I created a app that lowers Spotify's volume when the match starts, this uses screenshots to keep track of what's going on, this should be a safe method and vanguard shouldn't have an issue with it. I've used this for a few days and had no issues.

https://github.com/bossotron13/Valorant-Music

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The Spotify Ad blocked isn't toggleable (It mutes Spotify when an ad is playing so it doesn't ruin the mood) this will be changed later

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Notes:

• This was rushed and isn't coded perfectly
• If you aren't in a game it will lower the music
• When you die, it doesn't put the music up until the next round
• It only supports 16:9 resolutions (sorry 4:3 users - to be fair 4:3 only stretches the UI not the game)

Usage:

• Input resolution and that's it
• There is no user feed back but it should be working (will input prints later)
• You can download the .exe and use that or download python and execute the .py file.