Mod 5 Volume Levels

Perhaps I shouldn't admit this, but yesterday while driving I realized that I typically only use volume levels on my car stereo that evenly divide by 5. It turns out that under very rare circumstances, this isn't actually sufficient. Yesterday was such an occasion: 35 was too loud and 30 wasn't quite loud enough. I compromised and went with a volume level that was even. I figured that was good enough under the circumstances.