This is one of my younger students playing a jazz duet with me. My part is the one up in the higher register, and if you listen to it on its own, it's busy. It moves around, it lands in his gaps, and it sits right on top of the space where his ear wants to be. From where he's sitting, it's a lot to play through. 𝗛𝗲 𝗽𝗹𝗮𝘆𝘀 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗶𝘁 𝗮𝗻𝘆𝘄𝗮𝘆, 𝗮𝗻𝗱 𝘁𝗵𝗮𝘁'𝘀 𝘁𝗵𝗲 𝗽𝗮𝗿𝘁 𝗜 𝘄𝗮𝗻𝘁 𝘁𝗼 𝘁𝗮𝗹𝗸 𝗮𝗯𝗼𝘂𝘁. When you practise on your own, there's nothing in the room telling you where you are. You think you're steady, but you have no way of checking. You slow down slightly before a chord change and speed up slightly after it, and because nothing objects, it starts to feel normal. I hear it all the time with adult learners who have done the work and know the notes properly. The playing is accurate, but it still wanders, and they can't hear it happening because there's nothing to hear it against. 𝗔𝗻𝗱 𝘁𝗵𝗶𝘀 𝗶𝘀 𝘄𝗵𝘆 𝗜 𝗿𝗲𝗰𝗼𝗿𝗱 𝗮 𝘀𝗲𝗰𝗼𝗻𝗱 𝗽𝗮𝗿𝘁 𝗳𝗼𝗿 𝗲𝘃𝗲𝗿𝘆 𝘀𝗼𝗻𝗴. 𝗦𝗼 𝗶𝘁'𝘀 𝘄𝗮𝗶𝘁𝗶𝗻𝗴 𝗳𝗼𝗿 𝘆𝗼𝘂 𝘁𝗵𝗲 𝗺𝗼𝗺𝗲𝗻𝘁 𝘆𝗼𝘂 𝗰𝗮𝗻 𝗽𝗹𝗮𝘆 𝘁𝗵𝗲 𝗺𝗲𝗹𝗼𝗱𝘆 𝗰𝗼𝗺𝗳𝗼𝗿𝘁𝗮𝗯𝗹𝘆. It doesn't matter whether it's me on the other end of the piano, a backing track, or the falling keys moving at tempo on the screen. The moment something else is sounding, you can feel exactly where you are. You know when you've rushed because suddenly you're early. You know when you've hesitated because you're behind. You stop guessing. That's the real reason I record accompaniments for the songs we do here and why I like using the falling keys video as a starting point. It isn't about pressure. It's about giving you a reference point, because you can't correct something you can't locate. It does feel uncomfortable at first. Most people's instinct when they hear another part is to listen to it and drift into it. Holding your own line while something else is happening around you is a skill, and it takes a bit of time. But once you have it, your playing settles in a way that practising alone will never give you. If you've only ever played by yourself, try playing Aura Lee in the Practice Room with the accompaniment track. (Rung 2)