Hi, Beakybird,
the headset R.S. phone may be what I need for my PSR-740.
I am having trouble recording via PSR-line-out 'cause the mic level is so low. When singing, one listens also to the live voice and looks OK, but when recording, only the signal through the wires gets recorded and the voice, one finds, is so low.
I also play the harmonica (harp) and the PSR-740 together, using a head brace. I do have a small head mic that can be clamped to the harp holder, and being small can be cupped into the hands. But that type of mic does not have a battery and does not work through the PSR. The one you describe, I hope, will work.
Have you gotten good sigal ratio (voice-to- keyboard-sounds) WHEN RECORDING to an external device (WAV's to a PC, for instance), with that headset mic IN THE 740?
Do you get good results with PSR's VocalHarmony?
Thanks for replying.
mbl.