diff --git a/tools/chatgui/src/audio_capture.cpp b/tools/chatgui/src/audio_capture.cpp
new file mode 100644
index 00000000..4a3e29fa
--- /dev/null
+++ b/tools/chatgui/src/audio_capture.cpp
@@ -0,0 +1,144 @@
+#include "audio_capture.h"
+#include "audio_device.h"
+#include "sound_manager.h"
+#include "debug_config.h"
+#include <array>
+#include <atomic>
+#include <thread>
+#include <vector>
+
+struct AudioCapture::Session {
+    struct Slot {
+        AudioCapture* client = nullptr; // Только GUI.
+        std::atomic<AudioCapture*> active{nullptr};
+        std::atomic<unsigned> readers{0};
+    };
+    AudioDevice device;
+    QString key;
+    std::array<Slot, 2> slots;
+    bool streamProfile = false;
+    int requestedChannels = 1, channels = 1;
+    uint64_t tag = 0;
+    QElapsedTimer clock;
+    qint64 prepareAt = 0;
+
+    explicit Session(QString input) : key(std::move(input)) { clock.start(); }
+    ~Session() { stop(); }
+
+    void detach(Slot& slot) {
+        slot.active.store(nullptr);
+        // seq_cst: callback либо увидит nullptr, либо завершится до освобождения клиента.
+        while (slot.readers.load()) std::this_thread::yield();
+        if (slot.client->m_prepared) {
+            slot.client->m_prepared = false;
+            slot.client->m_stopped();
+        }
+    }
+    void stop() {
+        device.close(); // join до stopped: workers больше не получат PCM старого формата.
+        for (auto& slot : slots) if (slot.client) detach(slot);
+    }
+    void prepare() {
+        if (clock.elapsed() < prepareAt) return;
+        prepareAt = clock.elapsed() + 250;
+        for (auto& slot : slots) {
+            auto* client = slot.client;
+            if (!client || client->m_prepared) continue;
+            if (!client->m_ready(channels, device.device()->capture.internalChannels)) {
+                DEBUG_ERROR(DEBUG_CATEGORY_CALL, "capture: consumer start failed role=%s channels=%d",
+                            client->m_role == Role::Stream ? "stream" : "radio", channels);
+                continue;
+            }
+            client->m_prepared = true;
+            slot.active.store(client);
+            DEBUG_INFO(DEBUG_CATEGORY_CALL, "capture: attached role=%s profile=%s channels=%d rate=48000",
+                       client->m_role == Role::Stream ? "stream" : "radio", streamProfile ? "stream" : "radio", channels);
+        }
+    }
+    void recover() {
+        if (device.needsRecovery()) { stop(); device.retryLater(); }
+        if (device.initialized()) { prepare(); return; }
+        auto* context = SoundManager::instance()->context();
+        if (!context || !device.retryReady()) return;
+        ma_device_id id;
+        bool selected = SoundManager::deviceId(key, &id);
+        if (!key.isEmpty() && !selected) {
+            DEBUG_ERROR(DEBUG_CATEGORY_CALL, "capture: selected input unavailable; retaining selection");
+            device.retryLater(); return;
+        }
+        for (int count = requestedChannels; count >= 1; --count) {
+            auto config = ma_device_config_init(ma_device_type_capture);
+            config.capture.format = ma_format_s16; config.capture.channels = count; config.sampleRate = 48000;
+            config.capture.pDeviceID = selected ? &id : nullptr;
+            if (!streamProfile) AudioDevice::requestLowLatency(context, config);
+            auto callback = [this](const void* in, void*, unsigned frames) {
+                Frame frame{static_cast<const int16_t*>(in), frames, channels, device.callbackTimeUs(),
+                            device.route(), device.timingMeasured(), device.captureMissing()};
+                // Трансляция получает исходный PCM первой; оба callback только копируют данные в свои очереди.
+                for (auto& slot : slots) {
+                    slot.readers.fetch_add(1);
+                    if (auto* client = slot.active.load()) client->m_callback(frame);
+                    slot.readers.fetch_sub(1);
+                }
+            };
+            if (!device.init(context, config, streamProfile ? "stream-capture" : "radio-capture", tag, callback)) continue;
+            channels = count; prepareAt = 0; prepare();
+            if (device.start()) {
+                DEBUG_INFO(DEBUG_CATEGORY_CALL, "capture: opened profile=%s channels=%d requested=%d input=%s",
+                           streamProfile ? "stream" : "radio", channels, requestedChannels, qPrintable(key));
+                return;
+            }
+            stop();
+        }
+        DEBUG_ERROR(DEBUG_CATEGORY_CALL, "capture: cannot open selected input profile=%s", streamProfile ? "stream" : "radio");
+    }
+};
+
+AudioCapture::~AudioCapture() { close(); }
+
+bool AudioCapture::open(const QString& input, Role role, int channels, uint64_t tag, Ready ready,
+                        std::function<void()> stopped, Callback callback) {
+    close();
+    static std::vector<std::weak_ptr<Session>> sessions; // Только GUI; владение у подписчиков.
