Why Open An Upright Piano To Record With Mics

What Is A Brief History Of Recording Acoustic Pianos?

Recording acoustic pianos has a rich history going back to the early days of audio recording.

In the late 19th century, early piano recordings were captured using phonograph cylinders and early gramophones. The technology was limited, so the full range and depth of the instrument was hard to capture properly.

By the 1920s, recording technology had improved and acoustic recording techniques became more developed. Engineers started finding better ways to capture instruments with microphones and direct-to-disc recording.

In the 1940s and 1950s, magnetic tape changed things again. It allowed higher fidelity, more flexibility and better editing.

By the 1960s and 1970s, multi-track recording gave engineers more control over how they captured the piano and placed it within a song.

From the 1980s to today, digital recording has made piano recording even more flexible. But even with all that technology, the basic question still matters: where do you put the microphone and what part of the piano are you trying to capture?

Why Do You Remove The Front Of An Upright Piano To Record It?

When you open an upright piano, you usually remove the front panel so the internal strings, hammers and soundboard are easier to access.

The main reason is microphone placement. With the panel closed, the sound has to come through the piano cabinet before it reaches the microphones. That can make the recording sound more boxed in or muffled.

When the front panel is removed, the microphones can get closer to the source of the sound. This gives you more control over how bright, direct, warm or roomy the recording feels.

Opening the piano can also help reduce some unwanted reflections and resonances caused by the closed cabinet. Instead of the sound bouncing around inside the piano before reaching the mic, you can capture the instrument more directly.

It does not mean the piano will automatically sound better, but it gives the engineer more options.

What Sound Difference Does Opening An Upright Piano Make?

The sound difference between recording an upright piano open or closed can be pretty noticeable.

With the front panel in place, the sound can feel more muffled, darker or boxed in. That might work for some songs, especially if you want a softer background piano sound, but it can also make the recording harder to shape.

When you remove the front panel, the piano usually sounds clearer and more open. The microphones can capture more of the strings, hammers and resonance, which can make the sound brighter and more defined.

This can be especially useful if the piano is an important part of the track. If the piano needs to sit upfront in the mix, opening it gives you more detail to work with.

That said, it is not always about making the piano brighter. Sometimes opening the piano is simply about control. You can place microphones closer, further away or in stereo positions and decide how much detail and room sound you want.

What Microphone Placement Works Best On An Open Upright Piano?

here is no single perfect microphone position for every upright piano, but opening the piano gives you more useful choices.

Close miking is where you place microphones near the strings. This gives you a more direct and intimate sound. It can work well when the piano needs to be clear in a mix.

Room miking is the opposite approach. You place the microphones further back so they capture more of the piano in the room. This can sound more natural, but it depends heavily on whether the room itself sounds good.

X/Y stereo placement uses two matched microphones placed close together at an angle. This can give you a balanced stereo image without getting too messy.

Mid-side recording is another stereo method that uses a cardioid microphone and a figure-8 microphone. It can give you control over stereo width while still keeping good mono compatibility.

The best placement depends on the piano, the room and the song. A bright upright in a small reflective room may need a different approach to a warmer piano in a larger studio.