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Looking for 5-10second audio delay line (300Hz - 15Khz bandwidth)

Hi folks,

I'm looking for a stand-alone delay line unit that can handle an input audio bandwidth of at least 300Hz - 15Khz.and continuously delay that audio by at least 5-10 seconds. I guess that I'm probably looking for something similar to the devices used in broadcast studios to censor expletives when taking incoming phone-in programmes.

Can anyone in this NG recommend a supplier (preferably in Europe) of such a device/module, OR alternatively suggest a suitable circuit design (or chip-set ?) that will enable me to build one up from 'scratch'?

Many TIA,

- Dave

--
David C.Chapman - (dcchapman@minda.co.uk)
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Reply to
David Chapman
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On a sunny day (Sun, 17 Jan 2010 20:12:34 +0000) it happened David Chapman wrote in :

PC, or PC motherboard for embedded, with 2 soundcards, some software.

Reply to
Jan Panteltje

What quality do you need?

Reply to
MooseFET

Does that mean you want something that just handles *speech*? (15KHz is considerably higher than that -- yet the 300 and 15K numbers suggest you aren't looking for high end audio kit (?)

It's a trivial design -- depending on what sort of quality you want in the signal, how "adjustable" you want it to be, how you want it to behave "in transition", etc.

Do you have specific size, power, quality, reliability, cost, etc. requirements? Or, will you settle for "anything that gets the job done"?

Reply to
D Yuniskis

AFAIK these can be bought as standard devices. Did you google for audio delay line?

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Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
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Reply to
Nico Coesel

The days of the old Bucket Brigades..

Reply to
Jamie

One simple way is to use a loop of tape with a tape recorder; record on one head and playback on another.

Reply to
Robert Baer

Another way is to make your own artificial transmission line.

Reply to
Robert Baer

Eventide have several products that include this. Check out

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Cheers

ian

Reply to
Ian Bell

Do radio stations use a tape loop or a "drum"? Seems a tape loop would soon wear out. ...Jim Thompson

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| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

Are radio stations still analog tese days?

A delay in the digital world is just a big FIFO. All it takes is enough memory and a couple of pointers.

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These are my opinions, not necessarily my employer's.  I hate spam.
Reply to
Hal Murray

They did, back in the '60s, and yes, they wore out in under a week. the heads only lasted a few months to a year, depending on whether they were cleaned every eight hours, or daily.

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Greed is the root of all eBay.
Reply to
Michael A. Terrell

It is not quite so simple if you need a delay with the resolution of a fraction of a sample.

Vladimir Vassilevsky DSP and Mixed Signal Design Consultant

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Reply to
Vladimir Vassilevsky

Sure it is. Just grab more samples. Memory is cheap.

Reply to
krw

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=A0 =A0 ...Jim Thompson

=A0 =A0| =A0 =A0mens =A0 =A0 |

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no they haven't used tape for years...

the digital boxes are slick

when someone says something nasty on a call in show..they press the kill button, instead of having to fill the dead air, the more sophisticated digital delay boxes just jump ahead a few seconds and then gradually build up the delay again so the listener never evens knows that the kill button was needed...

Mark

Reply to
Mark

The tape head wears out long before the tape itself (observed fact).

Reply to
Robert Baer

..point with my digit (finger)..

Reply to
Robert Baer

Many thanks to all those who had something useful to offer in response to my posting.

I'm looking for something that is single channel (Mono.) entirely non-mechanical, and able to operate from cold completely stand-alone, probably with 24-bit resolution and at least 48KHz sampling rate.

I can't risk anything using analogue boards in a standard PC running a custom program that needs to be booted up manually and is then liable to 'crash' at the most awkward times.

I've followed up some of the suggestions made, done some more Google searching, and at the moment I rather like the capabilities (but not the price) of this device which works in association with a dedicated controller:

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I'll keep looking in case I can find a cheaper solution. Thanks again to those people who took the trouble to respond.

- Dave

--
David C.Chapman - (dcchapman@minda.co.uk)
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Reply to
David Chapman

On a sunny day (Tue, 19 Jan 2010 09:26:42 +0000) it happened David Chapman wrote in :

It does not *have* to run MS windows. And it is easy to add a startup script in Linux.

Reply to
Jan Panteltje 

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I couldn't find the price.  

How much do they want for it? 

JF
Reply to
John Fields

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