It is standard practice to have 0db attenuation on the amplifiers driving a PA system. Level control will be done on the DSP managing the speakers. In a system with multiple amplifiers, driving different components, this is the only way to adjust the overall level accurately and quickly.
Dan Andrews -----Original Message----- From: sursound-boun...@music.vt.edu [mailto:sursound-boun...@music.vt.edu] On Behalf Of John Leonard Sent: 13 October 2012 19:53 To: Surround Sound discussion group Subject: Re: [Sursound] Auro 3D Most commonly, I've come across this in PA systems hired in by performers: the most heinous being that of a concert for a friend of mine, where the balance engineer (a studio engineer, not a live sound one, which didn't help) could barely lift the faders without the system going into feedback. When I suggested to the chap who'd installed the sound system that he might turn the amplifiers down and let the balance engineer set the desk gains properly, I was told that everything had to be at maximum "or the speakers don't work properly." The same company also installed the PA at the second venue for the same concert and when I turned up (I was playing in some sound effects) the entire system was buzzing loudly. Same chap doing the engineering - his response? "No-one will notice once the music starts." After he'd gone for his tea, I did a little checking and found the stereo output leads from the desk neatly coiled up and placed over a mains distribution board into which the soun d crew's mobile phone chargers were plugged. Moved the cables, hum gone. This particular company seems to have the contract for jazz concerts at some very prestigious London venues and I'm always amazed at how they continue to get work. John On 13 Oct 2012, at 19:10, Jascha Narveson <jnarve...@wesleyan.edu> wrote: > Yeah - can you name some venues that do this? I want to know which ones to avoid! _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
