YAMAHA PSR SX 900 Keyboard | Audio USB RFI Noise Issue 

UPDATE: After a few more tests, I conclude that it's a mains power ground loop hum and with no quick solution at the moment. Why no solution yet? Well... The Mains Power adaptor that is supplied by Yamaha (Original Yamaha) does not have any earth/ground pin to the main wall plug. This is a major problem that is creating a ground loop hum. Since my laptop's Mains Power adaptor has a ground pin, connecting the USB from laptop to keyboard with no ground pin, leads to voltage variation between the two devices, inducing a hum at the output audio (because they are connected to a USB mixer, connected to the same laptop). The ground connection of both devices needs to be equal and zero volts. The only solution is to ground the power adaptor of the keyboard. Incidentally, my KORG keyboard has 3-pin grounded mains power and does not suffer from this major issue. This is Yamaha's 1 cent saving strategy on a $3000 keyboard. Using this keyboard on a live stage will surely have hum issues. Disappointing. P.S. My audio leads are TRS balanced and the ground loop issue has nothing to do with it. No USB cable, no issues.

Thank you for pointing out this problem I wonder if you use for the MIDI input output that may resolve the issue

I have a problem with a slight squealing sound that started showing up on my speakers and headphones when used. I made sure iPhone and iPad had settings adjusted off as mentioned in troubleshooting, disconnected an internet extender I have. I wonder if anyone else has had this issue.

Thanks for your video. I bought a few months ago that PSR-A 5000. It's more or less the same, just more oriental sounds. I'm having major difficulties trying to use it as a midi keyboard or even export stuff. 1. When I use the audio output it sounds pretty terrible. Both in mono and stereo. And I'm using top notch sound card and headphones. 2a. Exporting a song is pure nightmare. You need a usb stick (in 2022? really?) to export a midi file that is absolute terror when you bring it in the DAW (I use logic). Obviously you can't get the same sounds which is a shame. There should be a yamaha plugin so that you could have your sounds. 2b. When I import a song as an audio, it's also a nightmare. The quality, I don't know. I'm really not convinced. Whereas the sound from the speakers is stellar. It's a beautiful machine.

I have same problem, but I haven’t try on the idefender+. To see if this will solve the issue. So has anyone try it?

Sounds like an Earth loop issue. Is the laptop power supply also plugged in? You should try an audio isolation device between the keyboards audio outputs and your mixer.

Try disconnecting the laptop power supply, you may have an earth loop. You can also try a DI box or a ground loop isolator but usually in my experience it's caused by the laptop power supply.

In my experience, I''ll appoint to the Tolby Phillips sugestion. It's recommended to have plugs with ground connections, as the mixers manuals usually says. Also the laptops can cause such issues, even unplugged from the electrical plug (only with battery).

Other than this you had issues w the piano you have encountered software, hardware, keys, speakers built not working, glitches on the performance? I want to buy this I have never own Yamaha only Casio, Roland and Korg . Mainly for brass sounds I kinda want to give Yamaha a try. I was going for modX but I heard so much cons or glitches lately .

Hi have you triad an "Isolation USB Load Resistor" search for them on ebay, I had a similar problem with some out board gear. it works perfectly

Use Midi connection, all keyboards have some glitch on something that another make doesn't. Just so happens thats the one here . Just swapping a connection, job done.

I just got my PSR sx900 and have the same problem when the USB connection to the computer is connected along with the line out going into my PA system. It sounds terrible. I have a Yamaha MODX don't have the same problem when connecting the USB + line out to the PA. Somewhat disappointed that Yamaha didn't do a good job shielding the instrument given that I spent more than 2000 for it. Will try using shorter cables with a.DI box. That might work.

Got the same issue with my Roland TR-6S. When it powered through USB plugged into telephone charger - there is no noise tho. When it connected to computer with the very same usb cable - same noise. No idea how to manage it. Will follow Your channel - if You'll find a clue - please, share!

this is a very common problem, that can occur with any USB audio or midi gear. possible cheap solutions would be 1) try different USB cable 2) try different USB Port 3) install a PCIe Card, as USB Hub 4) use such Widget, as the IDefender - there are other brands, too. but this one seems to be pretty common. 5) just disconnect, insulate the ground PIN, on the B-Side of your USB cable. thats an annoying issue, but you propably already found out, that its fixable. i hope so. It was just a shitty idea, to introduce USB in Audio Industry. so Its not Yamaha's fault, in first Place^^

i have yamaha psr A5000. same problem. i temperly fix it. use. plug inz. universal audio. c-sute

Am Having a problem taking MP3 off the internet loading it to my USB stick . When I do this , I first convert the MP3 to WAV files. However when I insert the USB stick in the PSR SX900 the songs do not show up?? Have you had this problem?? what am I doing wrong ??

Hi, it is Ground Loop Issue - not in same potential, simple brumm effect. No problem with your SX900, unconnect your laptop psu.

Recently got this same keyboard and tried rigging up to focusrite sound card & computer..exact same noise issue. Using unbalanced cables..everything plugged into same gang extension & ferrite USB

Mic/guitar input noise while plugged in but i don't know how to solve the problem

I am having same problem with yamaha psr I455,noisy recording. and laptop is on battery, not in plugged mode ,while recording

You need to buy a iDefender+ and problem solved. I use it for my noisy PSR-A5000 and MODX8. It's expensive but it's the only solution to this well known Yamaha problem. The iDefender+ needs to be powered throug usb C, otherwise the problem will continue.

Ground Loop Issue! Try lifting the grounds on all connectefd devices.

Turn down the gain on the mic input on the keyboard or unplug the input/mic cable and see if you hear noise

I also have this keyboard this problem is old in this line. The best solution is to always use the MIDI DIN connection and not the USB one. Note that when using USB connected to the computer, all equipment connected to the computer can generate audio interference, especially the computer fans. Connections should not be made in a loop, for example: PSR USB- computer - computer audio - keyboard auxiliary input.

thats a ground loop brother

use a di box

Use an unbalanced cable

Glad I seen this I will not be going with Yamahas

Did you get a fix for this ?