I have to agree that it is possible but in my experience not reliable. Maybe it boils down to the device.
I have an mp3 player that I was using and it works sometimes and not others very frustrating. On Sunday, July 30, 2017, John R. Hogerhuis <jho...@pobox.com> wrote: > > > On Sat, Jul 29, 2017 at 4:38 AM, Stephen Adolph <twospru...@gmail.com > <javascript:_e(%7B%7D,'cvml','twospru...@gmail.com');>> 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. >
