Names for Multichannel Tracks (Pro Tools HD or Pro Tools with Complete Production Toolkit Only) When recording to multichannel surround tracks, audio file and clip names for each channel are appended with the following suffixes: Multichannel Format File and Clip Suffixes LCR L, C, R Quad L, R, Ls, Rs LCRS L, C, R, S 5.0 L, C, R, Ls, Rs 5.1 L, C, R, Ls, Rs, LFE 6.0 L, C, R, Ls, Cs, Rs, LFE 6.1 L, C, R, Ls, Cs, Rs 7.0 L, C, R, Lss, Rss, Lsr, Rsr 7.1 L, C, R, Lss, Rss, Lsr, Rsr, LFE 7.0 SDDS L, Lc, C, R, Rc, Ls, Rs 7.1 SDDS L, Lc, C, R, Rc, Ls, Rs, LFE