On Wed, Jun 21, 2017 at 10:10 PM, John Jason Jordan wrote:
> On Wed, 21 Jun 2017 15:45:29 -0700
> Denis Heidtmann dijo:
>
> >I do not know much about what you describe, but you could answer the
> >frequency issue by recording the sound into Audacity on
Clearly if the frequency changes it is not 60 Hz. Is there a chance that
it is a feedback of some sort? I have run into problems when had both the
input and output selected, but do not recall the details as it was a few
years ago.
On Wed, Jun 21, 2017 at 10:10 PM, John Jason Jordan
John,
I do not know much about what you describe, but you could answer the
frequency issue by recording the sound into Audacity on the laptop.
(Assuming you do not have a 'scope.)
Is there a chance that the connections which produce the hum include two
different AC powered devices with a (not