As Nathalie and I discovered, there are various ways of embedding a playable audio file in a post, none intuitive, none in the end effective. For deep-seated personal reasons I was compelled to refuse Marly's recommendation (Mac stuff) and Avus's (YouTube). When MikeM suggested Picosong the process seemed too easy. A glitch occurred but it was down to me, not the software. Second time around I managed to record and play a SONNET I wrote some years ago.
Then I sang and recorded Schubert's
the song I'm presently studying. The minute I knew it worked I deleted it. The performance needed work.
It still does, despite six or seven goes. Two things you must know. This is a classic German Lied where voice and piano enjoy equal standing. My version lasts two minutes, the real thing is double that, the text being separated into lovely islands of sound surrounded by moats of elegant keyboard stuff. Mine is in no sense authentic.
It's also work-in-progress. Without a piano my a capella voice wanders away from the notes. And I'm well aware there's an umlaut in betrübt also that Germans don't pronounce the -chen diminutive suffix the way I do. All I can say it's better than it would have been half a year ago.
Thank you all for your interest, help and patience.
* Now re-sung and re-recorded (many times). Best played fairly quietly.