diff --git a/tools/chatgui-android/app/src/main/cpp/CMakeLists.txt b/tools/chatgui-android/app/src/main/cpp/CMakeLists.txt
index 49f0627f..3d7f3b8c 100644
--- a/tools/chatgui-android/app/src/main/cpp/CMakeLists.txt
+++ b/tools/chatgui-android/app/src/main/cpp/CMakeLists.txt
@@ -76,6 +76,7 @@ add_library(utun SHARED
     ${JNI_DIR}/android_jni_bridge.c
     ${JNI_DIR}/android_stream_jni.c
     ${JNI_DIR}/android_call_video_jni.c
+    ${JNI_DIR}/android_call_output_jni.c
     ${JNI_DIR}/android_udp_log.c
     $<TARGET_OBJECTS:utun_core>
 )
@@ -87,4 +88,4 @@ target_compile_definitions(utun PRIVATE ${UTUN_DEFINES} __ANDROID__)
 set_target_properties(utun PROPERTIES C_STANDARD 99 C_STANDARD_REQUIRED ON)
 
 find_library(log-lib log)
-target_link_libraries(utun ${log-lib} openssl_crypto utun_voice onnxruntime)
+target_link_libraries(utun ${log-lib} openssl_crypto utun_voice onnxruntime aaudio dl)
diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallAudioOutput.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallAudioOutput.kt
new file mode 100644
index 00000000..69d66f4d
--- /dev/null
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallAudioOutput.kt
@@ -0,0 +1,104 @@
+package com.utun.chat.data
+
+import android.media.AudioAttributes
+import android.media.AudioDeviceInfo
+import android.media.AudioFormat
+import android.media.AudioManager
+import android.media.AudioRouting
+import android.media.AudioTimestamp
+import android.media.AudioTrack
+import android.os.Build
+import android.os.Handler
+
+/** Один выход без промежуточной PCM-очереди. I/O и close сериализованы; владелец — playback worker. */
+internal class CallAudioOutput private constructor(
+    val track: AudioTrack?, private var handle: Long, private val manager: AudioManager
+) {
+    val fast = handle != 0L
+    val name = if (fast) "AAudio" else "AudioTrack"
+    private val sample = LongArray(10)
+    private var accepted = 0L
+    private var closed = false
+    val playState: Int get() = track?.playState ?: if (closed) AudioTrack.PLAYSTATE_STOPPED else AudioTrack.PLAYSTATE_PLAYING
+    val bufferSizeInFrames: Int get() = track?.bufferSizeInFrames ?: sample[4].toInt()
+    val bufferCapacityInFrames: Int get() = track?.bufferCapacityInFrames ?: sample[5].toInt()
+    val underrunCount: Int get() = track?.underrunCount ?: sample[3].toInt()
+    val performanceMode: Int get() = track?.performanceMode ?: AudioTrack.PERFORMANCE_MODE_LOW_LATENCY
+    val startThresholdInFrames: Int get() = if (track != null && Build.VERSION.SDK_INT >= 31) track.startThresholdInFrames else bufferSizeInFrames
+    val routedDevice: AudioDeviceInfo? get() = track?.routedDevice ?:
+        manager.getDevices(AudioManager.GET_DEVICES_OUTPUTS).firstOrNull { it.id.toLong() == sample[6] }
+
+    @Synchronized fun play() { check(!closed); track?.play() }
+    @Synchronized fun pause() { if (!closed) track?.pause() }
+    @Synchronized fun write(pcm: ShortArray, offset: Int, count: Int): Int {
+        check(!closed)
+        val n = track?.write(pcm, offset, count, AudioTrack.WRITE_NON_BLOCKING) ?: CallOutputNative.write(handle, pcm, offset, count)
+        if (n > 0) accepted += n
+        return n
+    }
+    val playbackHeadPosition: Int @Synchronized get() = track?.playbackHeadPosition ?:
+        CallOutputNative.head(handle).coerceIn(0, accepted).toInt()
+
+    @Synchronized fun getTimestamp(stamp: AudioTimestamp): Boolean {
+        if (closed) return false
+        track?.let { return it.getTimestamp(stamp) }
+        CallOutputNative.sample(handle, sample)
