7 files changed, 12 insertions, 0 deletions
diff --git a/libao2/ao_coreaudio.c b/libao2/ao_coreaudio.c
index 34374f4c9c..50e943e9ac 100644
--- a/libao2/ao_coreaudio.c
+++ b/libao2/ao_coreaudio.c
@@ -450,6 +450,8 @@ int device_id, display_help = 0;
     ao->b_revert = 0;
     ao->b_changed_mixing = 0;
 
+    global_ao->no_persistent_volume = true;
+
     if (device_id == 0) {
         /* Find the ID of the default Device. */
         err = GetAudioProperty(kAudioObjectSystemObject,
diff --git a/libao2/ao_dsound.c b/libao2/ao_dsound.c
index 63cc02e92c..b33f2949fd 100644
--- a/libao2/ao_dsound.c
+++ b/libao2/ao_dsound.c
@@ -420,6 +420,8 @@ static int init(int rate, int channels, int format, int flags)
     int res;
 	if (!InitDirectSound()) return 0;
 
+        global_ao->no_persistent_volume = true;
+
 	// ok, now create the buffers
 	WAVEFORMATEXTENSIBLE wformat;
 	DSBUFFERDESC dsbpridesc;
diff --git a/libao2/ao_esd.c b/libao2/ao_esd.c
index d5423991bd..e7c6701aa0 100644
--- a/libao2/ao_esd.c
+++ b/libao2/ao_esd.c
@@ -164,6 +164,8 @@ static int init(int rate_hz, int channels, int format, int flags)
     float lag_seconds, lag_net = 0., lag_serv;
     struct timeval proto_start, proto_end;
 
+    global_ao->no_persistent_volume = true;
+
     if (esd_fd < 0) {
 	esd_fd = esd_open_sound(server);
 	if (esd_fd < 0) {
diff --git a/libao2/ao_nas.c b/libao2/ao_nas.c
index fb49c5e60e..d3274df9a5 100644
--- a/libao2/ao_nas.c
+++ b/libao2/ao_nas.c
@@ -424,6 +424,8 @@ static int init(int rate,int channels,int format,int flags)
 
 	(void)flags; /* shut up 'unused parameter' warning */
 
+	global_ao->no_persistent_volume = true;
+
 	nas_data=malloc(sizeof(struct ao_nas_data));
 	memset(nas_data, 0, sizeof(struct ao_nas_data));
 
diff --git a/libao2/ao_openal.c b/libao2/ao_openal.c
index e425b5769c..490aac0eb8 100644
--- a/libao2/ao_openal.c
+++ b/libao2/ao_openal.c
@@ -108,6 +108,7 @@ static int init(int rate, int channels, int format, int flags) {
   const opt_t subopts[] = {
     {NULL}
   };
+  global_ao->no_persistent_volume = true;
   if (subopt_parse(ao_subdevice, subopts) != 0) {
     print_help();
     return 0;
diff --git a/libao2/ao_sdl.c b/libao2/ao_sdl.c
index e9ae7298d5..6ff8b83cb3 100644
--- a/libao2/ao_sdl.c
+++ b/libao2/ao_sdl.c
@@ -135,6 +135,8 @@ static int init(int rate,int channels,int format,int flags){
 	/* SDL Audio Specifications */
 	SDL_AudioSpec aspec, obtained;
 
+        global_ao->no_persistent_volume = true;
+
 	/* Allocate ring-buffer memory */
 	buffer = av_fifo_alloc(BUFFSIZE);
 
diff --git a/libao2/audio_out.h b/libao2/audio_out.h
index 2e59c42aa4..5a9d52def3 100644
--- a/libao2/audio_out.h
+++ b/libao2/audio_out.h
@@ -99,6 +99,7 @@ struct ao {
     int buffer_playable_size;
     bool initialized;
     bool untimed;
+    bool no_persistent_volume;
     const struct ao_driver *driver;
     void *priv;
     struct MPOpts *opts;