Examples described herein involve providing playback device calibration user interfaces to guide a calibration process for one or more playback devices in a playback environment. In one example, a network device receives audio samples continuously from a microphone of the network device for a predetermined duration of time, wherein the predetermined duration of time comprises a plurality of periodic time increments. At each time increment within the predetermined duration of time, the network device dynamically updating on a graphical display of the network device, (i) a representation of a frequency response based on audio samples that have been received between a beginning of the predetermined duration of time and the respective time increment, and (ii) a representation of the respective time increment relative to the predetermined duration of time.