diff --git a/firmware/application/apps/ui_fileman.cpp b/firmware/application/apps/ui_fileman.cpp
index 20869fe7e..554895cd5 100644
--- a/firmware/application/apps/ui_fileman.cpp
+++ b/firmware/application/apps/ui_fileman.cpp
@@ -43,6 +43,7 @@ namespace ui {
 static const fs::path txt_ext{u".TXT"};
 static const fs::path ppl_ext{u".PPL"};
 static const fs::path c8_ext{u".C8"};
+static const fs::path cu8_ext{u".CU8"};
 static const fs::path c16_ext{u".C16"};
 static const fs::path cxx_ext{u".C*"};
 static const fs::path png_ext{u".PNG"};
@@ -88,8 +89,11 @@ fs::path get_partner_file(fs::path path) {
         path.replace_extension(txt_ext);
     else if (path_iequal(ext, txt_ext)) {
         path.replace_extension(c8_ext);
+        if (!fs::file_exists(path))
+            path.replace_extension(cu8_ext);
         if (!fs::file_exists(path))
             path.replace_extension(c16_ext);
+
     } else
         return {};
 
diff --git a/firmware/application/apps/ui_fileman.hpp b/firmware/application/apps/ui_fileman.hpp
index 05a10cce9..511b6276f 100644
--- a/firmware/application/apps/ui_fileman.hpp
+++ b/firmware/application/apps/ui_fileman.hpp
@@ -80,6 +80,7 @@ class FileManBaseView : public View {
         {u".PNG", &bitmap_icon_file_image, ui::Color::green()},
         {u".BMP", &bitmap_icon_file_image, ui::Color::green()},
         {u".C8", &bitmap_icon_file_iq, ui::Color::dark_cyan()},
+        {u".CU8", &bitmap_icon_file_iq, ui::Color::dark_cyan()},
         {u".C16", &bitmap_icon_file_iq, ui::Color::dark_cyan()},
         {u".WAV", &bitmap_icon_file_wav, ui::Color::dark_magenta()},
         {u".PPL", &bitmap_icon_file_iq, ui::Color::white()},                  // Playlist/Replay
diff --git a/firmware/application/file.cpp b/firmware/application/file.cpp
index 08bf0f36f..75b707486 100644
--- a/firmware/application/file.cpp
+++ b/firmware/application/file.cpp
@@ -30,6 +30,7 @@
 
 namespace fs = std::filesystem;
 static const fs::path c8_ext{u".C8"};
+static const fs::path cu8_ext{u".CU8"};
 static const fs::path c16_ext{u".C16"};
 
 Optional<File::Error> File::open_fatfs(const std::filesystem::path& filename, BYTE mode) {
@@ -543,12 +544,14 @@ bool path_iequal(
 
 bool is_cxx_capture_file(const path& filename) {
     auto ext = filename.extension();
-    return path_iequal(c8_ext, ext) || path_iequal(c16_ext, ext);
+    return path_iequal(c8_ext, ext) || path_iequal(cu8_ext, ext) || path_iequal(c16_ext, ext);
 }
 
 uint8_t capture_file_sample_size(const path& filename) {
     if (path_iequal(filename.extension(), c8_ext))
         return sizeof(complex8_t);
+    if (path_iequal(filename.extension(), cu8_ext))
+        return sizeof(complexu8_t);
     if (path_iequal(filename.extension(), c16_ext))
         return sizeof(complex16_t);
     return 0;
diff --git a/firmware/application/io_convert.cpp b/firmware/application/io_convert.cpp
index 62507d32d..9eea9465d 100644
--- a/firmware/application/io_convert.cpp
+++ b/firmware/application/io_convert.cpp
@@ -24,6 +24,7 @@
 
 namespace fs = std::filesystem;
 static const fs::path c8_ext = u".C8";
+static const fs::path cu8_ext = u".CU8";
 
 namespace file_convert {
 
@@ -59,21 +60,42 @@ void c8_to_c16(const void* buffer, File::Size bytes) {
     }
 }
 
+// Convert cu8 buffer to c16 buffer.
+// Same buffer used for input & output; input size is bytes; output size is 2*bytes.
+void cu8_to_c16(const void* buffer, File::Size bytes) {
+    complexu8_t* src = (complexu8_t*)buffer;
+    complex16_t* dest = (complex16_t*)buffer;
+    uint32_t i = bytes / sizeof(complexu8_t);
+
+    if (i != 0) {
+        do {
+            i--;
+            int16_t re_out = ((int16_t)src[i].real() - 128) * 256;
+            int16_t im_out = ((int16_t)src[i].imag() - 128) * 256;
+            dest[i] = {(int16_t)re_out, (int16_t)im_out};
+        } while (i != 0);
+    }
+}
+
 } /* namespace file_convert */
 
 // Automatically enables C8/C16 conversion based on file extension
 Optional<File::Error> FileConvertReader::open(const std::filesystem::path& filename) {
     convert_c8_to_c16 = path_iequal(filename.extension(), c8_ext);
+    convert_cu8_to_c16 = path_iequal(filename.extension(), cu8_ext);
     return file_.open(filename);
 }
 
 // If C8 conversion enabled, half the number of bytes are read from the file & expanded to fill the whole buffer.
 File::Result<File::Size> FileConvertReader::read(void* const buffer, const File::Size bytes) {
-    auto read_result = file_.read(buffer, convert_c8_to_c16 ? bytes / 2 : bytes);
+    auto read_result = file_.read(buffer, (convert_c8_to_c16 || convert_cu8_to_c16) ? bytes / 2 : bytes);
     if (read_result.is_ok()) {
         if (convert_c8_to_c16) {
             file_convert::c8_to_c16(buffer, read_result.value());
             read_result = read_result.value() * 2;
+        } else if (convert_cu8_to_c16) {
+            file_convert::cu8_to_c16(buffer, read_result.value());
+            read_result = read_result.value() * 2;
         }
         bytes_read_ += read_result.value();
     }
diff --git a/firmware/application/io_convert.hpp b/firmware/application/io_convert.hpp
index 0455444f3..20565880a 100644
--- a/firmware/application/io_convert.hpp
+++ b/firmware/application/io_convert.hpp
@@ -52,6 +52,7 @@ class FileConvertReader : public stream::Reader {
     const File& file() const& { return file_; }
 
     bool convert_c8_to_c16{};
+    bool convert_cu8_to_c16{};
 
    protected:
     File file_{};
diff --git a/firmware/common/complex.hpp b/firmware/common/complex.hpp
index b8f184e3a..df9a1ec59 100644
--- a/firmware/common/complex.hpp
+++ b/firmware/common/complex.hpp
@@ -106,10 +106,12 @@ struct complex<int16_t> {
 } /* namespace std */
 
 using complex8_t = std::complex<int8_t>;
+using complexu8_t = std::complex<uint8_t>;
 using complex16_t = std::complex<int16_t>;
 using complex32_t = std::complex<int32_t>;
 
 static_assert(sizeof(complex8_t) == 2, "complex8_t size wrong");
+static_assert(sizeof(complexu8_t) == 2, "complexu8_t size wrong");
 static_assert(sizeof(complex16_t) == 4, "complex16_t size wrong");
 static_assert(sizeof(complex32_t) == 8, "complex32_t size wrong");