In addition to the built-in microphone, Spire Studio has two XLR/TS combo jacks and Grace Design preamps for pristine clarity. Connecting a microphone or instrument to Input 1 will disable the internal microphone, but connecting to Input 2 will not. Among the three inputs (Internal Microphone, Input 1 and Input 2) you may have a maximum of two inputs active at any given time.
Spire Studio has two 3.5 mm (1/8") stereo headphone outputs, one on the front and one on the back. These outputs can be used to monitor while recording or to listen while playing back your project. The two outputs can be used simultaneously so two people may listen at once!