The iPhone’s headphone jack works like any other audio output line, and doubles as an audio input and output line. Connect any 3.5mm audio cable to send audio from your iPhone to a set of external speakers, an audio card or a Digital Audio Workstation, or DAW, such as Apple’s GarageBand or Logic Studio application. The GarageBand iOS app enables support for mobile editing and recording with your iPhone. For high-quality audio output, consider getting external-powered audio devices to reduce interference and signal loss from your iPhone’s audio output. Tips Warnings Writer Bio
