Manual zz. Version 1. No user serviceable parts inside; refer servicing to qualified personnel. This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure—voltage that may be sufficient to constitute a risk of shock.
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Connect a reference microphone and turn on auto-equalization and it plays pink noise through your speakers and adjusts the EQ to give you flat response. After flattening my room response, the sound coming through my DSP is simultaneously absolutely awful and absolutely glorious. When I put the EQ into digital bypass, the hiss is still there; only when I power off the EQ to make it engage its physical bypass relays does the hiss disappear. Holy crap; I only did that once.
Connect the reference mike and select it as the real-time analysis RTA input source. The auto-EQ can generate EQ settings to make your room sound like any desired equalization curve; but why target anything other than flat? Put on ear protection and prepare for a physical assault at least with my system. Turn on RTA pink noise generation at dB.
Even though the input gain is set for auto, it seemed as though running with pink noise at dB resulted in an EQ curve and master volume set much higher than bypass levels. Running the RTA with pink noise at dB gave me settings that deliver about the same overall sound volume whether the EQ was bypassed or in the loop. The new equalization curve is automatically transferred to the live EQ settings. I had the preamp at a relatively low level, and the bass notes sounded like they were playing out a speaker with a shredded woofer — very buzzy.
Wow, wow, wow. And then I turned up the preamp to louder than normal listening volume. Once I got up to a high enough signal level to swamp the hiss in the background and get past the low-frequency artifacting more on this in a bit , the sound was unbelievable.
It was unbelievable. So chalk one up to the inability of the digital signal processing algorithm to handle extreme differences between neighboring bands. In fact, I can turn down the digital master EQ output level, turn up the input amplitude, and largely eliminate both the hiss and the buzz at the same output amplitude. That is to say, I really wanted to know whether the hiss and buzz were a design flaw or a faulty unit.
So I bought another one — and when it arrived, it simply would not do auto-EQ. I spent about an hour reading and re-reading the manual to find out why every time I pushed the AUTO-Q button, it just came right back without doing anything. Well it turns out, the second one was running 1. Go Behringer!
I know the hot glue is at risk of popping off the metal case; in the long term, I may put the PROM in static foam in a baggie and tie it to something. I had described the difference in sound to Jeremy, and he and I have similar enough impressions of sound reproduction that he believed me and wanted to hear for himself. Of course the correction in the bass range helps with the enjoyment as well. I let Jeremy run the controls and I handed him CDs to try.
I love them all. Favorite album ever. With the band. Finally from Jeremy: I just want to sit and listen to all of my music all over again. It could thus be used strictly as a setup instrument to set an external EQ graphic or parametric for as flat a response as can be achieved with as many bands as the external EQ has available, then removed from the system. You can follow any responses to this entry through the RSS 2. You can leave a response , or trackback from your own site.
The low range frequencies seem random. There could be hidden peaks between bars. Also, these abrupt differences could be the cause of the buzz. It may be bad DSP but that parameterization seems too radical to me.
Great write-up. The Fail-safe relays are not for speaker protection but are so that the signal path will not be broken if the power to this unit fails. Cheers, Andrew. Hey Keith, Thanks so much for posting this blog! I am really excited to try this out myself! About two months ago, a friend of mine asked me to run sound for a wedding he was playing with his band. I rented a console, and borrowed gear from everyone I knew, and somehow pulled it off. I was using my laptop with a MOTU interface to EQ my monitor sends and main outs — mostly for notching out feedback, but I did my best just using my ears to flatten out the room.
Thanks again! Just carry your best earmuffs for the setup process. I just wanted to let you know how much I enoyed your write-up! Having been using this platform and process since my first version of this EQ DSP — and still in daily service back in and can still clearly remember that feeling of audio euphoria that you described upon listening to your results of AUTO-EQ processing.
I have also recently acquired actually from a barter for mixdown services a DSP with the 1. If you could can, can you provide a little detail regarding the 27C EPROM chip you had burned — was it a specific version i. Silvio, I think any will do. You can see the Toshiba chip that Joel had on hand in one of the photos about midway through the post.
I know it took some time reading the manual to figure it out. This is not my main problem with the unit however. When the EQ is enabled, there is unacceptable noise through the system with or without signal. You mention this above and brush right past. Has anyone found a solution to this? Ground loop interference? Justin, what I hear is definitely hiss, not ground loop hum.
At least on my unit, the hiss seems to be at a constant internal amplitude, so you can fade it into the background by swamping it with your real signal at a higher amplitude and compensating with the master volume.
I wonder if anyone will follow up on 5 year post. I know why your pinked room sounds bad. They remove this little treasure bit of knowledge when they added to the manual 20 years after the first. Dave, I wonder whether you had a chance to read the post in detail.
I remember you said that. I guess I was overwhelmed by length and detail. I do that myself. I remember my self thinking flat was pretty good. As sound guy, I continued to get complaints about clarity and hurting ears and often I had high frequency feedback problems that limited the usable gain I could work with.
I have always been sensitive to distortion in amplified sound and today as senior citizen I know first hand the discomfort I was not aware of when I was strong and healthy. I can hear every individual clearly. Bottom line a flat curve for acoustic output is not how sound works naturally. Picked up a used DSP recently,I believe both units are similar. As regards hiss and buzz in analogue mode I was able to suppress all noise by setting gate threshold to around to , you have to be careful here with your quite passages,a little bit of trial and error will sort this out.
The next two culprits were the Ultramizer and Output gain bring both of these to around the 16db and adjust to taste. These settings were then linked to all bands. I have found that while the hiss is still there it is masked and once the passage of music has stopped the gate will keep your system hiss free.
My next task is to tackle all bands individually. I agree with everything Keith has to say I am currently rediscovering all my old music collection including Nightfly. Also used it on a live pa setup, does what it says on the tin, doubles your headroom and sits everything in the mix.
Time to change the batteries was about 15 seconds. Please note that everything is set up according to the instructions, and so far I have not had problems with earlier measurements. Do you give me expert advice, what happened and why the device is not going to make a measurement? What is your advice, what should I do?? Any help is appreciated! Press the setup button.
Press the RTA button. Press the Tools button. Press the Auto Q button. Hold the microphone about three feet back from the front of the speaker, focusing it between low and high frequency drivers.
The unit will measure the frequency response of your system. Press OK. Press soft key A memory. Press soft key B store. Select the correct program number using the cursor buttons. Press soft key A OK. Press soft key A Memory.
Behringer DSP8024 User Manual
Connect a reference microphone and turn on auto-equalization and it plays pink noise through your speakers and adjusts the EQ to give you flat response. After flattening my room response, the sound coming through my DSP is simultaneously absolutely awful and absolutely glorious. When I put the EQ into digital bypass, the hiss is still there; only when I power off the EQ to make it engage its physical bypass relays does the hiss disappear. Holy crap; I only did that once. Connect the reference mike and select it as the real-time analysis RTA input source.
Behringer DSP8024 Stereo Amplifier User Manual
Quick Links. See also: User Manual. User's Manual. Table of Contents. High-performance bit multi-engine effects processor 41 pages. Behringer feedback destroyer dspp feedback suppressor: user guide 32 pages. Page 2: Safety Instructions The user should not attempt to service the appliance beyond that which is described in the operating instructions.
Behringer Ultra-Curve Pro DSP8024 User Manual