Active Motor Noise Cancellation available in the latest firmware just released for update.
X1/X1-Carbon and AMS Firmware Release History | Bambu Lab Wiki
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Heard about the possibility of this being added to the X1 in some interview. I’m really glad it made it. The only thing I printed after this update and letting it do the calibration (it took 15 minutes) was quite simple and small, I did a small peg and a small arm thingy, but as my first impression it felt like I could only hear the fans.
I’ll know when I do more prints to test movement along more axes at different speeds how much noise has actually been suppressed, but I’m optimistic with this and it seems cool.
First impression is wow. What a difference. You can barely hear the printer, except for the fans. The high pitch sound is gone. Highly recommended to install this firmware update.
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This looks like a great update
Please be sure to bring out the Active Motor Noise Cancellation for the P1S too. THANKS!!
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Was announced will be coming in a firmware update shortly for the P series.
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Great, thank you for the information.
Can i look that up somewhere?
No information, was just mentioned on their socials was coming.
OK thanks. Then let’s hope it comes to the P1S too.
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This is really good. It’s a lot quieter now.
How does this technically work?
The printer already has vibration sensors that it uses for improving print quality. The noise comes from the stepper motors when they are given more current than they need. The calibration runs through various motions, senses vibration levels, and adjusts the motor drive current to what is necessary, cutting noise. This first appeared on the A1 Mini. Some of us find that print quality improves too.
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Feels like magic…
This update really works and it is great!
Thank you BambuLab for making the best printer in the market even better!
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I don’t see the firmware upgrade yet 
Reboot your printer. It will show up once you power cycle.
This is a game changer. I love this update!
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Pretty remarkable. The reduction in sound is very obvious , especially second layer onwards where motor noise increased substantially. Still hear the head moving fast on the rods but barely (chamber fan to 60%)… As long as its all done using the vibration sensor (and not some hidden microphone we never knew about), Love it!! Great work. As others , who also own P1 models, hope to see it soon incorporated in the next release.
I cant say it make the printer quiet, as their still a lot of noise, from head,rods,fans,… but print quality seems a lot better even if it was already very nice, it is almost perfect (tryed 250mm/s PLA+)
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While we are at it - why not the AMS motors too 
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As @LaterRon already wrote, it’s not wizardry, but it feels like it. Does anyone know exactly how this motor noise cancelling works? I’m really interested in how this can be achieved.
Yeah, it’s just like magic. However, the fan noise you will only get reduced by replacing them with quieter versions.
From what I understand they use the accelerometer to set the vref of the stepper driver so they make less noise.