Teac TN-3B is a digital recording and playback device by the Japanese audio equipment manufacturer, Teac Corporation. It was released in the late 1970s as part of Teac's digital audio product line. The TN-3B is capable of recording and playing back digital audio signals at a resolution of 16 bits and a sampling rate of 44.1 kHz, which is the standard format for compact disc (CD) audio. It features digital outputs, including AES/EBU, and supports data compression using the modified discrete cosine transform (MDCT) algorithm. The TN-3B is known for its high-quality audio reproduction and has been used in various studio applications, including audio post-production and mixing.