from YouTube is so painful

When you're trying to transcribe a piano chord progression by ear, every second of the video matters. A single chord voicing might last only two beats at normal tempo. By the time you reach for the spacebar or scrub back with the mouse, the sound is gone and your mental buffer is empty. The standard approach, playing the video, pausing, scrubbing back, playing again, forces you to repeat the same 5-second sequence maybe 20 times per bar. For a 32-bar song, that's 640 scrubs. Your ears get tired, your patience runs out, and you end up guessing the third or seventh of a chord because you can't isolate the inner voices. The problem isn't your ear; it's that YouTube's native controls weren't built for deep listening work.

The shape of a solution

Instead of fighting the video player, you need a tool that lets you mark a precise section of the timeline and repeat it at a slower speed, without ever touching the scrub bar again. The workflow is simple: find the bar you want to transcribe, set a tight A-B loop around it, drop the playback speed to 0.5x, and listen in focused cycles until you can write down every note. Then advance the loop to the next section and repeat. With YouTube Looper Pro, that entire process takes seconds per bar, not minutes.

Step by step

1. Open the YouTube video with the piano performance you want to transcribe. Let it load fully so the timeline is responsive.
2. Scroll to the section of the song where your target chord progression begins. For example, the second chorus of a Bill Evans tune where the voicings get denser.
3. Set the A marker at the start of the first bar you want to transcribe. Use the keyboard shortcut or click the marker button in YouTube Looper Pro to place it with second-precision accuracy.
4. Let the video play until the end of that bar (or a 4-bar phrase). Pause at the boundary and set the B marker. You now have a loop locked to exactly that window.
5. Reduce playback speed to 0.5x using the speed control dropdown. The chord voicings will now unfold at half speed, giving you twice the time to hear each note.
6. Listen through the loop 5 times. On the first pass, focus on the bass note. On the second, identify the root of the chord. On the third, pick out the third and seventh. Use the remaining passes to confirm extensions and alterations.
7. Write down the chord on paper or in a notation app. Don't move on until you can hum each voice in the chord from memory.
8. Clear the loop markers (or use the jump-to-A shortcut to re-check). Move the B marker forward to the next 4-bar phrase by clicking further along the timeline.
9. Repeat steps 3 through 8 for each section of the song. Save each loop set with a descriptive name like 'Verse 2 chords' so you can revisit them later without resetting markers.
10. After finishing all sections, export your loop library as a JSON file for backup or sharing with a teacher. Your chord chart is now complete.

Why this works better than scrubbing and pausing

The obvious alternative is to use YouTube's built-in pause and manual scrub bar. But that approach has three fatal flaws. First, every time you pause and scrub, you lose the musical context, the beat, the phrasing, the feel. Second, manual scrubbing is imprecise; you often land a few frames before or after the chord, forcing you to re-scrub. Third, you can't slow the video below 0.5x without YouTube Looper Pro's extended speed range, so fast passages remain unintelligible. With YouTube Looper Pro, the loop stays locked to the exact same audio segment, the speed stays at your chosen rate, and you never have to take your hands off the keyboard to click the timeline. That consistency lets your ears build a mental model of the chord over repeated listens, rather than resetting every time the playback jumps to a different spot.

Frequently asked questions