diff --git a/stb_vorbis.c b/stb_vorbis.c
index 9030c31..ea753df 100644
--- a/stb_vorbis.c
+++ b/stb_vorbis.c
@@ -1693,9 +1693,9 @@ static int codebook_decode_scalar(vorb *f, Codebook *c)
 
 // CODEBOOK_ELEMENT_FAST is an optimization for the CODEBOOK_FLOATS case
 // where we avoid one addition
-#define CODEBOOK_ELEMENT(c,off)          (c->multiplicands[off] * c->delta_value + c->minimum_value)
-#define CODEBOOK_ELEMENT_FAST(c,off)     (c->multiplicands[off] * c->delta_value)
-#define CODEBOOK_ELEMENT_BASE(c)         (c->minimum_value)
+#define CODEBOOK_ELEMENT(c,off)          (c->multiplicands[off])
+#define CODEBOOK_ELEMENT_FAST(c,off)     (c->multiplicands[off])
+#define CODEBOOK_ELEMENT_BASE(c)         (0)
 
 static int codebook_decode_start(vorb *f, Codebook *c)
 {
diff --git a/tests/test_vorbis.c b/tests/test_vorbis.c
index a41c02c..d54ed23 100644
--- a/tests/test_vorbis.c
+++ b/tests/test_vorbis.c
@@ -8,10 +8,11 @@ extern void stb_vorbis_dumpmem(void);
 int main(int argc, char **argv)
 {
    size_t memlen;
-   unsigned char *mem = stb_fileu("c:/x/vorbis/stb_vorbis_crash.ogg", &memlen);
+   unsigned char *mem = stb_fileu("c:/x/sketch008.ogg", &memlen);
    int chan, samplerate;
    short *output;
    int samples = stb_vorbis_decode_memory(mem, memlen, &chan, &samplerate, &output);
+   stb_filewrite("c:/x/sketch008.raw", output, samples*4);
    return 0;
 }
 #endif