Conversation so far:
what's a side project The Twilight Sad worked on?
The Twilight Sad's Guitarist Andy MacFarlane composed the song The Weath-er Is Bad for Semiconductor Films' short film Brilliant Noise
what instrument The Twilight Sad's Guitarist Andy MacFarlane play on The Weath-er Is Bad for Semiconductor Films' short film Brilliant Noise?
The Twilight Sad's Guitarist Andy MacFarlane composed the song The Weath-er Is Bad for Semiconductor Films' short film Brilliant Noise

Question: what other side project did he work on?
Self-contained rewrite: what other side project did The Twilight Sad work on besides The Weath-er Is Bad?