+        if (sample[1] < 0 || sample[2] < 0) return false
+        stamp.framePosition = sample[1]; stamp.nanoTime = sample[2]
+        return true
+    }
+    @Synchronized fun setBufferSizeInFrames(frames: Int): Int {
+        check(!closed)
+        track?.let { return it.setBufferSizeInFrames(frames) }
+        val actual = CallOutputNative.buffer(handle, frames)
+        CallOutputNative.sample(handle, sample)
+        return actual
+    }
+    @Synchronized fun setStartThresholdInFrames(frames: Int): Int =
+        if (track != null && Build.VERSION.SDK_INT >= 31) track.setStartThresholdInFrames(frames) else frames
+    @Synchronized fun setPreferredDevice(device: AudioDeviceInfo?): Boolean = track?.setPreferredDevice(device) ?: true
+    fun addOnRoutingChangedListener(listener: AudioRouting.OnRoutingChangedListener, handler: Handler) {
+        track?.addOnRoutingChangedListener(listener, handler)
+    }
+    fun removeOnRoutingChangedListener(listener: AudioRouting.OnRoutingChangedListener) {
+        track?.removeOnRoutingChangedListener(listener)
+    }
+    @Synchronized fun release() {
+        if (closed) return
+        closed = true
+        if (handle != 0L) { CallOutputNative.close(handle); handle = 0 }
+        track?.release()
+    }
+
+    companion object {
+        fun open(manager: AudioManager, deviceId: Int, tryFast: Boolean): CallAudioOutput {
+            if (tryFast && Build.VERSION.SDK_INT >= 31) {
+                val handle = CallOutputNative.open(deviceId)
+                if (handle != 0L) return CallAudioOutput(null, handle, manager).also { CallOutputNative.sample(handle, it.sample) }
+            }
+            val min = AudioTrack.getMinBufferSize(48000, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT)
+            check(min > 0) { "AudioTrack minimum=$min" }
+            val track = AudioTrack.Builder()
+                .setAudioAttributes(AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION)
+                    .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH).build())
+                .setAudioFormat(AudioFormat.Builder().setSampleRate(48000).setEncoding(AudioFormat.ENCODING_PCM_16BIT)
+                    .setChannelMask(AudioFormat.CHANNEL_OUT_MONO).build())
+                .setBufferSizeInBytes((min * 2).coerceAtLeast(3840)).setTransferMode(AudioTrack.MODE_STREAM)
+                .setPerformanceMode(AudioTrack.PERFORMANCE_MODE_LOW_LATENCY).build()
+            if (track.state != AudioTrack.STATE_INITIALIZED) { track.release(); error("AudioTrack not initialized") }
+            LogManager.addLog("INFO", "CallAudio", "output fallback=AudioTrack device=$deviceId tryFast=$tryFast")
+            return CallAudioOutput(track, 0, manager)
+        }
+    }
+}
+
+internal object CallOutputNative {
+    init { System.loadLibrary("utun") }
+    external fun open(deviceId: Int): Long
+    external fun write(handle: Long, pcm: ShortArray, offset: Int, count: Int): Int
+    external fun head(handle: Long): Long
+    external fun sample(handle: Long, out: LongArray)
+    external fun buffer(handle: Long, frames: Int): Int
+    external fun close(handle: Long)
+    external fun suspendClock(id: Long, epoch: Long)
+}
diff --git a/tools/chatgui-android/jni_bridge/android_call_output_jni.c b/tools/chatgui-android/jni_bridge/android_call_output_jni.c
new file mode 100644
index 00000000..cabb5839
--- /dev/null
+++ b/tools/chatgui-android/jni_bridge/android_call_output_jni.c
@@ -0,0 +1,159 @@
+/* AAudio I/O без дополнительной PCM-очереди. Kotlin сериализует операции одного handle.
