diff --git a/dsp.c b/dsp.c
index d2ada44..72d49aa 100644
--- a/dsp.c
+++ b/dsp.c
@@ -29,7 +29,6 @@ JSC_CCALL(dsp_mix_blobs,
   JSValue first_blob = JS_GetPropertyNumber(js, blobs_arr, 0);
   size_t out_bytes;
   float *first_data = (float*)js_get_blob_data(js, &out_bytes, first_blob);
-  JS_FreeValue(js, first_blob);
   if (first_data == (void*)-1) return JS_EXCEPTION;
   if (out_bytes == 0) return js_new_blob_stoned_copy(js, NULL, 0);
 
@@ -43,16 +42,13 @@ JSC_CCALL(dsp_mix_blobs,
 
     size_t blob_len;
     float *blob_data = (float*)js_get_blob_data(js, &blob_len, blob_val);
-    JS_FreeValue(js, blob_val);
     if (blob_data == (void*)-1) {
-      JS_FreeValue(js, vol_val);
       free(mix_buf);
       return JS_EXCEPTION;
     }
 
     double vol = 1.0;
     JS_ToFloat64(js, &vol, vol_val);
-    JS_FreeValue(js, vol_val);
 
     // Mix samples (use min length to avoid overrun)
     size_t samples = blob_len / sizeof(float);
@@ -87,8 +83,6 @@ JSC_CCALL(dsp_lpf,
   JSValue channels_val = JS_GetPropertyStr(js, argv[1], "channels");
   if (!JS_IsNull(cutoff_val)) JS_ToFloat64(js, &cutoff, cutoff_val);
   if (!JS_IsNull(channels_val)) JS_ToInt32(js, &channels, channels_val);
-  JS_FreeValue(js, cutoff_val);
-  JS_FreeValue(js, channels_val);
 
   if (cutoff < 0.0) cutoff = 0.0;
   if (cutoff > 1.0) cutoff = 1.0;