Use blackhole-16 for output

Author: padenot

.github/workflows/test.yml

@@ -39,17 +39,17 @@ jobs:
 
     - name: Setup blackhole-2ch
       run: |
-        brew install blackhole-2ch
+        brew install blackhole-2ch blackhol-16ch
         sudo killall -9 coreaudiod
         SwitchAudioSource -s "BlackHole 2ch" -t input
-        SwitchAudioSource -s "BlackHole 2ch" -t output
+        SwitchAudioSource -s "BlackHole 16ch" -t output
 
     - name: Build
       run: cargo build --verbose
 
     - name: Regular Test
       run: sh run_tests.sh
-    
+
     - name: AddressSanitizer Test
       if: ${{ matrix.rust == 'nightly' }}
       run: sh run_sanitizers.sh address