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Cheapest solution for fixed delay ?
Cheapest solution for fixed delay ?
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Old 3rd December 2019, 04:02 PM   #1
papasteack is offline papasteack  France
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Default Cheapest solution for fixed delay ?

Hi, there's a lot of tool and dsp available. Do you know something let say < 40 , to just simply add a fixed delay ~5 ms (not shure/wondom board).
Thanks,
Damien
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Old Yesterday, 01:53 PM   #2
s3tup is offline s3tup
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Lipsync ics for i2s, if you need spdif, add single wm8804(5) and use it both as input and output.
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Old Yesterday, 07:17 PM   #3
s3tup is offline s3tup
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Or 1km spool of wire
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Old Yesterday, 09:22 PM   #4
pelanj is online now pelanj  Czech Republic
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It costs slightly more (70 Eur), but you have 4 channels of delay (and other DSP effects) - the Thomann the t.racks dsp mini 4x4. I use two as digital 4way stereo crossover, delay and EQ. It is a small set-and-forget box.
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Old Yesterday, 10:50 PM   #5
MarcelvdG is offline MarcelvdG  Netherlands
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Quote:
Originally Posted by s3tup View Post
Or 1km spool of wire
Make that 1000 km for 5 ms, assuming a dielectric constant of about 2.25. That won't be cheap...
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Old Yesterday, 11:49 PM   #6
Jim the Oldbie is offline Jim the Oldbie  United States
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Many years ago, I was answering a customer's questions about a sound system install in a gymnasium. Among them was a concern for how to properly store the excess wiring to one of the the 2 speaker enclosures, which was about 75' closer to the equipment rack than the other. "If this is a permanent install, it'd be better to just trim it to the correct length," I explained. "Well, you can't do that, the sound will come out sooner!" he declared with a note of contempt.

I took a deep breath and attempted to explain the difference between the speed of sound, and electrical current flow (which is somewhat faster I'm told), but he wasn't having it. "I guess I'll just coil it up behind the rack," he decided.

The thing that stuck in my craw was: The guy was technically correct.
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Old Today, 02:06 AM   #7
s3tup is offline s3tup
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Quote:
Originally Posted by MarcelvdG View Post
Make that 1000 km for 5 ms, assuming a dielectric constant of about 2.25. That won't be cheap...
Whoops my bad, i somehow misplaced these 3 zeroes in my calculations

It's possible to delay the signal with a simple low-pass filter... Technically...

Lipsync ICs, a-la TPA5050/1. One of these could be programmed with resistors (no need for mcu/i2c).
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Old Today, 02:20 AM   #8
Mark Tillotson is offline Mark Tillotson
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Quote:
Originally Posted by Jim the Oldbie View Post
The thing that stuck in my craw was: The guy was technically correct.
But not for the delay reason, the attenuation difference between channels would be measurable with 75' cable difference, and perhaps the difference in damping factor would manifest itself too in bass resonances.
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