diff --git a/ap/lib/libtinyalsa/tinymix.c b/ap/lib/libtinyalsa/tinymix.c
new file mode 100644
index 0000000..a3c41a2
--- /dev/null
+++ b/ap/lib/libtinyalsa/tinymix.c
@@ -0,0 +1,316 @@
+/* tinymix.c
+**
+** Copyright 2011, The Android Open Source Project
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of The Android Open Source Project nor the names of
+**       its contributors may be used to endorse or promote products derived
+**       from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE
+** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+** DAMAGE.
+*/
+
+#include <tinyalsa/asoundlib.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+
+static void tinymix_list_controls(struct mixer *mixer);
+static void tinymix_detail_control(struct mixer *mixer, const char *control,
+                                   int print_all);
+static void tinymix_set_value(struct mixer *mixer, const char *control,
+                              char **values, unsigned int num_values);
+static void tinymix_print_enum(struct mixer_ctl *ctl, int print_all);
+
+int main(int argc, char **argv)
+{
+    struct mixer *mixer;
+    int card = 0;
+
+    if ((argc > 2) && (strcmp(argv[1], "-D") == 0)) {
+        argv++;
+        if (argv[1]) {
+            card = atoi(argv[1]);
+            argv++;
+            argc -= 2;
+        } else {
+            argc -= 1;
+        }
+    }
+
+    mixer = mixer_open(card);
+    if (!mixer) {
+        fprintf(stderr, "Failed to open mixer\n");
+        return EXIT_FAILURE;
+    }
+
+
+    if (argc == 1) {
+        printf("Mixer name: '%s'\n", mixer_get_name(mixer));
+        tinymix_list_controls(mixer);
+    } else if (argc == 2) {
+        tinymix_detail_control(mixer, argv[1], 1);
+    } else if (argc >= 3) {
+        tinymix_set_value(mixer, argv[1], &argv[2], argc - 2);
+    } else {
+        printf("Usage: tinymix [-D card] [control id] [value to set]\n");
+    }
+
+    mixer_close(mixer);
+
+    return 0;
+}
+
+static void tinymix_list_controls(struct mixer *mixer)
+{
+    struct mixer_ctl *ctl;
+    const char *name, *type;
+    unsigned int num_ctls, num_values;
+    unsigned int i;
+
+    num_ctls = mixer_get_num_ctls(mixer);
+
+    printf("Number of controls: %d\n", num_ctls);
+
+    printf("ctl\ttype\tnum\t%-40s value\n", "name");
+    for (i = 0; i < num_ctls; i++) {
+        ctl = mixer_get_ctl(mixer, i);
+
+        name = mixer_ctl_get_name(ctl);
+        type = mixer_ctl_get_type_string(ctl);
+        num_values = mixer_ctl_get_num_values(ctl);
+        printf("%d\t%s\t%d\t%-40s", i, type, num_values, name);
+        tinymix_detail_control(mixer, name, 0);
+    }
+}
+
+static void tinymix_print_enum(struct mixer_ctl *ctl, int print_all)
+{
+    unsigned int num_enums;
+    unsigned int i;
+    const char *string;
+
+    num_enums = mixer_ctl_get_num_enums(ctl);
+
+    for (i = 0; i < num_enums; i++) {
+        string = mixer_ctl_get_enum_string(ctl, i);
+        if (print_all)
+            printf("\t%s%s", mixer_ctl_get_value(ctl, 0) == (int)i ? ">" : "",
+                   string);
+        else if (mixer_ctl_get_value(ctl, 0) == (int)i)
+            printf(" %-s", string);
+    }
+}
+
+static void tinymix_detail_control(struct mixer *mixer, const char *control,
+                                   int print_all)
+{
+    struct mixer_ctl *ctl;
+    enum mixer_ctl_type type;
+    unsigned int num_values;
+    unsigned int i;
+    int min, max;
+    int ret;
+    char *buf = NULL;
+    size_t len;
+
+    if (isdigit(control[0]))
+        ctl = mixer_get_ctl(mixer, atoi(control));
+    else
+        ctl = mixer_get_ctl_by_name(mixer, control);
+
+    if (!ctl) {
+        fprintf(stderr, "Invalid mixer control\n");
+        return;
+    }
+
+    type = mixer_ctl_get_type(ctl);
+    num_values = mixer_ctl_get_num_values(ctl);
+
+    if (type == MIXER_CTL_TYPE_BYTE) {
+
+        buf = calloc(1, num_values);
+        if (buf == NULL) {
+            fprintf(stderr, "Failed to alloc mem for bytes %d\n", num_values);
+            return;
+        }
+
+        len = num_values;
+        ret = mixer_ctl_get_array(ctl, buf, len);
+        if (ret < 0) {
+            fprintf(stderr, "Failed to mixer_ctl_get_array\n");
+            free(buf);
+            return;
+        }
+    }
+
