diff --git a/source/engine/circbuf.c b/source/engine/circbuf.c
index df5f9c0..7f63bbc 100644
--- a/source/engine/circbuf.c
+++ b/source/engine/circbuf.c
@@ -3,6 +3,15 @@
 #include "util.h"
 #include "assert.h"
 
+struct circbuf *circbuf_make(size_t size, unsigned int len)
+{
+    struct circbuf *new = malloc(sizeof(*new));
+    new->len = powof2(len);
+    new->data = calloc(sizeof(short), new->len);
+    new->read = new->write = 0;
+    return new;
+}
+
 struct circbuf circbuf_init(size_t size, unsigned int len)
 {
     struct circbuf new;
diff --git a/source/engine/circbuf.h b/source/engine/circbuf.h
index 52f9600..84af514 100644
--- a/source/engine/circbuf.h
+++ b/source/engine/circbuf.h
@@ -11,6 +11,7 @@ struct circbuf {
     unsigned int len;
 };
 
+struct circbuf *circbuf_make(size_t size, unsigned int len);
 struct circbuf circbuf_init(size_t size, unsigned int len);
 void cbuf_push(struct circbuf *buf, short data);
 short cbuf_shift(struct circbuf *buf);
diff --git a/source/engine/datastream.c b/source/engine/datastream.c
index cea9a5f..65fd813 100755
--- a/source/engine/datastream.c
+++ b/source/engine/datastream.c
@@ -38,7 +38,7 @@ static void render_audio(plm_t * mpeg, plm_samples_t * samples, void *user)
 
     for (int i = 0; i < samples->count * CHANNELS; i++) {
         t = (short)(samples->interleaved[i] * SHRT_MAX);
-        cbuf_push(&ds->astream.buf, t*5);
+        cbuf_push(ds->astream->buf, t*5);
     }
 }
 
diff --git a/source/engine/datastream.h b/source/engine/datastream.h
index 1edd282..30d864c 100755
--- a/source/engine/datastream.h
+++ b/source/engine/datastream.h
@@ -3,7 +3,8 @@
 
 #include <stdint.h>
 #include <pl_mpeg.h>
-#include "sound.h"
+
+struct soundstream;
 
 struct datastream {
     plm_t *plm;
@@ -14,7 +15,7 @@ struct datastream {
     uint32_t texture_y;
     uint32_t texture_cb;
     uint32_t texture_cr;
-    struct soundstream astream;
+    struct soundstream *astream;
 };
 
 struct Texture;
diff --git a/source/engine/dsp.c b/source/engine/dsp.c
index 45010aa..0dbe973 100644
--- a/source/engine/dsp.c
+++ b/source/engine/dsp.c
@@ -159,15 +159,10 @@ struct dsp_filter dsp_filter(void *data, void (*filter)(void *data, short *out,
 {
     struct dsp_filter new;
     new.data = data;
-    data.filter = filter;
+    new.filter = filter;
     return new;
 }
 
-void dsp_filter(short *in, short *out, int samples, struct dsp_delay *d)
-{
-
-}
-
 void dsp_rectify(short *in, short *out, int n)
 {
     for (int i = 0; i < n; i++)
diff --git a/source/engine/mix.c b/source/engine/mix.c
index 2c873cd..feab359 100644
--- a/source/engine/mix.c
+++ b/source/engine/mix.c
@@ -18,6 +18,11 @@ struct bus *first_free_bus(struct dsp_filter in) {
     return NULL;
 }
 
+void bus_free(struct bus *bus)
+{
+    bus->on = 0;
+}
+
 void bus_fill_buffers(short *master, int n) {
     for (int i = 0; i < 256; i++) {
         if (bus[i].on != 1) continue;
diff --git a/source/engine/sound.c b/source/engine/sound.c
index f90cab4..d9a2d0d 100755
--- a/source/engine/sound.c
+++ b/source/engine/sound.c
@@ -8,6 +8,7 @@
 #include "time.h"
 #include "music.h"
 
+
 #include "SDL2/SDL.h"
 
 #include "mix.h"
@@ -41,9 +42,9 @@ void new_samplerate(short *in, short *out, int n, int ch, int sr_in, int sr_out)
 
 struct wav change_samplerate(struct wav w, int rate)
 {
-    int samples = sizeof(short) * w.ch * w.frames;
-    short *new = malloc(samples);
-    new_samplerate(w.data, new,
+    //int samples = sizeof(short) * w.ch * w.frames;
+    //short *new = malloc(samples);
+    //new_samplerate(w.data, new,
 
 
 
