Hello,
I need an analog time delay circuit to make a delay for 6 or 7 speakers, So the circuit should be able to response on the audio freq Is there any expert in the field to help me to know the best way to make the needed delay?
Thanks for any help
Oops!
Any speaker must be connected to an separate delayer ... It MUST be done electronically..
If you want a delay of a few milliseconds you could do it in analogue, but greater than that you would probably need a digital solution.
A tighter spec would be required
martin
martin griffith =D9=86=D9=88=D8=B4=D8=AA=D9=87 =D8=A7=D8=B3=D8=AA:
Hello Martin,
Thanks,
Yes That delay time is enough, Digital does not seem to be a good choice for only 7 transducers, so I prefer the analogue solution. Do you know any scheme to do the job with a constant response on all audio frequencies?
-- How long of a delay?
I think you are out of your depth, you should go digital, but do you need a custom solution. There are many delays on the market, but I'm out of touch, for the last year or so
The bbc did a delay line for an audio compressor in the 70's, just a millisecond or so, can't remember the device number, but it would have cost several thousand pounds in those days, and that is just for one quality channel.
You need to be specific, like, frequency reponse, distortion, delay time, noise, delay adjustment etc. Without that discussion is meaningless
martin
An All-Pass filter with a crossover frequency of Fo will have a delay of 1/Fo (IIRC), for all frequencies below Fo.
So, if you need 20KHz response, you can get 50uSec per section... only takes 20 sections to get 1mSec ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
I was trying to forget all that , but EF86 or 12AT7's?
Pick your weapon
martin
Oops!
Any speaker must be connected to an separate delayer ... It MUST be done electronically..
-----------------------------------------------------
Do a Google search on CCD analog delay. People messed around with these in the 1970s. Might still be viable if you want analog. I have no idea what the distortion spec would be.
Tam
I haven't done anything with a tube in it since around 1960 ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Always found that the metalwork was worse than the electronics. Too much blood.
But back to the OP, he should check out the wavefront semi al3101, weird but useful, despite the visciously crap documentation and software. I would have used it if I could have figured out the delay buffer
martin
[snip] [snip]
But I do still own a fairly complete set of Greenlee chassis punches ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
I still own 10 fingers
martin
Me too.
Pretty hard to cut yourself on a chassis punch ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Trivial when you try to remove the punchee.
-- Many thanks, Don Lancaster voice phone: (928)428-4073 Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552 rss: http://www.tinaja.com/whtnu.xml email: don@tinaja.com Please visit my GURU\'s LAIR web site at http://www.tinaja.com
a long spring with mag tranducers at each end! :)
-- Real Programmers Do things like this. http://webpages.charter.net/jamie_5
Clamp it in a vice and push it out from the back with a screwdriver or scratch awl. If too many are sticking in the die you should buy one of the newer "Slug buster" versions.
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
Naaah! There's a hole in the top piece. Clamp in a vise and knock out the "punchee" with a nail or Phillips screwdriver ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
I've punched many hundreds of holes in control panels and chassis with Greenlee punches, and can't remember getting a scratch. The punched slug usually comes out very easily when you screw out the bolt and give the bolt head a sharp rap on the concrete floor.
Now, *drilling* sheet metal (especially thin cheesy aluminum or steel) can get hairy if you don't secure the metal on the drill press, don't provide a sacrificial back-up behind the part, and a large-diameter drill bit catches as it breaks through.
Best regards, Spehro Pefhany
-- "it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
All pass filters would be a poor choice for this project since they generate delay at the damped frequency, not delay across the audio spectrum. [You use all pass filters to equalize group delay by adding delay in specific regions.]
The choice (and a poor one) for this project would be a Bessel (Thompson) filter. However, if you need miliseconds of delay across
20Khz, I'd go digital (and I'm an analog guy). Two chips from Crystal, and a software fifoElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.