# 🔈 Audio ## Things [[Atom Amp+ Headphone Amplifier]] [[Fostex TH900 Mk2 Headphones]] ## Instructions [[Open Sound Control Panel From Command Line]] [[Convert FLAC to 320kbps MP3]] ## Concepts ### General [[Sound Pressure Level (dB)]] [[Sensitivity (dBV, dBmW)]] [[Driver Size (mm)]] [[Gain Structuring]] [[Bit Depth]] ### Recording [[Active Vs Passive Microphones]] [[Presence Boost]] [[Noise Gate]] [[High Pass Filter (Bass Rolloff)]]