What "3.5mm microphone"? And what "keyboard"?
3,5mm jack is usualy used for the "computer" type mics, these are usualy electret mics requiring an voltage for powering (equipped usualy with stereo TRS 3,5mm jack - signal, power, ground, typically powered by 3-9V).
To answer your question: such adaptor will work for sure but only physically / mechanically. If are you lucky and have an battery-powered mic with 3,5mm output jack then you can use such 3,5/6,3 adaptor and it should work. If your mic is electret without internal battery I'm afraid it cannot work.
On most keyboards with 6,3mm mic input jack is an dynamic microphone expected, mic input usualy doesn't provide powering (there are some exceptions providing phantom power but it is different powering scheme than you need for computer type mic and uses usualy XLR. Or say Microkorg has input with powering for electret mic but it is already 3,5mm. I have never seen 6,3 mic input with an power for mic).
If your mic is electret without internal battery then you'll need an preamp for electret, or an internal modification of keyboard for electret mic input.
Or take female 3,5mm jack, male 6,3mm jack, an capacitor, resistor, battery, some shielded wires and some time to properly connect electret with 3,5mm jack output to 6,3mm mic input with powering mic from the battery.
Or simply use some other dynamic mic with 6,3mm jack.
3,5mm jack is usualy used for the "computer" type mics, these are usualy electret mics requiring an voltage for powering (equipped usualy with stereo TRS 3,5mm jack - signal, power, ground, typically powered by 3-9V).
To answer your question: such adaptor will work for sure but only physically / mechanically. If are you lucky and have an battery-powered mic with 3,5mm output jack then you can use such 3,5/6,3 adaptor and it should work. If your mic is electret without internal battery I'm afraid it cannot work.
On most keyboards with 6,3mm mic input jack is an dynamic microphone expected, mic input usualy doesn't provide powering (there are some exceptions providing phantom power but it is different powering scheme than you need for computer type mic and uses usualy XLR. Or say Microkorg has input with powering for electret mic but it is already 3,5mm. I have never seen 6,3 mic input with an power for mic).
If your mic is electret without internal battery then you'll need an preamp for electret, or an internal modification of keyboard for electret mic input.
Or take female 3,5mm jack, male 6,3mm jack, an capacitor, resistor, battery, some shielded wires and some time to properly connect electret with 3,5mm jack output to 6,3mm mic input with powering mic from the battery.
Or simply use some other dynamic mic with 6,3mm jack.
Statistics: Posted by Ruprecht — Wed Jun 18, 2025 4:37 pm