CA conventions
Transcription conventions used in conversation analysis first published in Sacks, Schegloff, and Jefferson (1974), and developed by Gail Jefferson (2004).
Schegloff's Tutorial
Professor Manny Schegloff created a transcription tutorial for his students at UCLA, generously made public. The workshop shows each of the conventions with accompanying audio.
Mondada's multimodality
Professor Lorenza Mondada expanded basic CA conventions to record multimodal apsects of interaction in transcripts.
Transcription 101
Dr Emily Hofstetter outlines the fundamental principles of CA transcription in this excellent seven-minute video.
Transcription as theory
Recommended reading: Ochs, E. (1979). Transcription as theory. In E. Ochs and B. Schieffelin (eds.), Developmental Pragmatics. New York, NY: Academic Press.
EMCA Wiki
The wonderful EMCA Wiki - home of all things CA - has a comprehsive guide to transcription resources, including a summary of software and further reading.
DOTE
DOTE stands for Distributed Open Transcription Environment, created by the wonderful team of researchers and developers at Aarlborg University, supports CA transcription with time stamped video.