Ian

thanks that looks much better and new feature are good.

Thanks - yes I'm on a Retina display. Maybe a prference to set the font size would be good. A crosshair cusror would be good for reading frequency/amplitide in the spectum. Also a similar idea for the scope. It would be good if distortion (THD) could be measured - that is what I really neeed. I used to use an application called Musicscope which was very good, but the company does not exist anymore and even though it is now free software, it does not support audio input on OSX Big Sur.

Trying this on OSX Big Sur. Seems to run ok but... The red font on the x-y axis is so tiny it is impossible toread. It would be good to have cursors for readout. Can this be done? Without these it just makes nice pictures :)