@@ -52,9 +53,8 @@ struct wav change_samplerate(struct wav w, int rate)
 
     int oldframes = w.frames;
     w.frames *= (float)rate/w.samplerate;
-
+    int samples = sizeof(short) * w.ch * w.frames;
     w.samplerate = rate;
-    int samples = sizeof(short)*w.ch*w.frames;
     short *new = malloc(samples);
     SDL_AudioStreamGet(stream, new, samples);
 
@@ -168,10 +168,17 @@ struct wav make_sound(const char *wav)
     return mwav;
 }
 
+struct soundstream *soundstream_make()
+{
+    struct soundstream *new =  malloc(sizeof(*new));
+    new->buf = circbuf_make(sizeof(short), BUF_FRAMES*CHANNELS*2);
+    return new;
+}
+
 struct sound *play_sound(struct wav *wav)
 {
     struct sound *new = calloc(1, sizeof(*new));
-    new.data = wav;
+    new->data = wav;
 
     new->bus = first_free_bus(dsp_filter(new, sound_fillbuf));
     new->playing = 1;
@@ -182,12 +189,12 @@ struct sound *play_sound(struct wav *wav)
 
 int sound_playing(const struct sound *s)
 {
-    return s.playing;
+    return s->playing;
 }
 
 int sound_paused(const struct sound *s)
 {
-    return (!s.playing && s.frame < s.data->frames);
+    return (!s->playing && s->frame < s->data->frames);
 }
 void sound_pause(struct sound *s)
 {
@@ -208,14 +215,14 @@ void sound_stop(struct sound *s)
     bus_free(s->bus);
 }
 
-int sound_finished(struct sound *s)
+int sound_finished(const struct sound *s)
 {
     return !s->playing && s->frame == s->data->frames;
 }
 
-int sound_stopped(struct sound *s)
+int sound_stopped(const struct sound *s)
 {
-    return !s->playing && s->frame = 0;
+    return !s->playing && s->frame == 0;
 }
 
 struct music make_music(const char *mp3)
@@ -284,16 +291,11 @@ void mp3_fillbuf(struct sound *s, short *buf, int n)
 
 }
 
-struct soundstream soundstream_make()
-{
-    struct soundstream new;
-    new.buf = circbuf_init(sizeof(short), BUF_FRAMES*CHANNELS*2);
-    return new;
-}
+
 
 void soundstream_fillbuf(struct soundstream *s, short *buf, int n)
 {
-    int max = s->buf.write - s->buf.read;
+    int max = s->buf->write - s->buf->read;
     int lim = (max < n*CHANNELS) ? max : n*CHANNELS;
     for (int i = 0; i < lim; i++) {
         buf[i] = cbuf_shift(&s->buf);
diff --git a/source/engine/sound.h b/source/engine/sound.h
index 4e9ce2b..5e519bc 100755
--- a/source/engine/sound.h
+++ b/source/engine/sound.h
@@ -1,7 +1,8 @@
 #ifndef SOUND_H
 #define SOUND_H
 
-#include "circbuf.h"
+struct circbuf;
+struct SDL_AudioStream;
 
 struct Mix_Chunk {
     int i;
@@ -18,10 +19,15 @@ enum MUS {
 };
 
 struct soundstream {
-    struct circbuf buf;
+    struct circbuf *buf;
 };
 
-struct soundstream soundstream_make();
+struct soundconvstream {
+ //   SDL_AudioStream *srconv;
+    void *data;
+};
+
+struct soundstream *soundstream_make();
 
 struct sound {
     int loop;
@@ -42,14 +48,9 @@ struct wav {
     void *data;
 };
 
-struct soundstream {
-    SDL_AudioStream *srconv;
-    void *data;
 
-};
 
 struct music {
-
 };
 
 extern const char *audioDriver;
@@ -62,12 +63,12 @@ void sound_fillbuf(struct sound *s, short *buf, int n);
 
 struct wav make_sound(const char *wav);
 void wav_norm_gain(struct wav *w, double lv);
-struct sound play_sound(struct wav *wav);
+struct sound *play_sound(struct wav *wav);
 
-int sound_playing(struct sound *s);
-int sound_paused(struct sound *s);
-int sound_stopped(struct sound *s);
-int sound_finished(struct sound *s);
+int sound_playing(const struct sound *s);
+int sound_paused(const struct sound *s);
+int sound_stopped(const struct sound *s);
+int sound_finished(const struct sound *s);
 void sound_pause(struct sound *s);
 void sound_resume(struct sound *s);
 void sound_stop(struct sound *s);