diff --git a/filter/delay.c b/lib/delay.c
similarity index 100%
rename from filter/delay.c
rename to lib/delay.c
diff --git a/filter/delay.h b/lib/delay.h
similarity index 100%
rename from filter/delay.h
rename to lib/delay.h
diff --git a/filter/stereo_encoder.c b/lib/stereo_encoder.c
similarity index 100%
rename from filter/stereo_encoder.c
rename to lib/stereo_encoder.c
diff --git a/filter/stereo_encoder.h b/lib/stereo_encoder.h
similarity index 100%
rename from filter/stereo_encoder.h
rename to lib/stereo_encoder.h