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Multi output tone generator
Ben Pierce:
Hey everyone. I'm new to the forums. I work for an audio electronics company. I am trying to find or build a tone generator for testing audio consoles and audio over Ethernet. What I need is something that can send a tone to 64 XLR input channels simultaneously. I'd prefer if it wasn't a computer-based solution because computer audio can glitch and pop which could affect my testing results. My idea is a piece of gear that has one or more analog tone generators that can be fed to DB25 connectors. Does anyone have any advice on how I could do this? Sonifex has an 8 channel unit but it's too pricey.
Scott Holtzman:
--- Quote from: Ben Pierce on August 20, 2018, 01:17:12 PM ---Hey everyone. I'm new to the forums. I work for an audio electronics company. I am trying to find or build a tone generator for testing audio consoles and audio over Ethernet. What I need is something that can send a tone to 64 XLR input channels simultaneously. I'd prefer if it wasn't a computer-based solution because computer audio can glitch and pop which could affect my testing results. My idea is a piece of gear that has one or more analog tone generators that can be fed to DB25 connectors. Does anyone have any advice on how I could do this? Sonifex has an 8 channel unit but it's too pricey.
--- End quote ---
Royce has a $200 8 channel distribution amp that is flat and virtually unmeasurable THD.
Ben Pierce:
Ok. Something like that could work. It's definitely going in the right direction. So would there be any downside to say running a tone generator into one main distribution amp, then send the 8 outputs to 8 other distribution amps? That way I could have 64 channels.
Scott Holtzman:
--- Quote from: Ben Pierce on August 20, 2018, 02:52:50 PM ---Ok. Something like that could work. It's definitely going in the right direction. So would there be any downside to say running a tone generator into one main distribution amp, then send the 8 outputs to 8 other distribution amps? That way I could have 64 channels.
--- End quote ---
Rolls RA163. Input impedance is probably high enough just to parallel the inputs. You could daisy chain 9 of them if you wish.
Riley Casey:
Simplest way to get a lot of mic level outputs on XLRs would be to secure a few passive press mult boxes and drive them with your tone generator du jour. Even a phone app tone generator would work although you might want a single four output distribution amp to drive the mults.
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