diff --git a/include/bluetooth/audio/vocs.h b/include/bluetooth/audio/vocs.h
index 3477d78b5e5..ea40c87cd26 100644
--- a/include/bluetooth/audio/vocs.h
+++ b/include/bluetooth/audio/vocs.h
@@ -43,8 +43,8 @@ extern "C" {
 /** @brief Opaque Volume Offset Control Service instance. */
 struct bt_vocs;
 
-/** @brief Structure for initializing a Volume Offset Control Service instance. */
-struct bt_vocs_init_param {
+/** @brief Structure for registering a Volume Offset Control Service instance. */
+struct bt_vocs_register_param {
 	/** Audio Location bitmask */
 	uint32_t location;
 
@@ -59,6 +59,9 @@ struct bt_vocs_init_param {
 
 	/** Boolean to set whether the description is writable by clients */
 	bool desc_writable;
+
+	/** Pointer to the callback structure. */
+	struct bt_vocs_cb *cb;
 };
 
 /** @brief Structure for discovering a Volume Offset Control Service instance. */
@@ -96,15 +99,15 @@ struct bt_vocs *bt_vocs_free_instance_get(void);
 void *bt_vocs_svc_decl_get(struct bt_vocs *vocs);
 
 /**
- * @brief Initialize the Volume Offset Control Service instance.
+ * @brief Register the Volume Offset Control Service instance.
  *
  * @param vocs      Volume Offset Control Service instance.
- * @param init      Volume Offset Control Service initialization structure.
- *                  May be NULL to use default values.
+ * @param param     Volume Offset Control Service register parameters.
  *
  * @return 0 if success, errno on failure.
  */
-int bt_vocs_init(struct bt_vocs *vocs, const struct bt_vocs_init_param *init);
+int bt_vocs_register(struct bt_vocs *vocs,
+		     const struct bt_vocs_register_param *param);
 
 /**
  * @brief Callback function for the offset state.
@@ -257,16 +260,6 @@ int bt_vocs_description_get(struct bt_conn *conn, struct bt_vocs *inst);
 int bt_vocs_description_set(struct bt_conn *conn, struct bt_vocs *inst,
 			    const char *description);
 
-/**
- * @brief Register callbacks for the Volume Offset Control Service.
- *
- * @param inst          Pointer to the Volume Offset Control Service instance.
- * @param cb            Pointer to the callback structure.
- *
- * @return 0 on success, GATT error value on fail.
- */
-int bt_vocs_cb_register(struct bt_vocs *inst, struct bt_vocs_cb *cb);
-
 /**
  * @brief Registers the callbacks for the Volume Offset Control Service client.
  *
diff --git a/subsys/bluetooth/audio/vocs.c b/subsys/bluetooth/audio/vocs.c
index 2bbc9bc0a2b..bb8e0d1bb0b 100644
--- a/subsys/bluetooth/audio/vocs.c
+++ b/subsys/bluetooth/audio/vocs.c
@@ -266,7 +266,8 @@ static void prepare_vocs_instances(void)
 	}
 }
 
-int bt_vocs_init(struct bt_vocs *vocs, const struct bt_vocs_init_param *init)
+int bt_vocs_register(struct bt_vocs *vocs,
+		     const struct bt_vocs_register_param *param)
 {
 	int err;
 	struct bt_gatt_attr *attr;
@@ -278,6 +279,11 @@ int bt_vocs_init(struct bt_vocs *vocs, const struct bt_vocs_init_param *init)
 		return -EINVAL;
 	}
 
+	CHECKIF(!param) {
+		BT_DBG("NULL params pointer");
+		return -EINVAL;
+	}
+
 	if (!instances_prepared) {
 		prepare_vocs_instances();
 		instances_prepared = true;
@@ -288,21 +294,22 @@ int bt_vocs_init(struct bt_vocs *vocs, const struct bt_vocs_init_param *init)
 		return -EALREADY;
 	}
 
-	CHECKIF(init->offset > BT_VOCS_MAX_OFFSET || init->offset < BT_VOCS_MIN_OFFSET) {
-		BT_DBG("Invalid offset %d", init->offset);
+	CHECKIF(param->offset > BT_VOCS_MAX_OFFSET || param->offset < BT_VOCS_MIN_OFFSET) {
+		BT_DBG("Invalid offset %d", param->offset);
 		return -EINVAL;
 	}
 
-	vocs->srv.location = init->location;
-	vocs->srv.state.offset = init->offset;
+	vocs->srv.location = param->location;
+	vocs->srv.state.offset = param->offset;
+	vocs->srv.cb = param->cb;
 
-	if (init->output_desc) {
-		strncpy(vocs->srv.output_desc, init->output_desc,
+	if (param->output_desc) {
+		strncpy(vocs->srv.output_desc, param->output_desc,
 			sizeof(vocs->srv.output_desc) - 1);
 		/* strncpy may not always null-terminate */
 		vocs->srv.output_desc[sizeof(vocs->srv.output_desc) - 1] = '\0';
 		if (IS_ENABLED(CONFIG_BT_DEBUG_VOCS) &&
-		    strcmp(vocs->srv.output_desc, init->output_desc)) {
+		    strcmp(vocs->srv.output_desc, param->output_desc)) {
 			BT_DBG("Output desc clipped to %s", log_strdup(vocs->srv.output_desc));
 		}
 	}
@@ -316,13 +323,13 @@ int bt_vocs_init(struct bt_vocs *vocs, const struct bt_vocs_init_param *init)
 	for (int i = 1; i < vocs->srv.service_p->attr_count; i++) {
 		attr = &vocs->srv.service_p->attrs[i];
 
-		if (init->location_writable && !bt_uuid_cmp(attr->uuid, BT_UUID_VOCS_LOCATION)) {
+		if (param->location_writable && !bt_uuid_cmp(attr->uuid, BT_UUID_VOCS_LOCATION)) {
 			/* Update attr and chrc to be writable */
 			chrc = vocs->srv.service_p->attrs[i - 1].user_data;
 			attr->write = write_location;
 			attr->perm |= BT_GATT_PERM_WRITE_ENCRYPT;
 			chrc->properties |= BT_GATT_CHRC_WRITE_WITHOUT_RESP;
-		} else if (init->desc_writable &&
+		} else if (param->desc_writable &&
 			   !bt_uuid_cmp(attr->uuid, BT_UUID_VOCS_DESCRIPTION)) {
 			/* Update attr and chrc to be writable */
 			chrc = vocs->srv.service_p->attrs[i - 1].user_data;
@@ -480,16 +487,4 @@ int bt_vocs_description_set(struct bt_conn *conn, struct bt_vocs *inst, const ch
 	return -ENOTSUP;
 }
 
-int bt_vocs_cb_register(struct bt_vocs *inst, struct bt_vocs_cb *cb)
-{
-	CHECKIF(!inst) {
-		BT_DBG("Null VOCS pointer");
-		return -EINVAL;
-	}
-
-	inst->srv.cb = cb;
-
-	return 0;
-}
-
 #endif /* CONFIG_BT_VOCS || CONFIG_BT_VOCS_CLIENT */