The RB-PD2 Stereo Profanity Delay from Sonifex is a 1 RU rackmount unit, stereo audio profanity delay used for live broadcast programs to prevent unwanted or obscene material from being transmitted. It features an automatic audio stretch algorithm that allows between 2 and 55 seconds of delay to be built up live while “on air”, whilst maintaining the correct pitch. The delay can also be acquired by playing a pre-selected audio file on a Compact Flash memory card. When the program is complete, the audio stretch algorithm seamlessly reduces the delay to zero. The RB-PD2 has both balanced analog and AES/EBU digital audio inputs and outputs on 3-pin XLR connectors and provides sample rates up to 48 kHz at 24-bit. It can act as a combined A/D and D/A unit meaning that analog inputs can be output as AES/EBU or vice-versa.