SonoAlti 2, SonoAlti 2V, and ColorAlti 2 share 32 different types of audible alarms that can be used in any phase of a skydive. Although one can use any alarm one wishes, certain alarms (those higher-pitched ones) are intended to be freefall alarms and others are intended for canopy or ascent because of their acoustic characteristics. In the table below, a check indicates which alarms were originally intended for what purpose; a red check (✓) indicates that an alarm is one of the default alarms (default settings are on Preset 1 on a new altimeter). The examples given use the default alarm center frequency of 4.0 kHz.

These altimeters also have a number of internally used sounds that indicate various states of the altimeter. The following table shows these sounds and how they are activated.