X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=doc%2Fdesign%2Fresampling.tex;h=cb7388eb89937a4589c134f0c8a5cbade1e0d285;hb=0a93237cb5e4642d3b698ff9b7d0cfae5401478c;hp=cf9cfb1edc220bcdfa6f242b4aeee94427c2a0d5;hpb=a5b59faff75265d3256ad0dbd9f0c69e51e31ce4;p=dcpomatic.git

diff --git a/doc/design/resampling.tex b/doc/design/resampling.tex
index cf9cfb1ed..cb7388eb8 100644
--- a/doc/design/resampling.tex
+++ b/doc/design/resampling.tex
@@ -53,4 +53,11 @@ and $C_A$, resample the audio to $R_A$ where
 R_A &= \frac{C_V F_A}{F_V}
 \end{align*}
 
+Once this is done, consider 1 second's worth of content samples ($C_A$
+samples).  We have turned them into $R_A$ samples which should still
+last 1 second.  These samples are then played back at $F_A$ samples
+per second, so they last $R_A / F_A$ seconds.  Hence there is a
+scaling between some content time and some DCP time of $R_A / F_A$
+i.e. $C_V / F_V$.
+
 \end{document}