On 3/1/21 12:04 PM, Tim R wrote:
Cheap USB microphone, laptop, Audacity? (Audacity is free recording software with lots of extras, does frequency, etc)


Great idea. I have Audacity. I could just play the audio output and
either capture with mic or feed into soundcard and then see what it is
in Audacity. I think that's what I'll do, although I like Phil's
suggestion of a DVM with freq counter, been keeping an eye out for one.