Add chiptune-mix

chiptune-mix.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p sidplayfp ffmpeg-full
+# Creates 4-channel flac file to be played with mpv profile “musicvideo-c64”
+# Set HVSC_BASE to point to your HVSC directory, otherwise the output
+# will be 2 seconds long
+if [ "$#" != "2" ]; then
+    exit 1
+fi
+
+sidplayfp -w"${2}" "$1"
+sidplayfp -u2 -u3 -w"${2}1" "$1"
+sidplayfp -u1 -u3 -w"${2}2" "$1"
+sidplayfp -u1 -u2 -w"${2}3" "$1"
+
+# order is pretty much fucked up, thank you whatever is causing this
+ffmpeg -i "${2}2.wav" -i "${2}.wav" -i "${2}1.wav" -i "${2}3.wav" -filter_complex 'join=inputs=4:channel_layout=4.0,volume=2' "${2}.flac"