Press the "Volume Up" button on a CD player, radio or other audio component to increase volume.
Draw a crescendo ("<") sign below the bar in a piece of music. When the music is played, it will crescendo, or get louder, over any span of music marked with a crescendo sign.
Click "Insert Plugin" on a track in a digital audio workstation, and select a compressor. Turn up "Gain" while turning down "Threshold" to reduce the dynamic range of an audio track. This will make the track sound louder and flatter when played back.
Plug a line-level signal coming from a sound board into an "Input" jack on a power amp using a TRS cable. Connect the power amp "Output" jacks to speaker "Input" jacks. Turn everything on, and any music coming from the mixer will be amplified and sent over a speaker system.
Turn up the "Bass" level on your stereo's EQ. Low-frequency sound waves travel further, which will cause music to sound louder and potentially more obnoxious. How well this works will depend on the quality of your speakers.