Hello folks,
I'm working on a travel guitar with a built in audio interface to hook up to an iPhone or other. I'd like to pull in the preamp-ed guitar signal through one of the two stereo line ins on the audio shield, and ideally also a second channel coming from the mic input (Ideally coming from the electret mic on a set of earbuds). My initial thought was to use the mic input on the Teensy audio shield but it does not look like you can use that as one channel simultaneously with the line in (or one side of the line in). I saw this post regarding mixing the two, but my intent is to keep two separate channels. Then I moved to just using each of the stereo line ins, which a mic pre / +5v electret preamp on one side and guitar preamp on the other side. I'm worried that these two sources will not be matched in impedance and I'm not sure whether I can treat the stereo line in as two mono inputs like that or if they have really be a stereo pair of inputs. Any thoughts would be helpful, I appreciate it!
I'm working on a travel guitar with a built in audio interface to hook up to an iPhone or other. I'd like to pull in the preamp-ed guitar signal through one of the two stereo line ins on the audio shield, and ideally also a second channel coming from the mic input (Ideally coming from the electret mic on a set of earbuds). My initial thought was to use the mic input on the Teensy audio shield but it does not look like you can use that as one channel simultaneously with the line in (or one side of the line in). I saw this post regarding mixing the two, but my intent is to keep two separate channels. Then I moved to just using each of the stereo line ins, which a mic pre / +5v electret preamp on one side and guitar preamp on the other side. I'm worried that these two sources will not be matched in impedance and I'm not sure whether I can treat the stereo line in as two mono inputs like that or if they have really be a stereo pair of inputs. Any thoughts would be helpful, I appreciate it!