diff --git a/spa/plugins/alsa/acp/acp.c b/spa/plugins/alsa/acp/acp.c
index ca7cb1a12..6518f8b1f 100644
--- a/spa/plugins/alsa/acp/acp.c
+++ b/spa/plugins/alsa/acp/acp.c
@@ -2025,7 +2025,7 @@ struct acp_card *acp_card_new(uint32_t index, const struct acp_dict *props)
 	impl->profile_set->ignore_dB = impl->ignore_dB;
 
 	pa_alsa_profile_set_probe(impl->profile_set, impl->ucm.mixers,
-			device_id,
+			index,
 			&impl->ucm.default_sample_spec,
 			impl->ucm.default_n_fragments,
 			impl->ucm.default_fragment_size_msec);
diff --git a/spa/plugins/alsa/acp/alsa-mixer.c b/spa/plugins/alsa/acp/alsa-mixer.c
index 299a78413..bd41e36ea 100644
--- a/spa/plugins/alsa/acp/alsa-mixer.c
+++ b/spa/plugins/alsa/acp/alsa-mixer.c
@@ -4467,7 +4467,7 @@ static void profile_set_set_availability_groups(pa_alsa_profile_set *ps) {
 
 static void mapping_paths_probe(pa_alsa_mapping *m, pa_alsa_profile *profile,
                                 pa_alsa_direction_t direction, pa_hashmap *used_paths,
-                                pa_hashmap *mixers) {
+                                pa_hashmap *mixers, uint32_t card_index) {
 
     pa_alsa_path *p;
     void *state;
@@ -4492,7 +4492,7 @@ static void mapping_paths_probe(pa_alsa_mapping *m, pa_alsa_profile *profile,
 
     pa_assert(pcm_handle);
 
-    mixer_handle = pa_alsa_open_mixer_for_pcm(mixers, pcm_handle, true);
+    mixer_handle = pa_alsa_open_mixer_for_pcm(mixers, pcm_handle, true, card_index);
     if (!mixer_handle) {
         /* Cannot open mixer, remove all entries */
         pa_hashmap_remove_all(ps->paths);
@@ -5106,7 +5106,7 @@ static void mapping_query_hw_device(pa_alsa_mapping *mapping, snd_pcm_t *pcm) {
 void pa_alsa_profile_set_probe(
         pa_alsa_profile_set *ps,
         pa_hashmap *mixers,
-        const char *dev_id,
+        uint32_t card_index,
         const pa_sample_spec *ss,
         unsigned default_n_fragments,
         unsigned default_fragment_size_msec) {
@@ -5119,6 +5119,9 @@ void pa_alsa_profile_set_probe(
     pa_hashmap *broken_inputs, *broken_outputs, *used_paths;
     pa_alsa_mapping *selected_fallback_input = NULL, *selected_fallback_output = NULL;
 
+    char dev_id[16];
+    snprintf(dev_id, sizeof(dev_id), "%d", card_index);
+
     pa_assert(ps);
     pa_assert(dev_id);
     pa_assert(ss);
@@ -5244,7 +5247,7 @@ void pa_alsa_profile_set_probe(
                     if (p->fallback_output && selected_fallback_output == NULL) {
                         selected_fallback_output = m;
                     }
-                    mapping_paths_probe(m, p, PA_ALSA_DIRECTION_OUTPUT, used_paths, mixers);
+                    mapping_paths_probe(m, p, PA_ALSA_DIRECTION_OUTPUT, used_paths, mixers, card_index);
                 }
 
         if (p->input_mappings)
@@ -5254,7 +5257,7 @@ void pa_alsa_profile_set_probe(
                     if (p->fallback_input && selected_fallback_input == NULL) {
                         selected_fallback_input = m;
                     }
-                    mapping_paths_probe(m, p, PA_ALSA_DIRECTION_INPUT, used_paths, mixers);
+                    mapping_paths_probe(m, p, PA_ALSA_DIRECTION_INPUT, used_paths, mixers, card_index);
                 }
     }
 
