diff --git a/src/audio.c b/src/audio.c
index 5b50069..6b7183a 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -74,14 +74,7 @@ int audio_destroy(audio_t *aud) {
     return 0;
 }
 
-/*
-int encLen = opus_encode_float(aud->opus_enc, (float *)input, frameCount, aud->opusBuf, aud->opusBufSz);
-    (void)encLen;
-    int frame_size = opus_decode_float(aud->opus_dec, aud->opusBuf, aud->opusBufSz, (float *)output, frameCount, 0);
-    (void)frame_size;
-*/
-
-int audio_read(audio_t *aud, uint8_t *output, size_t output_len) {
+int audio_read(audio_t *aud, unsigned char *output, int output_len) {
     PaError pa_err;
 
     if ((pa_err = Pa_ReadStream(aud->stream, aud->buffer, aud->buffer_size)) != paNoError) {
@@ -95,10 +88,10 @@ int audio_read(audio_t *aud, uint8_t *output, size_t output_len) {
         return -1;
     }
 
-    return 0;
+    return encodedLen;
 }
 
-int audio_write(audio_t *aud, const uint8_t *input, size_t input_len) {
+int audio_write(audio_t *aud, const unsigned char *input, int input_len) {
     PaError pa_err;
 
     int frame_size = opus_decode_float(aud->opus_dec, input, input_len, aud->buffer, aud->buffer_size, 0);
diff --git a/src/audio.h b/src/audio.h
index bc954c8..fa8e0ea 100644
--- a/src/audio.h
+++ b/src/audio.h
@@ -16,13 +16,13 @@ typedef struct audio_t {
     OpusDecoder *opus_dec;
 
     audio_sample_t *buffer;
-    size_t          buffer_size;
+    int             buffer_size;
 } audio_t;
 
 int audio_init(audio_t *aud, int channels, int sample_rate, int frame_size);
 int audio_destroy(audio_t *aud);
 
-int audio_read(audio_t *aud, uint8_t *output, size_t output_len);
-int audio_write(audio_t *aud, const uint8_t *input, size_t input_len);
+int audio_read(audio_t *aud, unsigned char *output, int output_len);
+int audio_write(audio_t *aud, const unsigned char *input, int input_len);
 
 #endif /* _AUDIO_H_ */
\ No newline at end of file