A phone stand includes a phone holder for coupling to a phone for conducting an audio session, the audio session including at least one voice session conducted by an application executing on the phone and a plurality of microphones including a particular microphone closer to a location where a user is expected to be positioned than other microphones. The phone stand further includes a system controller configured to: receive sound signals from the particular microphone, the sound signals comprising the user's speech; separate the sounds signals into speech signals and non-speech signals; obtain one or more input mixing attributes for the speech signals and the non-speech signals; modify the speech signals and the non-speech signals based on the one or more input mixing attributes; generate mixed signals by combining the modified speech signals and the modified non-speech signals; and send the mixed signals to the phone.