diff --git a/spa/plugins/alsa/acp/alsa-mixer.h b/spa/plugins/alsa/acp/alsa-mixer.h
index 75d4a03db..83c052067 100644
--- a/spa/plugins/alsa/acp/alsa-mixer.h
+++ b/spa/plugins/alsa/acp/alsa-mixer.h
@@ -431,7 +431,7 @@ void pa_alsa_mapping_free (pa_alsa_mapping *m);
 void pa_alsa_profile_free (pa_alsa_profile *p);
 
 pa_alsa_profile_set* pa_alsa_profile_set_new(const char *fname, const pa_channel_map *bonus);
-void pa_alsa_profile_set_probe(pa_alsa_profile_set *ps, pa_hashmap *mixers, const char *dev_id, const pa_sample_spec *ss, unsigned default_n_fragments, unsigned default_fragment_size_msec);
+void pa_alsa_profile_set_probe(pa_alsa_profile_set *ps, pa_hashmap *mixers, uint32_t card_index, const pa_sample_spec *ss, unsigned default_n_fragments, unsigned default_fragment_size_msec);
 void pa_alsa_profile_set_free(pa_alsa_profile_set *s);
 void pa_alsa_profile_set_dump(pa_alsa_profile_set *s);
 void pa_alsa_profile_set_drop_unsupported(pa_alsa_profile_set *s);
diff --git a/spa/plugins/alsa/acp/alsa-util.c b/spa/plugins/alsa/acp/alsa-util.c
index 52b63eb87..0a6da94f4 100644
--- a/spa/plugins/alsa/acp/alsa-util.c
+++ b/spa/plugins/alsa/acp/alsa-util.c
@@ -1923,16 +1923,19 @@ __close:
     return NULL;
 }
 
-snd_mixer_t *pa_alsa_open_mixer_for_pcm(pa_hashmap *mixers, snd_pcm_t *pcm, bool probe) {
+snd_mixer_t *pa_alsa_open_mixer_for_pcm(pa_hashmap *mixers, snd_pcm_t *pcm, bool probe, uint32_t fallback_index) {
     snd_pcm_info_t* info;
     snd_pcm_info_alloca(&info);
 
     pa_assert(pcm);
 
     if (snd_pcm_info(pcm, info) >= 0) {
-        int card_idx;
+        int card_idx = snd_pcm_info_get_card(info);
 
-        if ((card_idx = snd_pcm_info_get_card(info)) >= 0)
+        if (card_idx < 0)
+            card_idx = fallback_index;
+
+        if (card_idx >= 0)
             return pa_alsa_open_mixer(mixers, card_idx, probe);
     }
 
diff --git a/spa/plugins/alsa/acp/alsa-util.h b/spa/plugins/alsa/acp/alsa-util.h
index f8c8622b5..87e463c42 100644
--- a/spa/plugins/alsa/acp/alsa-util.h
+++ b/spa/plugins/alsa/acp/alsa-util.h
@@ -166,7 +166,7 @@ snd_mixer_elem_t *pa_alsa_mixer_find_pcm(snd_mixer_t *mixer, const char *name, u
 
 snd_mixer_t *pa_alsa_open_mixer(pa_hashmap *mixers, int alsa_card_index, bool probe);
 snd_mixer_t *pa_alsa_open_mixer_by_name(pa_hashmap *mixers, const char *dev, bool probe);
-snd_mixer_t *pa_alsa_open_mixer_for_pcm(pa_hashmap *mixers, snd_pcm_t *pcm, bool probe);
+snd_mixer_t *pa_alsa_open_mixer_for_pcm(pa_hashmap *mixers, snd_pcm_t *pcm, bool probe, uint32_t fallback_index);
 #if 0
 void pa_alsa_mixer_set_fdlist(pa_hashmap *mixers, snd_mixer_t *mixer, pa_mainloop_api *ml);
 #endif