On Sat, Jul 29, 2017 at 4:38 AM, Stephen Adolph <[email protected]> wrote:
> I think the problem is voltage level from common audio devices is not high > enough. Need to have at least 2vpp. Most devices put out max 1. > > Well FWIW, I was able to load a program via MP3 file on my iPhone 7. -- John.