+ * write передаёт по аппаратному периоду: blocking pacing AAudio держит заданный запас,
+ * NON_BLOCKING способен заполнить всю ёмкость MMAP независимо от рабочего bufferSize. */
+#include <aaudio/AAudio.h>
+#include <jni.h>
+#include <dlfcn.h>
+#include <stdint.h>
+#include <time.h>
+#include "debug_config.h"
+#include "mem.h"
+#include "call/call_audio.h"
+
+struct call_output {
+    AAudioStream* stream;
+    int burst;
+    int error;
+};
+
+static int64_t monotonic_ns(void) {
+    struct timespec now;
+    clock_gettime(CLOCK_MONOTONIC, &now);
+    return (int64_t)now.tv_sec * 1000000000 + now.tv_nsec;
+}
+
+static void output_error(const char* operation, int result) {
+    DEBUG_WARN(DEBUG_CATEGORY_CALL, "AAudio %s result=%d reason=%s", operation, result, AAudio_convertResultToText(result));
+}
+
+JNIEXPORT jlong JNICALL Java_com_utun_chat_data_CallOutputNative_open(JNIEnv* env, jobject self, jint device) {
+    (void)env; (void)self;
+    /* Речевые атрибуты появились в API 28; libutun загружается также на API 26. */
+    void (*set_usage)(AAudioStreamBuilder*, aaudio_usage_t) = dlsym(RTLD_DEFAULT, "AAudioStreamBuilder_setUsage");
+    void (*set_content)(AAudioStreamBuilder*, aaudio_content_type_t) = dlsym(RTLD_DEFAULT, "AAudioStreamBuilder_setContentType");
+    if (!set_usage || !set_content) {
+        DEBUG_INFO(DEBUG_CATEGORY_CALL, "AAudio unavailable: voice attributes missing"); return 0;
+    }
+    AAudioStreamBuilder* builder = NULL;
+    int result = AAudio_createStreamBuilder(&builder);
+    if (result < 0) { output_error("builder", result); return 0; }
+    AAudioStreamBuilder_setDirection(builder, AAUDIO_DIRECTION_OUTPUT);
+    AAudioStreamBuilder_setSampleRate(builder, 48000);
+    AAudioStreamBuilder_setChannelCount(builder, 1);
+    AAudioStreamBuilder_setFormat(builder, AAUDIO_FORMAT_PCM_I16);
+    AAudioStreamBuilder_setPerformanceMode(builder, AAUDIO_PERFORMANCE_MODE_LOW_LATENCY);
+    AAudioStreamBuilder_setSharingMode(builder, AAUDIO_SHARING_MODE_EXCLUSIVE);
+    if (device > 0) AAudioStreamBuilder_setDeviceId(builder, device);
+    set_usage(builder, AAUDIO_USAGE_VOICE_COMMUNICATION);
+    set_content(builder, AAUDIO_CONTENT_TYPE_SPEECH);
+    AAudioStream* stream = NULL;
+    result = AAudioStreamBuilder_openStream(builder, &stream);
+    int deleted = AAudioStreamBuilder_delete(builder);
+    if (deleted < 0) output_error("builder delete", deleted);
+    if (result < 0) { output_error("open", result); return 0; }
+    int burst = AAudioStream_getFramesPerBurst(stream);
+    int performance = AAudioStream_getPerformanceMode(stream);
+    bool (*is_mmap)(AAudioStream*) = dlsym(RTLD_DEFAULT, "AAudioStream_isMMapUsed");
+    int accepted = performance == AAUDIO_PERFORMANCE_MODE_LOW_LATENCY && burst > 0 && burst <= 480 &&
+        AAudioStream_getSampleRate(stream) == 48000 && AAudioStream_getChannelCount(stream) == 1 &&
+        AAudioStream_getFormat(stream) == AAUDIO_FORMAT_PCM_I16 &&
+        (device <= 0 || AAudioStream_getDeviceId(stream) == device);
+    DEBUG_INFO(DEBUG_CATEGORY_CALL, "AAudio candidate accepted=%d device=%d requested=%d rate=%d channels=%d "
+        "performance=%d sharing=%d mmap=%d burst=%d capacity=%d", accepted, AAudioStream_getDeviceId(stream), device,
+        AAudioStream_getSampleRate(stream), AAudioStream_getChannelCount(stream), performance,
+        AAudioStream_getSharingMode(stream), is_mmap ? is_mmap(stream) : -1, burst, AAudioStream_getBufferCapacityInFrames(stream));
+    if (accepted) {
+        result = AAudioStream_setBufferSizeInFrames(stream, 960);
+        if (result <= 0) { output_error("buffer", result); accepted = 0; }
+    }
+    if (accepted) {
+        result = AAudioStream_requestStart(stream);
+        if (result < 0) { output_error("start", result); accepted = 0; }
+    }
+    if (!accepted) {
+        result = AAudioStream_close(stream);
+        if (result < 0) output_error("close rejected", result);
+        return 0;
+    }
+    struct call_output* output = u_calloc(1, sizeof(*output));
+    if (!output) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CALL, "AAudio allocation failed");
