Applications
12 kbit/s CVSD is used by Motorola's SECURENET line of digitally encrypted two-way radio products.
16 and 32 kbit/s CVSD were used by military TRI-TAC digital telephones for use in deployed areas to provide voice recognition quality audio. 16 kbit/s rates were typically used by US Army forces to conserve bandwidth over tactical links. 32 kbit/s rates were typically used by US Air Force forces for improved voice quality.
64 kbit/s CVSD is one of the options to encode voice signals in telephony-related Bluetooth service profiles, e.g. between mobile phones and wireless headsets. The other options are PCM with logarithmic a-law or μ-law quantization.
Numerous arcade games, such as Sinistar and Smash TV, play pre-recorded speech through an HC-55516 CVSD decoder.
Read more about this topic: Continuously Variable Slope Delta Modulation