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Conference napalm::commusic_v1

Title:* * Computer Music, MIDI, and Related Topics * *
Notice:Conference has been write-locked. Use new version.
Moderator:DYPSS1::SCHAFER
Created:Thu Feb 20 1986
Last Modified:Mon Aug 29 1994
Last Successful Update:Fri Jun 06 1997
Number of topics:2852
Total number of notes:33157

2382.0. "Analog delay in miles?" by VFOVAX::BELL () Fri Jun 29 1990 20:35

    Hey guys, I gotta question.  If, for most instrument ranges/timbres, 
    a useful flanger is 5-12 ms delay (right?), how much wire is that???
    
    :^D   
    
    I want to play around with some stuff (I'm bored) and was wondering, 
    if I split a signal into two lines (one short and one long) how long
    would it have to be?  Miles?  I also think that a real flange has to
    do with re-introducing the signal to the delay or vice versa if I
    remember correctly, but just for kicks?  
    
    If there's any other real easy Saturday bummin' way to do a simple,
    short analog delay, please let me know.
    
    Thanks,
    
    Mike
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2382.1I'll bet I blew this somewhere...DCSVAX::COTEYou make the knife feel good...Fri Jun 29 1990 20:406
    Assuming 186,000 miles per second (a bit on the optimistic side), you'd
    need 186 miles of wire for every millisecond of delay.
    
    Even at 1/2 that speed it's a goodly amount of wire....
    
    Edd
2382.2Yes, I did mean thnaks!VFOVAX::BELLFri Jun 29 1990 20:577
    I think I answered my own question.  At the speed of light, I would
    need 931,412 miles of wire for 5 ms.  So, does anybody know of an easy
    analog delay?  Without buying a DOD pedal?
    
    Thnaks,
    
    Mike
2382.3pay as you go?MIZZOU::SHERMANECADSR::SHERMAN 235-8176, 223-3326Fri Jun 29 1990 20:587
    Of course, if you have a buddy in Taiwan that's willing to answer the
    phone, you can have an analog delay, albeit with low bandwidth, by
    hooking up to the phone.  You can have it now and it won't cost but a
    few bucks for the first few minutes.  Great for studio work.  Not so
    hot live.  Not variable.  But ...
    
    Steve
2382.4tape machinesMILKWY::JANZENTom 2285421FXO/28 MSI ECL IC QualMon Jul 02 1990 04:416
    An old 1/4"tape recorder that can monitor the play heads while
    recording will play the tape a fraction of a second (dpending on tape
    speed) after recording.  I've done that, and then play the tape on
    another tape recorder 20 feet away, getting about 30 seconds of delay. 
    Paul Dresher has done that.
    Tom
2382.5go beyond Analog: Airwaves!NSDC::SCHILLINGMon Jul 02 1990 12:478
    ...or why not, just for the heck of it, go primitive and get long
    tubes of different length, somehow, from somewhere and hook them up in 
    some way...surely a way to get more variance and unpredictability.
    If you wanna get really wild, get a hold of a local sewer system ;^)
    Would be more of a team effort, though, rather than a Sunday workbench
    project.
    
    paul
2382.6sleazy flangerAQUA::GRUNDMANNBill DTN 297-7531Mon Jul 02 1990 12:5111
    A neat technique for bogus flanging:
    
    Run the source signal through an amp. Take two microphones and flip the
    phase on one of them. Mix the mics at equal volumes and listen to the
    mix on headphones. Now hold the mics in front of the amp's speaker and
    vary the relative distance between the each mic and the speaker. Each
    foot of differential equals about 1 millisecond (?).
    
    Can't flip the phase of one mic? If you have a truly bogus amp, the
    back is open, put one mic back there, and move around the other mic in
    front of the amp!
2382.7SALSA::MOELLERTue Jul 03 1990 17:3910
>    <<< Note 2382.4 by MILKWY::JANZEN "Tom 2285421FXO/28 MSI ECL IC Qual" >>>
>                               -< tape machines >-
>    An old 1/4"tape recorder that can monitor the play heads while
>    recording will play the tape a fraction of a second (dpending on tape
>    speed) after recording.  I've done that, and then play the tape on
>    another tape recorder 20 feet away, getting about 30 seconds of delay. 
    
    I did this lots back in 1969 and '70, when I was only 4.
    
    karl
2382.8early tweeter 8)NSDC::SCHILLINGThu Jul 05 1990 11:554
>    I did this lots back in 1969 and '70, when I was only 4.
 Hey, me too, in '72 when I was five! When my dad let me yell into the
    microphone and suddenly lots of mes would yell back at me.
    paul
2382.9Recreational Rack EffectsAQUA::ROSTGet up and get hip to the tripThu Jul 05 1990 13:316
    These days we have cooler toys for kids, though....
    
    My 3 and 5 year old like singing into my harmonizer, especially when
    it's set up with regeneration....
    
    							Brian
2382.10MILKWY::JANZENTom 2285421FXO/28 MicrowaveLogicQualThu Jul 05 1990 16:027
>       <<< Note 2382.9 by AQUA::ROST "Get up and get hip to the trip" >>>
>...
>    My 3 and 5 year old like singing into my harmonizer, especially when
>    it's set up with regeneration....
    My nieces sang into the pitch shift patch of my SPX90 
    when they were 2 and 4.
    Tom