diff options
Diffstat (limited to 'flib/src/ss~.c')
| -rw-r--r-- | flib/src/ss~.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/flib/src/ss~.c b/flib/src/ss~.c index 8ad1caa..83baf82 100644 --- a/flib/src/ss~.c +++ b/flib/src/ss~.c @@ -18,7 +18,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -/* calculates the spectral smoothness of one frame according to Krimphoff et al. 1994*/ +/* calculates the spectral smoothness of one frame according to McAdams 1999. Takes magnitude spectrum as input*/ #include "flib.h" static t_class *ss_class; @@ -35,9 +35,9 @@ static t_int *ss_perform(t_int *w) t_int N = (t_int)(w[3]),M = N >> 1,n; t_float I = 0, buf[M]; for(n = 0; n < M; buf[n++] = *in++); - for(n = 2; n < M - 1; n++){ + for(n = 2; n < M - 1; n++){ if(buf[n] != 0 && buf[n-1] != 0 && buf[n+1] != 0) - I += (buf[n] - (buf[n-1] + buf[n] + buf[n+1]) / 3); + I += (20 * log10(buf[n]) - (20 * log10(buf[n-1]) + 20 * log10(buf[n]) + 20 * log10(buf[n+1])) / 3); } outlet_float(x->x_obj.ob_outlet, I); |