iPod audio to analog input

hi folks,

my first project, think should simple: when ipod touch alarm sounds, light led keep lit until reset button pushed. in noisey environment ipod need wired.

i've read headphone outputs ~1v arduino can't sample fast enough analys that's not i'm after. need know if ipod playing sound of kind or not.

will analog inputs sensitive enough this? digital inputs?

thanks!

i'd use simple transistor amp signal 5v of arduino , you're fine put on analog input.

you can use schmitt trigger convert digital signal have kinda debounce (don't react fast falling edge) because audio signal kind of wave. diode protect bigger negative values might selection.

with arduino sampling rate of 15khz, detect sound.

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