diff --git a/audio/alsaaudio.c b/audio/alsaaudio.c
index 3daa7c8f8f..e9e3a4819c 100644
--- a/audio/alsaaudio.c
+++ b/audio/alsaaudio.c
@@ -270,11 +270,6 @@ static int alsa_poll_in (HWVoiceIn *hw)
     return alsa_poll_helper (alsa->handle, &alsa->pollhlp, POLLIN);
 }
 
-static int alsa_write (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
 static snd_pcm_format_t aud_to_alsafmt (AudioFormat fmt, int endianness)
 {
     switch (fmt) {
@@ -988,11 +983,6 @@ static int alsa_run_in (HWVoiceIn *hw)
     return read_samples;
 }
 
-static int alsa_read (SWVoiceIn *sw, void *buf, int size)
-{
-    return audio_pcm_sw_read (sw, buf, size);
-}
-
 static int alsa_ctl_in (HWVoiceIn *hw, int cmd, ...)
 {
     ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw;
@@ -1076,13 +1066,11 @@ static struct audio_pcm_ops alsa_pcm_ops = {
     .init_out = alsa_init_out,
     .fini_out = alsa_fini_out,
     .run_out  = alsa_run_out,
-    .write    = alsa_write,
     .ctl_out  = alsa_ctl_out,
 
     .init_in  = alsa_init_in,
     .fini_in  = alsa_fini_in,
     .run_in   = alsa_run_in,
-    .read     = alsa_read,
     .ctl_in   = alsa_ctl_in,
 };
 
diff --git a/audio/audio.c b/audio/audio.c
index bc9ac25c08..0e8c605472 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -596,7 +596,7 @@ static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
     }
 }
 
-int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
+static int audio_pcm_sw_read(SWVoiceIn *sw, void *buf, int size)
 {
     HWVoiceIn *hw = sw->hw;
     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
@@ -698,7 +698,7 @@ static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 /*
  * Soft voice (playback)
  */
-int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
+static int audio_pcm_sw_write(SWVoiceOut *sw, void *buf, int size)
 {
     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
     int ret = 0, pos = 0, total = 0;
@@ -856,7 +856,7 @@ int AUD_write (SWVoiceOut *sw, void *buf, int size)
         return 0;
     }
 
-    return sw->hw->pcm_ops->write(sw, buf, size);
+    return audio_pcm_sw_write(sw, buf, size);
 }
 
 int AUD_read (SWVoiceIn *sw, void *buf, int size)
@@ -871,7 +871,7 @@ int AUD_read (SWVoiceIn *sw, void *buf, int size)
         return 0;
     }
 
-    return sw->hw->pcm_ops->read(sw, buf, size);
+    return audio_pcm_sw_read(sw, buf, size);
 }
 
 int AUD_get_buffer_size_out (SWVoiceOut *sw)
diff --git a/audio/audio_int.h b/audio/audio_int.h
index 7e00c1332e..003b7ab8cc 100644
--- a/audio/audio_int.h
+++ b/audio/audio_int.h
@@ -150,13 +150,11 @@ struct audio_pcm_ops {
     int  (*init_out)(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque);
     void (*fini_out)(HWVoiceOut *hw);
     int  (*run_out) (HWVoiceOut *hw, int live);
-    int  (*write)   (SWVoiceOut *sw, void *buf, int size);
     int  (*ctl_out) (HWVoiceOut *hw, int cmd, ...);
 
     int  (*init_in) (HWVoiceIn *hw, struct audsettings *as, void *drv_opaque);
     void (*fini_in) (HWVoiceIn *hw);
     int  (*run_in)  (HWVoiceIn *hw);
-    int  (*read)    (SWVoiceIn *sw, void *buf, int size);
     int  (*ctl_in)  (HWVoiceIn *hw, int cmd, ...);
 };
 
@@ -210,11 +208,8 @@ audio_driver *audio_driver_lookup(const char *name);
 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as);
 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len);
 
-int  audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int len);
 int  audio_pcm_hw_get_live_in (HWVoiceIn *hw);
 
-int  audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int len);
-
 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
                            int live, int pending);
 
diff --git a/audio/coreaudio.c b/audio/coreaudio.c
index f0ab4014a8..091fe84a34 100644
--- a/audio/coreaudio.c
+++ b/audio/coreaudio.c
@@ -489,11 +489,6 @@ static OSStatus audioDeviceIOProc(
     return 0;
 }
 
