chore: add alsa test sounds

Earthfile

@@ -32,6 +32,44 @@ avsync-video:
     RUN ffmpeg -r $FPS -f concat -i /final-frames.txt -i track.wav -c:v libvpx-vp9 -pix_fmt yuva420p -shortest avsync.webm
     SAVE ARTIFACT avsync.webm
 
+audio-channel-tracks:
+    FROM debian:bookworm
+    RUN apt-get update && apt-get install -y ffmpeg && rm -rf /var/lib/apt/lists/*
+    RUN mkdir -p /output
+    COPY assets/audio/channels /channels
+    WORKDIR /channels
+    RUN mkdir -p /output/wav/stereo /output/wav/5.1 /output/wav/7.1
+    RUN ffmpeg -i Left.wav -af "pan=stereo|FL=c0" /output/wav/stereo/Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Right.wav -af "pan=stereo|FR=c0" /output/wav/stereo/Right.wav -hide_banner -loglevel error && \
+        ffmpeg -i Center.wav -af "pan=stereo|FL=c0|FR=c0" /output/wav/stereo/Center.wav -hide_banner -loglevel error && \
+        # 5.1
+        ffmpeg -i Front_Left.wav -af "pan=5.1|FL=c0" /output/wav/5.1/Front_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Front_Right.wav -af "pan=5.1|FR=c0" /output/wav/5.1/Front_Right.wav -hide_banner -loglevel error && \
+        ffmpeg -i Front_Center.wav -af "pan=5.1|FC=c0" /output/wav/5.1/Front_Center.wav -hide_banner -loglevel error && \
+        ffmpeg -i Noise.wav -af "pan=5.1|LFE=c0" /output/wav/5.1/LFE_Noise.wav -hide_banner -loglevel error && \
+        ffmpeg -i Rear_Left.wav -af "pan=5.1|BL=c0" /output/wav/5.1/Rear_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Rear_Right.wav -af "pan=5.1|BR=c0" /output/wav/5.1/Rear_Right.wav -hide_banner -loglevel error && \
+        # 7.1
+        ffmpeg -i Front_Left.wav -af "pan=7.1|FL=c0" /output/wav/7.1/Front_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Front_Right.wav -af "pan=7.1|FR=c0" /output/wav/7.1/Front_Right.wav -hide_banner -loglevel error && \
+        ffmpeg -i Front_Center.wav -af "pan=7.1|FC=c0" /output/wav/7.1/Front_Center.wav -hide_banner -loglevel error && \
+        ffmpeg -i Noise.wav -af "pan=7.1|LFE=c0" /output/wav/7.1/LFE_Noise.wav -hide_banner -loglevel error && \
+        ffmpeg -i Side_Left.wav -af "pan=7.1|SL=c0" /output/wav/7.1/Side_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Side_Right.wav -af "pan=7.1|SR=c0" /output/wav/7.1/Side_Right.wav -hide_banner -loglevel error && \
+        ffmpeg -i Rear_Left.wav -af "pan=7.1|BL=c0" /output/wav/7.1/Rear_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Rear_Right.wav -af "pan=7.1|BR=c0" /output/wav/7.1/Rear_Right.wav -hide_banner -loglevel error
+    SAVE ARTIFACT /output/wav
+    RUN mkdir -p /output/ogg/stereo /output/ogg/5.1 /output/ogg/7.1
+    RUN for file in /output/wav/stereo/*.wav; do ffmpeg -i $file -c:a libvorbis /output/ogg/stereo/$(basename $file .wav).ogg -hide_banner -loglevel error; done && \
+        for file in /output/wav/5.1/*.wav; do ffmpeg -i $file -c:a libvorbis /output/ogg/5.1/$(basename $file .wav).ogg -hide_banner -loglevel error; done && \
+        for file in /output/wav/7.1/*.wav; do ffmpeg -i $file -c:a libvorbis /output/ogg/7.1/$(basename $file .wav).ogg -hide_banner -loglevel error; done
+    SAVE ARTIFACT /output/ogg
+    RUN mkdir -p /output/mp3/stereo /output/mp3/5.1 /output/mp3/7.1
+    RUN for file in /output/wav/stereo/*.wav; do ffmpeg -i $file -c:a libmp3lame /output/mp3/stereo/$(basename $file .wav).mp3 -hide_banner -loglevel error; done && \
+        for file in /output/wav/5.1/*.wav; do ffmpeg -i $file -c:a libmp3lame /output/mp3/5.1/$(basename $file .wav).mp3 -hide_banner -loglevel error; done && \
+        for file in /output/wav/7.1/*.wav; do ffmpeg -i $file -c:a libmp3lame /output/mp3/7.1/$(basename $file .wav).mp3 -hide_banner -loglevel error; done
+    SAVE ARTIFACT /output/mp3
+
 site:
     RUN npm install -g pnpm
     COPY package.json pnpm-lock.yaml /site