The term 'Mixer Setting' refers to the settings on a mixer, which is a device used to combine multiple audio signals into one. The four solutions for this term are BASS (4 letters), WHIP (4 letters), SLOW (4 letters), and BLEND (5 letters). BASS is a setting that adjusts the low-frequency sound of the audio signal. WHIP is a setting that adjusts the high-frequency sound of the audio signal. SLOW is a setting that adjusts the speed of the audio signal. BLEND is a setting that adjusts the balance between the different audio signals.