diff --git a/doc/documentation.html b/doc/documentation.html
index ee1399b3..bdd16fb7 100644
--- a/doc/documentation.html
+++ b/doc/documentation.html
@@ -341,7 +341,7 @@
-p
|
- Do exhaustive LP coefficient quantization optimization. This option overrides any -q option. It is expensive and typically will only improve the compression a tiny fraction of a percent.
+ Do exhaustive LP coefficient quantization optimization. This option overrides any -q option. It is expensive and typically will only improve the compression a tiny fraction of a percent. -q has no effect when -l 0 is used.
|
diff --git a/man/flac.sgml b/man/flac.sgml
index 0c9b5a17..c7e73c68 100644
--- a/man/flac.sgml
+++ b/man/flac.sgml
@@ -285,7 +285,8 @@
Do exhaustive search of LP coefficient
- quantization (expensive!). Overrides -q
+ quantization (expensive!). Overrides -q,
+ does nothing if using -l 0
diff --git a/src/flac/main.c b/src/flac/main.c
index 12d41cc4..c67bafef 100644
--- a/src/flac/main.c
+++ b/src/flac/main.c
@@ -355,7 +355,7 @@ int usage(const char *message, ...)
printf(" -9 : synonymous with -l 32 -m -e -r 99 -p (very slow!)\n");
printf(" -e : do exhaustive model search (expensive!)\n");
printf(" -l max_lpc_order : 0 => use only fixed predictors\n");
- printf(" -p : do exhaustive search of LP coefficient quantization (expensive!); overrides -q\n");
+ printf(" -p : do exhaustive search of LP coefficient quantization (expensive!); overrides -q, does nothing if using -l 0\n");
printf(" -q bits : precision of the quantized linear-predictor coefficients, 0 => let encoder decide (min is %u, default is -q 0)\n", FLAC__MIN_QLP_COEFF_PRECISION);
printf(" -r level : rice parameter optimization level (level is 0..99, 0 => none, default is -r 0, above 4 doesn't usually help much)\n");
printf(" -V : verify a correct encoding by decoding the output in parallel and comparing to the original\n");