diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 49487fe4..03641d6b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,182 +19,182 @@ jobs:
           #- runs-on: ubuntu-20.04
           #  python: 3.5
           #  arch: x64
-          - runs-on: ubuntu-20.04
-            python: 3.6
-            arch: x64
-          - runs-on: ubuntu-20.04
-            python: 3.7
-            arch: x64
-          - runs-on: ubuntu-20.04
-            python: 3.8
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: ubuntu-20.04
-            python: 3.9
-            arch: x64
-          - runs-on: ubuntu-20.04
-            python: '3.10'
-            arch: x64
-          - runs-on: ubuntu-20.04
-            python: '3.11'
-            arch: x64
-          - runs-on: ubuntu-20.04
-            python: '3.12'
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: ubuntu-20.04
-            python: '3.13'
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: ubuntu-20.04
-            python: pypy-2.7
-            arch: x64
-          - runs-on: ubuntu-20.04
-            python: pypy-3.7
-            arch: x64
-          - runs-on: ubuntu-20.04
-            python: pypy-3.8
-            arch: x64
-          - runs-on: ubuntu-20.04
-            python: pypy-3.9
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: ubuntu-20.04
-            python: pypy-3.10
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-
-          - runs-on: ubuntu-20.04
-            python: 3.8
-            arch: x64
-            gcc: 10
-            name-extra: ' (GCC 10)'
-          - runs-on: ubuntu-20.04
-            python: 3.8
-            arch: x64
-            clang: 12
-            name-extra: ' (Clang 12)'
-
-          #- runs-on: ubuntu-20.04
-          #  python: 2.7
-          #  arch: x64
-          #  release: true
-          #  name-extra: ' (Release)'
-          - runs-on: ubuntu-20.04
-            python: 3.8
-            arch: x64
-            release: true
-            name-extra: ' (Release)'
-
-          #- runs-on: macos-11
-          #  python: 2.7
-          #  arch: x64
-          - runs-on: macos-12
-            python: 3.8
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: macos-12
-            python: 3.9
-            arch: x64
-          - runs-on: macos-12
-            python: '3.10'
-            arch: x64
-          - runs-on: macos-12
-            python: '3.11'
-            arch: x64
-          - runs-on: macos-12
-            python: '3.12'
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: macos-12
-            python: '3.13'
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: macos-12
-            python: 3.8
-            arch: x64
-            release: true
-            name-extra: ' (Release)'
-          #- runs-on: macos-11
-          #  python: pypy-3.6
-          #  arch: x64
-          - runs-on: macos-12
-            python: pypy-3.7
-            arch: x64
-          - runs-on: macos-12
-            python: pypy-3.8
-            arch: x64
-          - runs-on: macos-12
-            python: pypy-3.9
-            arch: x64
-          - runs-on: macos-12
-            python: pypy-3.10
-            arch: x64
-
-          #- runs-on: windows-2019
-          #  python: 2.7
-          #  arch: x64
-          - runs-on: windows-2019
-            python: 3.8
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: windows-2019
-            python: 3.9
-            arch: x64
-          - runs-on: windows-2019
-            python: '3.10'
-            arch: x64
-          - runs-on: windows-2019
-            python: '3.11'
-            arch: x64
-          - runs-on: windows-2019
-            python: '3.12'
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          - runs-on: windows-2019
-            python: '3.13'
-            arch: x64
-            run-praat-tests: true
-            name-extra: ' (with Praat tests)'
-          #- runs-on: windows-2019
-          #  python: 2.7
-          #  arch: x86
-          #  name-extra: ' (32-bit)'
-          - runs-on: windows-2019
-            python: 3.12
-            arch: x86
-            name-extra: ' (32-bit)'
-          - runs-on: windows-2019
-            python: 3.13
-            arch: x86
-            name-extra: ' (32-bit)'
-          - runs-on: windows-2019
-            python: 3.12
-            arch: x64
-            release: true
-            name-extra: ' (Release)'
-          - runs-on: windows-2019
-            python: pypy-3.6
-            arch: x86
-          - runs-on: windows-2019
-            python: pypy-3.7
-            arch: x64
-          - runs-on: windows-2019
-            python: pypy-3.8
-            arch: x64
-          - runs-on: windows-2019
-            python: pypy-3.9
-            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: 3.6
