https://joy.videvo.net/videvo_files/video/free/2015-09/large_watermarked/Master_Volume_on_Guitar_Amp_preview.mp4 Master Volume on Guitar Amp Female hand turns up master volume on Guitar Amp. Footage is in 4k. adjustingadjustmentampamplifieramplitudebanddbdbadecibeldecibelsdialelectric guitargaingroupguitarknoblivelive musicloudloudnessmaster volumemixingmusicperformancestagevenuevolume