diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0e17317..4c122c2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,13 +2,13 @@ name: build
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, dev ]
     tags: [ 'v*' ]
   pull_request:
     branches: [ master ]
 
 jobs:
-  ubuntu-build:
+  build-ubuntu:
     runs-on: ubuntu-latest
 
     steps:
@@ -21,10 +21,8 @@ jobs:
       run: meson setup -Dwerror=true build
     - name: compile
       run: cd build && meson compile
-    - name: test
-      run: cd build && meson test
 
-  build-deb:
+  build-ubuntu-deb-package:
     runs-on: ubuntu-latest
 
     steps:
@@ -39,7 +37,22 @@ jobs:
     #- name: Install .deb
     #  run: dpkg -i ../redsea_*.deb
 
-  macos-build:
+  build-debian-oldoldstable:
+    runs-on: ubuntu-latest
+    container: debian:buster
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install dependencies (apt-get)
+      run: apt-get update && apt-get -y install python3-pip ninja-build build-essential libsndfile1-dev libliquid-dev nlohmann-json3-dev
+    - name: Install meson (pip3)
+      run: pip3 install --user meson
+    - name: meson setup
+      run: export PATH=$PATH:$HOME/.local/bin && meson setup -Dwerror=true build
+    - name: compile
+      run: export PATH=$PATH:$HOME/.local/bin && cd build && meson compile
+
+  build-test-macos:
     runs-on: macos-latest
 
     steps:
@@ -53,7 +66,7 @@ jobs:
     - name: test
       run: cd build && meson test
 
-  windows-msys2-mingw-build:
+  build-windows-msys2-mingw:
     runs-on: windows-latest
 
     steps:
@@ -84,9 +97,6 @@ jobs:
       shell: msys2 {0}
       run: |
         meson setup -Dwerror=true build && cd build && meson compile
-    - name: test
-      shell: msys2 {0}
-      run: cd build && meson test
     - name: Package into distrib
       shell: msys2 {0}
       run: >-
@@ -100,7 +110,7 @@ jobs:
         awk '{$1=$1};1' |
         xargs -I{} cp {} distrib/
 
-  windows-cygwin-build:
+  build-windows-cygwin:
     runs-on: windows-latest
 
     steps:
@@ -139,6 +149,3 @@ jobs:
     - name: Build redsea
       shell: C:\cygwin\bin\bash.exe -eo pipefail '{0}'
       run: meson setup -Dwerror=true build && cd build && meson compile
-    - name: test
-      shell: C:\cygwin\bin\bash.exe -eo pipefail '{0}'
-      run: cd build && meson test
diff --git a/src/redsea.cc b/src/redsea.cc
index 58d859f..12ca917 100644
--- a/src/redsea.cc
+++ b/src/redsea.cc
@@ -128,26 +128,26 @@ int processMPXInput(Options options) {
 
   auto& output_stream = options.feed_thru ? std::cerr : std::cout;
 
-  std::vector<Channel> channels;
+  std::vector<std::unique_ptr<Channel>> channels;
   std::vector<std::unique_ptr<Subcarrier>> subcarriers;
   for (uint32_t i = 0; i < options.num_channels; i++) {
-    channels.emplace_back(options, i, output_stream);
+    channels.emplace_back(std::make_unique<Channel>(options, i, output_stream));
     subcarriers.push_back(std::make_unique<Subcarrier>(options));
   }
 
   while (!mpx.eof()) {
     mpx.fillBuffer();
     for (uint32_t i = 0; i < options.num_channels; i++) {
-      channels[i].processBits(subcarriers[i]->processChunk(mpx.readChunk(i)));
-      if (channels[i].getSecondsSinceCarrierLost() > 10.f &&
+      channels[i]->processBits(subcarriers[i]->processChunk(mpx.readChunk(i)));
+      if (channels[i]->getSecondsSinceCarrierLost() > 10.f &&
           subcarriers[i]->getSecondsSinceLastReset() > 5.f) {
         subcarriers[i]->reset();
-        channels[i].resetPI();
+        channels[i]->resetPI();
       }
     }
   }
 
-  for (uint32_t i = 0; i < options.num_channels; i++) channels[i].flush();
+  for (uint32_t i = 0; i < options.num_channels; i++) channels[i]->flush();
 
   return EXIT_SUCCESS;
 }