+#            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: 3.7
+#            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: 3.8
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: ubuntu-20.04
+#            python: 3.9
+#            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: '3.10'
+#            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: '3.11'
+#            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: '3.12'
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: ubuntu-20.04
+#            python: '3.13'
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: ubuntu-20.04
+#            python: pypy-2.7
+#            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: pypy-3.7
+#            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: pypy-3.8
+#            arch: x64
+#          - runs-on: ubuntu-20.04
+#            python: pypy-3.9
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: ubuntu-20.04
+#            python: pypy-3.10
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#
+#          - runs-on: ubuntu-20.04
+#            python: 3.8
+#            arch: x64
+#            gcc: 10
+#            name-extra: ' (GCC 10)'
+#          - runs-on: ubuntu-20.04
+#            python: 3.8
+#            arch: x64
+#            clang: 12
+#            name-extra: ' (Clang 12)'
+#
+#          #- runs-on: ubuntu-20.04
+#          #  python: 2.7
+#          #  arch: x64
+#          #  release: true
+#          #  name-extra: ' (Release)'
+#          - runs-on: ubuntu-20.04
+#            python: 3.8
+#            arch: x64
+#            release: true
+#            name-extra: ' (Release)'
+#
+#          #- runs-on: macos-11
+#          #  python: 2.7
+#          #  arch: x64
+#          - runs-on: macos-12
+#            python: 3.8
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: macos-12
+#            python: 3.9
+#            arch: x64
+#          - runs-on: macos-12
+#            python: '3.10'
+#            arch: x64
+#          - runs-on: macos-12
+#            python: '3.11'
+#            arch: x64
+#          - runs-on: macos-12
+#            python: '3.12'
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: macos-12
+#            python: '3.13'
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: macos-12
+#            python: 3.8
+#            arch: x64
+#            release: true
+#            name-extra: ' (Release)'
+#          #- runs-on: macos-11
+#          #  python: pypy-3.6
+#          #  arch: x64
+#          - runs-on: macos-12
+#            python: pypy-3.7
+#            arch: x64
+#          - runs-on: macos-12
+#            python: pypy-3.8
+#            arch: x64
+#          - runs-on: macos-12
+#            python: pypy-3.9
+#            arch: x64
+#          - runs-on: macos-12
+#            python: pypy-3.10
+#            arch: x64
+#
+#          #- runs-on: windows-2019
+#          #  python: 2.7
+#          #  arch: x64
+#          - runs-on: windows-2019
+#            python: 3.8
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: windows-2019
+#            python: 3.9
+#            arch: x64
+#          - runs-on: windows-2019
+#            python: '3.10'
+#            arch: x64
+#          - runs-on: windows-2019
+#            python: '3.11'
+#            arch: x64
+#          - runs-on: windows-2019
+#            python: '3.12'
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          - runs-on: windows-2019
+#            python: '3.13'
+#            arch: x64
+#            run-praat-tests: true
+#            name-extra: ' (with Praat tests)'
+#          #- runs-on: windows-2019
+#          #  python: 2.7
+#          #  arch: x86
+#          #  name-extra: ' (32-bit)'
+#          - runs-on: windows-2019
+#            python: 3.12
+#            arch: x86
+#            name-extra: ' (32-bit)'
+#          - runs-on: windows-2019
+#            python: 3.13
+#            arch: x86
+#            name-extra: ' (32-bit)'
+#          - runs-on: windows-2019
+#            python: 3.12
+#            arch: x64
+#            release: true
+#            name-extra: ' (Release)'
+#          - runs-on: windows-2019
+#            python: pypy-3.6
+#            arch: x86
+#          - runs-on: windows-2019
+#            python: pypy-3.7
+#            arch: x64
+#          - runs-on: windows-2019
+#            python: pypy-3.8
+#            arch: x64
+#          - runs-on: windows-2019
+#            python: pypy-3.9
+#            arch: x64
           - runs-on: windows-2019
             python: pypy-3.10
             arch: x64
@@ -274,6 +274,10 @@ jobs:
         run: |
           cmake --build build --target tests
 
+      - name: Setup tmate session
+        if: failure()
+        uses: mxschmitt/action-tmate@v3
+
   docs:
     name: Documentation
     runs-on: ubuntu-latest