The Beatles usually "warmed up" by playing old songs they had learned growing up. Many of these were captured on camera or tape during the sessions. Not all the songs were complete, or true to their original versions. When the band went from playing old songs to trying out new ones, problems came up. Lennon, McCartney, and Harrison each wanted certain things for their music, and enough time to make the records the best they could be. This did not always work out, and they sometimes insulted each other for trying to outdo the others, or for letting their musical influences show. It made the sessions unpleasant.