A computer readable memory storage device having instructions stored thereon that are executable by a processor and which, when executed by the processor, cause the processor to provide vocal effect processing, the instructions comprising: instructions executable to receive a first audio signal from a first vocal microphone and a second audio signal from a second vocal microphone, the first and second audio signals (106a, 106b) representative of audible sound detected by each of the first vocal microphone and the second vocal microphone; instructions executable to determine a proximate location of a user with respect to the first vocal microphone and the second vocal microphone based on proximity sensor data from a proximity sensor; instructions executable to identify at least one of the first vocal microphone and the second vocal microphone as an activation target in response to determining the location of the user with respect to the first vocal microphone and the second vocal microphone; instructions executable to combine the first and second audio signals (106a, 106b) by cross fading between the first and second audio signals based on the activation target, thereby providing a single activation-based audio signal; instructions executable to employ hysteresis to avoid, in said cross fading, rapid cross fading between the first audio signal received at the first vocal microphone and the second audio signal received at the second vocal microphone when the proximate location of the user and the estimated activation target is determined as being substantially equal between the first vocal microphone and the second vocal microphone; and instructions executable to apply a vocal effect to the single activation-based audio signal. instructions executable to receive a first audio signal from a first vocal microphone and a second audio signal from a second vocal microphone, the first and second audio signals (106a, 106b) representative of audible sound detected by each of the first vocal microphone and the second vocal microphone; instructions executable to determine a proximate location of a user with respect to the first vocal microphone and the second vocal microphone based on proximity sensor data from a proximity sensor; instructions executable to identify at least one of the first vocal microphone and the second vocal microphone as an activation target in response to determining the location of the user with respect to the first vocal microphone and the second vocal microphone; instructions executable to combine the first and second audio signals (106a, 106b) by cross fading between the first and second audio signals based on the activation target, thereby providing a single activation-based audio signal; instructions executable to employ hysteresis to avoid, in said cross fading, rapid cross fading between the first audio signal received at the first vocal microphone and the second audio signal received at the second vocal microphone when the proximate location of the user and the estimated activation target is determined as being substantially equal between the first vocal microphone and the second vocal microphone; and instructions executable to apply a vocal effect to the single activation-based audio signal.