+    if (print_all)
+        printf("%s:", mixer_ctl_get_name(ctl));
+
+    for (i = 0; i < num_values; i++) {
+        switch (type)
+        {
+        case MIXER_CTL_TYPE_INT:
+            printf(" %d", mixer_ctl_get_value(ctl, i));
+            break;
+        case MIXER_CTL_TYPE_BOOL:
+            printf(" %s", mixer_ctl_get_value(ctl, i) ? "On" : "Off");
+            break;
+        case MIXER_CTL_TYPE_ENUM:
+            tinymix_print_enum(ctl, print_all);
+            break;
+        case MIXER_CTL_TYPE_BYTE:
+            printf("%02x", buf[i]);
+            break;
+        default:
+            printf(" unknown");
+            break;
+        };
+    }
+
+    if (print_all) {
+        if (type == MIXER_CTL_TYPE_INT) {
+            min = mixer_ctl_get_range_min(ctl);
+            max = mixer_ctl_get_range_max(ctl);
+            printf(" (range %d->%d)", min, max);
+        }
+    }
+
+    free(buf);
+
+    printf("\n");
+}
+
+static void tinymix_set_byte_ctl(struct mixer_ctl *ctl,
+    char **values, unsigned int num_values)
+{
+    int ret;
+    char *buf;
+    char *end;
+    unsigned int i;
+    long n;
+
+    buf = calloc(1, num_values);
+    if (buf == NULL) {
+        fprintf(stderr, "set_byte_ctl: Failed to alloc mem for bytes %d\n", num_values);
+        exit(EXIT_FAILURE);
+    }
+
+    for (i = 0; i < num_values; i++) {
+        errno = 0;
+        n = strtol(values[i], &end, 0);
+        if (*end) {
+            fprintf(stderr, "%s not an integer\n", values[i]);
+            goto fail;
+        }
+        if (errno) {
+            fprintf(stderr, "strtol: %s: %s\n", values[i],
+                strerror(errno));
+            goto fail;
+        }
+        if (n < 0 || n > 0xff) {
+            fprintf(stderr, "%s should be between [0, 0xff]\n",
+                values[i]);
+            goto fail;
+        }
+        buf[i] = n;
+    }
+
+    ret = mixer_ctl_set_array(ctl, buf, num_values);
+    if (ret < 0) {
+        fprintf(stderr, "Failed to set binary control\n");
+        goto fail;
+    }
+
+    free(buf);
+    return;
+
+fail:
+    free(buf);
+    exit(EXIT_FAILURE);
+}
+
+static void tinymix_set_value(struct mixer *mixer, const char *control,
+                              char **values, unsigned int num_values)
+{
+    struct mixer_ctl *ctl;
+    enum mixer_ctl_type type;
+    unsigned int num_ctl_values;
+    unsigned int i;
+
+    if (isdigit(control[0]))
+        ctl = mixer_get_ctl(mixer, atoi(control));
+    else
+        ctl = mixer_get_ctl_by_name(mixer, control);
+
+    if (!ctl) {
+        fprintf(stderr, "Invalid mixer control\n");
+        return;
+    }
+
+    type = mixer_ctl_get_type(ctl);
+    num_ctl_values = mixer_ctl_get_num_values(ctl);
+
+    if (type == MIXER_CTL_TYPE_BYTE) {
+        tinymix_set_byte_ctl(ctl, values, num_values);
+        return;
+    }
+
+    if (isdigit(values[0][0])) {
+        if (num_values == 1) {
+            /* Set all values the same */
+            int value = atoi(values[0]);
+
+            for (i = 0; i < num_ctl_values; i++) {
+                if (mixer_ctl_set_value(ctl, i, value)) {
+                    fprintf(stderr, "Error: invalid value\n");
+                    return;
+                }
+            }
+        } else {
+            /* Set multiple values */
+            if (num_values > num_ctl_values) {
+                fprintf(stderr,
+                        "Error: %d values given, but control only takes %d\n",
+                        num_values, num_ctl_values);
+                return;
+            }
+            for (i = 0; i < num_values; i++) {
+                if (mixer_ctl_set_value(ctl, i, atoi(values[i]))) {
+                    fprintf(stderr, "Error: invalid value for index %d\n", i);
+                    return;
+                }
+            }
+        }
+    } else {
+        if (type == MIXER_CTL_TYPE_ENUM) {
+            if (num_values != 1) {
+                fprintf(stderr, "Enclose strings in quotes and try again\n");
+                return;
+            }
+            if (mixer_ctl_set_enum_by_string(ctl, values[0]))
+                fprintf(stderr, "Error: invalid enum value\n");
+        } else {
+            fprintf(stderr, "Error: only enum types can be set with strings\n");
+        }
+    }
+}
+