+    QString key = input;
+    if (key.isEmpty()) for (const auto& item : SoundManager::enumerateCaptureDevices()) {
+        if (item.isDefault) { key = item.id; break; }
+    }
+    for (auto it = sessions.begin(); it != sessions.end();) {
+        auto session = it->lock();
+        if (!session) { it = sessions.erase(it); continue; }
+        if (session->key == key) m_session = session;
+        ++it;
+    }
+    if (!m_session) { m_session = std::make_shared<Session>(key); sessions.push_back(m_session); }
+    auto& session = *m_session;
+    auto& slot = session.slots[role == Role::Stream ? 0 : 1];
+    if (slot.client) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CALL, "capture: duplicate consumer role=%s", role == Role::Stream ? "stream" : "radio");
+        m_session.reset(); return false;
+    }
+    bool takeover = role == Role::Stream && !session.streamProfile;
+    if (takeover) {
+        DEBUG_INFO(DEBUG_CATEGORY_CALL, "capture: stream takes ownership of capture profile");
+        session.stop(); session.streamProfile = true;
+    }
+    m_role = role; m_ready = std::move(ready); m_stopped = std::move(stopped); m_callback = std::move(callback);
+    slot.client = this;
+    if (role == Role::Stream || !session.streamProfile) { session.requestedChannels = channels; session.tag = tag; }
+    session.prepareAt = 0; session.device.retryNow(); session.recover();
+    return running();
+}
+
+void AudioCapture::close() {
+    if (!m_session) return;
+    auto& slot = m_session->slots[m_role == Role::Stream ? 0 : 1];
+    m_session->detach(slot); slot.client = nullptr;
+    DEBUG_INFO(DEBUG_CATEGORY_CALL, "capture: detached role=%s remaining=%d", m_role == Role::Stream ? "stream" : "radio",
+               int(m_session->slots[0].client != nullptr) + int(m_session->slots[1].client != nullptr));
+    m_session.reset(); m_callback = {}; m_ready = {}; m_stopped = {};
+}
+
+void AudioCapture::recover() { if (m_session) m_session->recover(); }
+bool AudioCapture::running() const {
+    return m_session && m_prepared && m_session->device.initialized() && ma_device_is_started(m_session->device.device());
+}
diff --git a/tools/chatgui/src/audio_capture.h b/tools/chatgui/src/audio_capture.h
new file mode 100644
index 00000000..6f04e576
--- /dev/null
+++ b/tools/chatgui/src/audio_capture.h
@@ -0,0 +1,42 @@
+#pragma once
+#include <QString>
+#include <cstdint>
+#include <functional>
+#include <memory>
+
+/* GUI владеет подпиской, сессия — устройством. Одинаковый выбранный вход открывается один раз.
+ * Профиль трансляции имеет приоритет и сохраняется для рации после её остановки.
+ * Callback только копирует PCM; ready/stopped вызываются в GUI вне аппаратного callback.
+ * close() ждёт завершения своего callback, не останавливая устройство другого потребителя. */
+class AudioCapture {
+public:
+    enum class Role { Stream, Radio };
+    struct Frame {
+        const int16_t* pcm;
+        unsigned frames;
+        int channels;
+        int64_t timeUs;
+        uint64_t route;
+        bool measured, missing;
+    };
+    using Ready = std::function<bool(int channels, int nativeChannels)>;
+    using Callback = std::function<void(const Frame&)>;
+    AudioCapture() = default;
+    ~AudioCapture();
+    AudioCapture(const AudioCapture&) = delete;
+    AudioCapture& operator=(const AudioCapture&) = delete;
+    bool open(const QString& input, Role role, int channels, uint64_t tag, Ready ready,
+              std::function<void()> stopped, Callback callback);
+    void close();
+    void recover();
+    bool subscribed() const { return bool(m_session); }
+    bool running() const;
+private:
+    struct Session;
+    std::shared_ptr<Session> m_session;
+    Ready m_ready;
+    std::function<void()> m_stopped;
+    Callback m_callback;
+    Role m_role = Role::Radio;
+    bool m_prepared = false;
+};