-static int coreaudio_write (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
 static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
                               void *drv_opaque)
 {
@@ -692,7 +687,6 @@ static struct audio_pcm_ops coreaudio_pcm_ops = {
     .init_out = coreaudio_init_out,
     .fini_out = coreaudio_fini_out,
     .run_out  = coreaudio_run_out,
-    .write    = coreaudio_write,
     .ctl_out  = coreaudio_ctl_out
 };
 
diff --git a/audio/dsoundaudio.c b/audio/dsoundaudio.c
index 07260f881e..11594c3095 100644
--- a/audio/dsoundaudio.c
+++ b/audio/dsoundaudio.c
@@ -454,11 +454,6 @@ static int dsound_ctl_out (HWVoiceOut *hw, int cmd, ...)
     return 0;
 }
 
-static int dsound_write (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
 static int dsound_run_out (HWVoiceOut *hw, int live)
 {
     int err;
@@ -645,11 +640,6 @@ static int dsound_ctl_in (HWVoiceIn *hw, int cmd, ...)
     return 0;
 }
 
-static int dsound_read (SWVoiceIn *sw, void *buf, int len)
-{
-    return audio_pcm_sw_read (sw, buf, len);
-}
-
 static int dsound_run_in (HWVoiceIn *hw)
 {
     int err;
@@ -856,13 +846,11 @@ static struct audio_pcm_ops dsound_pcm_ops = {
     .init_out = dsound_init_out,
     .fini_out = dsound_fini_out,
     .run_out  = dsound_run_out,
-    .write    = dsound_write,
     .ctl_out  = dsound_ctl_out,
 
     .init_in  = dsound_init_in,
     .fini_in  = dsound_fini_in,
     .run_in   = dsound_run_in,
-    .read     = dsound_read,
     .ctl_in   = dsound_ctl_in
 };
 
diff --git a/audio/noaudio.c b/audio/noaudio.c
index 14a0e4ab29..cbb02d9e49 100644
--- a/audio/noaudio.c
+++ b/audio/noaudio.c
@@ -61,11 +61,6 @@ static int no_run_out (HWVoiceOut *hw, int live)
     return decr;
 }
 
-static int no_write (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write(sw, buf, len);
-}
-
 static int no_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque)
 {
     audio_pcm_init_info (&hw->info, as);
@@ -118,18 +113,6 @@ static int no_run_in (HWVoiceIn *hw)
     return samples;
 }
 
-static int no_read (SWVoiceIn *sw, void *buf, int size)
-{
-    /* use custom code here instead of audio_pcm_sw_read() to avoid
-     * useless resampling/mixing */
-    int samples = size >> sw->info.shift;
-    int total = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
-    int to_clear = MIN (samples, total);
-    sw->total_hw_samples_acquired += total;
-    audio_pcm_info_clear_buf (&sw->info, buf, to_clear);
-    return to_clear << sw->info.shift;
-}
-
 static int no_ctl_in (HWVoiceIn *hw, int cmd, ...)
 {
     (void) hw;
@@ -151,13 +134,11 @@ static struct audio_pcm_ops no_pcm_ops = {
     .init_out = no_init_out,
     .fini_out = no_fini_out,
     .run_out  = no_run_out,
-    .write    = no_write,
     .ctl_out  = no_ctl_out,
 
     .init_in  = no_init_in,
     .fini_in  = no_fini_in,
     .run_in   = no_run_in,
-    .read     = no_read,
     .ctl_in   = no_ctl_in
 };
 
diff --git a/audio/ossaudio.c b/audio/ossaudio.c
index 456fba7480..b99edbec17 100644
--- a/audio/ossaudio.c
+++ b/audio/ossaudio.c
@@ -134,11 +134,6 @@ static void oss_poll_in (HWVoiceIn *hw)
     qemu_set_fd_handler(oss->fd, oss_helper_poll_in, NULL, hw->s);
 }
 
-static int oss_write (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
 static int aud_to_ossfmt (AudioFormat fmt, int endianness)
 {
     switch (fmt) {
@@ -788,11 +783,6 @@ static int oss_run_in (HWVoiceIn *hw)
     return read_samples;
 }
 
-static int oss_read (SWVoiceIn *sw, void *buf, int size)
-{
-    return audio_pcm_sw_read (sw, buf, size);
-}
-
 static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
 {
     OSSVoiceIn *oss = (OSSVoiceIn *) hw;
@@ -855,13 +845,11 @@ static struct audio_pcm_ops oss_pcm_ops = {
     .init_out = oss_init_out,
     .fini_out = oss_fini_out,
     .run_out  = oss_run_out,
-    .write    = oss_write,
     .ctl_out  = oss_ctl_out,
 
