~ LTC - SMPTE Decoder on Teensy

For synchronisation between several devices SMPTE timecode data is often encoded into audio using LTC or linear time code.

This blog post presents an LTC decoder for a Teensy 3.2 microcontroller with audio shield.

The audio shield takes care of the line level audio input. This audio input is then decoded. The decoding is done by libltc. The library runs as is on a Teensy without modification. The three elements are combined in a relatively simple teensy patch

To use the decoder connect the line level input left channel to an SMPTE source via e.g. an RCA plug.

For code, comments, pull requests please consult the Github repository for the Teensy SMPTE LTC decoder

Code and UGent

teensy_ltc_smpte_decoder.mp4 and teensy_with_audio_shield.jpg