+        result = AAudioStream_close(stream);
+        if (result < 0) output_error("close allocation failure", result);
+        return 0;
+    }
+    output->stream = stream; output->burst = burst;
+    return (jlong)(intptr_t)output;
+}
+
+JNIEXPORT jint JNICALL Java_com_utun_chat_data_CallOutputNative_write(
+    JNIEnv* env, jobject self, jlong handle, jshortArray input, jint offset, jint count) {
+    (void)self;
+    struct call_output* output = (struct call_output*)(intptr_t)handle;
+    if (!output || !input || offset < 0 || count <= 0 || count > 960 || offset > (*env)->GetArrayLength(env, input) - count) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CALL, "AAudio invalid write offset=%d count=%d", offset, count); return AAUDIO_ERROR_ILLEGAL_ARGUMENT;
+    }
+    if (output->error) return output->error;
+    int16_t pcm[960];
+    (*env)->GetShortArrayRegion(env, input, offset, count, pcm);
+    if ((*env)->ExceptionCheck(env)) { DEBUG_ERROR(DEBUG_CATEGORY_CALL, "AAudio JNI PCM copy failed"); return AAUDIO_ERROR_INTERNAL; }
+    int accepted = 0;
+    int64_t deadline = monotonic_ns() + 100000000;
+    while (accepted < count) {
+        int64_t timeout = deadline - monotonic_ns();
+        if (timeout <= 0) break;
+        int n = count - accepted < output->burst ? count - accepted : output->burst;
+        int result = AAudioStream_write(output->stream, pcm + accepted, n, timeout);
+        if (result < 0) { output_error("write", result); output->error = result; return accepted ? accepted : result; }
+        if (!result) break;
+        accepted += result;
+    }
+    return accepted;
+}
+
+JNIEXPORT jlong JNICALL Java_com_utun_chat_data_CallOutputNative_head(JNIEnv* env, jobject self, jlong handle) {
+    (void)env; (void)self;
+    struct call_output* output = (struct call_output*)(intptr_t)handle;
+    if (!output) { DEBUG_ERROR(DEBUG_CATEGORY_CALL, "AAudio head without output"); return -1; }
+    return AAudioStream_getFramesRead(output->stream);
+}
+
+/* head, timestamp frame/ns, underruns, buffer, capacity, device, performance, error, written. */
+JNIEXPORT void JNICALL Java_com_utun_chat_data_CallOutputNative_sample(JNIEnv* env, jobject self, jlong handle, jlongArray out) {
+    (void)self;
+    struct call_output* output = (struct call_output*)(intptr_t)handle;
+    if (!output || !out || (*env)->GetArrayLength(env, out) != 10) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CALL, "AAudio invalid sample"); return;
+    }
+    AAudioStream* s = output->stream;
+    int64_t frame = -1, ns = -1;
+    int result = AAudioStream_getTimestamp(s, CLOCK_MONOTONIC, &frame, &ns);
+    if (result < 0) { frame = -1; ns = -1; }
+    jlong values[10] = {AAudioStream_getFramesRead(s), frame, ns, AAudioStream_getXRunCount(s),
+        AAudioStream_getBufferSizeInFrames(s), AAudioStream_getBufferCapacityInFrames(s), AAudioStream_getDeviceId(s),
+        AAudioStream_getPerformanceMode(s), output->error, AAudioStream_getFramesWritten(s)};
+    (*env)->SetLongArrayRegion(env, out, 0, 10, values);
+}
+
+JNIEXPORT jint JNICALL Java_com_utun_chat_data_CallOutputNative_buffer(JNIEnv* env, jobject self, jlong handle, jint frames) {
+    (void)env; (void)self;
+    struct call_output* output = (struct call_output*)(intptr_t)handle;
+    if (!output || frames < 960) { DEBUG_ERROR(DEBUG_CATEGORY_CALL, "AAudio invalid buffer=%d", frames); return -1; }
+    int result = AAudioStream_setBufferSizeInFrames(output->stream, frames);
+    if (result < 0) output_error("buffer change", result);
+    return result;
+}
+
+JNIEXPORT void JNICALL Java_com_utun_chat_data_CallOutputNative_close(JNIEnv* env, jobject self, jlong handle) {
+    (void)env; (void)self;
+    struct call_output* output = (struct call_output*)(intptr_t)handle;
+    if (!output) return;
+    int result = AAudioStream_close(output->stream);
+    if (result < 0) output_error("close", result);
+    u_free(output);
+}
+
+JNIEXPORT void JNICALL Java_com_utun_chat_data_CallOutputNative_suspendClock(JNIEnv* env, jobject self, jlong id, jlong epoch) {
+    (void)env; (void)self;
+    call_audio_suspend_device(id, epoch);
+}