Hallo my frieds,
yes, I am reading all these suggestions, and have already done some of them. I.e. the pilot tone suggested by DB8TF is implemented in the actual version 0.64.
The pilot tone is a little peak at 100Hz. And the spectrum display has a red 100 Hz line for tuning.
I am currently working to fix a very complex issue, I rewrite the Windows Audio Driver, which is quite complex to get it reliably working. Unfortunately all the free, open software for Windows Audio has many problems, so it was neccessary to fix that. This will take about one week, then I publish a new version.
The question from here and from emails are answerded in a new FAQ on https://www.dj0abr.de/dokuwiki/doku.php?id=de:start
When the current work on the audio driver is finished, I will have more time to participate here in the forum.