     .init_in  = oss_init_in,
     .fini_in  = oss_fini_in,
     .run_in   = oss_run_in,
-    .read     = oss_read,
     .ctl_in   = oss_ctl_in
 };
 
diff --git a/audio/paaudio.c b/audio/paaudio.c
index c8ae1a6eca..efb72ced30 100644
--- a/audio/paaudio.c
+++ b/audio/paaudio.c
@@ -295,11 +295,6 @@ static int qpa_run_out (HWVoiceOut *hw, int live)
     return decr;
 }
 
-static int qpa_write (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
 /* capture */
 static void *qpa_thread_in (void *arg)
 {
@@ -388,11 +383,6 @@ static int qpa_run_in (HWVoiceIn *hw)
     return incr;
 }
 
-static int qpa_read (SWVoiceIn *sw, void *buf, int len)
-{
-    return audio_pcm_sw_read (sw, buf, len);
-}
-
 static pa_sample_format_t audfmt_to_pa (AudioFormat afmt, int endianness)
 {
     int format;
@@ -1016,13 +1006,11 @@ static struct audio_pcm_ops qpa_pcm_ops = {
     .init_out = qpa_init_out,
     .fini_out = qpa_fini_out,
     .run_out  = qpa_run_out,
-    .write    = qpa_write,
     .ctl_out  = qpa_ctl_out,
 
     .init_in  = qpa_init_in,
     .fini_in  = qpa_fini_in,
     .run_in   = qpa_run_in,
-    .read     = qpa_read,
     .ctl_in   = qpa_ctl_in
 };
 
diff --git a/audio/sdlaudio.c b/audio/sdlaudio.c
index 42f7614124..c7fd487e0e 100644
--- a/audio/sdlaudio.c
+++ b/audio/sdlaudio.c
@@ -217,11 +217,6 @@ static void sdl_callback (void *opaque, Uint8 *buf, int len)
     }
 }
 
-static int sdl_write_out (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
 static int sdl_run_out (HWVoiceOut *hw, int live)
 {
     int decr;
@@ -342,7 +337,6 @@ static struct audio_pcm_ops sdl_pcm_ops = {
     .init_out = sdl_init_out,
     .fini_out = sdl_fini_out,
     .run_out  = sdl_run_out,
-    .write    = sdl_write_out,
     .ctl_out  = sdl_ctl_out,
 };
 
diff --git a/audio/spiceaudio.c b/audio/spiceaudio.c
index 5672e12dc3..ab69521ef9 100644
--- a/audio/spiceaudio.c
+++ b/audio/spiceaudio.c
@@ -192,11 +192,6 @@ static int line_out_run (HWVoiceOut *hw, int live)
     return decr;
 }
 
-static int line_out_write (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
 {
     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
@@ -325,11 +320,6 @@ static int line_in_run (HWVoiceIn *hw)
     return num_samples;
 }
 
-static int line_in_read (SWVoiceIn *sw, void *buf, int size)
-{
-    return audio_pcm_sw_read (sw, buf, size);
-}
-
 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
 {
     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
@@ -377,13 +367,11 @@ static struct audio_pcm_ops audio_callbacks = {
     .init_out = line_out_init,
     .fini_out = line_out_fini,
     .run_out  = line_out_run,
-    .write    = line_out_write,
     .ctl_out  = line_out_ctl,
 
     .init_in  = line_in_init,
     .fini_in  = line_in_fini,
     .run_in   = line_in_run,
-    .read     = line_in_read,
     .ctl_in   = line_in_ctl,
 };
 
diff --git a/audio/wavaudio.c b/audio/wavaudio.c
index bbf3f3b346..17ab921cef 100644
--- a/audio/wavaudio.c
+++ b/audio/wavaudio.c
@@ -84,11 +84,6 @@ static int wav_run_out (HWVoiceOut *hw, int live)
     return decr;
 }
 
-static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
-{
-    return audio_pcm_sw_write (sw, buf, len);
-}
-
 /* VICE code: Store number as little endian. */
 static void le_store (uint8_t *buf, uint32_t val, int len)
 {
@@ -240,7 +235,6 @@ static struct audio_pcm_ops wav_pcm_ops = {
     .init_out = wav_init_out,
     .fini_out = wav_fini_out,
     .run_out  = wav_run_out,
-    .write    = wav_write_out,
     .ctl_out  = wav_ctl_out,
 };