Echo effect to flow with beat/bpms of beat?

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PMJ

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If I know the bpms of a beat, is there a formula that can be used when I adjust the echo's effect settings so the echo will match and be in time with the beat? I can play it by ear, but I jus looking for a short cut..

Thanks, PM
 
60,000 / bpm = length of quarter note in milliseconds.

G.
 
Yeah, like Rami I use a software delay calc. When mixing I keep it open all the time and refer to it frequently. I not only sync delays to the tempo, but also sometimes tailor the reverb to be in tempo with the beat as well. Or a division or multiple of the beat.
 
AnalogX Delay Time Calculator shows that duration of a quater note at a tempo 120 bpm is 125 ms, while using SouthSIDE Glen's formula (and many toher calculator on a web) shows that a quater note should be 500 ms. What about time signature? note duration should differ with 4/4 and 6/4. Sad that AnalogX Delay Time Calculator does not have option to set time signature. i gues default is 1/4
 
sunnydyz said:
What about time signature? note duration should differ with 4/4 and 6/4.
Click to expand...
The key is that the denominator in the time signature indicates the note type on which the BPM is based, and therefore the note type for which the formula given earlier is calculating.

As long as the signature is x/4, one beat = one quarter note. A 100bpm song at 4/4 and at 6/4 has the exact same lengh of quarter note. The fact that in 6/4 time one is playing 6 notes per measure does not change that.

If one wants to calculate the length of that "sixth-note" instead of a quarter note, an extra calculation step has to be taken. In this case the calcualtion for a quarter note then has to be divided by six-fourths (or simpler put, divided by 1.5.)

If, OTOH, the time signature is, say, 6/8, then one beat = one 8th note and the standard formula based upon BPM yields the lengh of an eighth note, not a quarter note. And the length of that sixth note would be the standard formula divided by 6/8 (or multiplied by 1.33.)

I think all the above is correct. It does get confusing after a while. Someone please correct me if I messed up somewhere.

G.
 
Exactly. The length of a quarter note doesn't change because of the time signature.
 
maybe you are right. I gues you are :). but what do AnalogX Delay Time Calculator shows? the quater note at 120 bpm should be 500 ms long, but prog, shows 125 and full note is 500 ms. do the program is buggy? Its just more easier to use some software to do calculations, but i need to understand how it works. respect
 
125ms should be a 16th note at 120 bpm. Are you sure your reading the display of AnalogX correctly?

But oddly enough, on the AnalogX web page, the values displayed in the screenshot do indeed look incorrect.

http://www.analogx.com/CONTENTS/download/audio/delay.htm

There are a ton of digital delay calculators out there, I suggest you simply download a different one and use that.
 
I'm not sure if they are incorrect if they use the wrong terminology. If you enter 60bpm, it says a "WHOLE" is 1000ms. It should be a quarter note, not a whole note. But what they might mean is that a "whole beat" is 1000bpm, "half a beat" is 500ms, etc....Maybe English isn't their first language or something??? So, they're incorrect, but it still makes sense.
 
A "quarter" is standard for a quarter not, not a quarter of a beat. A "16th" is standard for a 16th note. Unless you get into "semi-quavers" and all that as an alternate description of note values, everyone calls a note value of one beat a quarter note, not a "whole note".
 
SonicAlbert said:
A "quarter" is standard for a quarter not, not a quarter of a beat. A "16th" is standard for a 16th note. Unless you get into "semi-quavers" and all that as an alternate description of note values, everyone calls a note value of one beat a quarter note, not a "whole note".
Click to expand...
I realize that. I was trying to understand what THEY were thinking. I wasn't saying it's right, but I have been using their calculator and was able to make sense of it regardless of their inaccuracy. To nit pick, they don't say "WHole NOTE". They just say "Whole". So my twisted logic was that they might mean "A WHOLE 60bpm interval" is 1000ms. I know it's wrong.
 
also quite a few plugins will latch on to whatever tempo you've set yer session to be in. at least in PT it's easy to do, and in Logic and Cubase as well i believe..
 
It doesn't take very long before one memorizes by pure osmosis the quarter notes at many standard BPMs like 100, 120 and so forth. Even if not by osmosis, just by sitting down with the numbers for a half hour and memorizing them; we're only taking maybe 3 or 4 different numbers here.

From there it's a simple division or multiplication by two or four and one has everything from a whole note down to a 16th for three or four standard BPMs without needing a calculator or even a pencil and paper. It's not rocket surgery. A calculator really only comes in handy IMHO for weird signatures, and many conversion apps won't even do those.

The formula - even if one adds in the extra factor of funky time signature - is so friggin' simple that one can write their own point and click app in an hour, two if you want to make it pretty. I'm tempted to do one myself. Maybe if there's no baseball game tonight... ;)

G.
 
sunnydyz said:
i've made my own calc. check it out :)
http://195.14.172.51/sunnydyz/BPM2ms.zip
p.s. this url will be active few days, so then you're reading this message it may not work
Click to expand...
Sunny,

Hey, nice job. Thanks for saving me the work :) Great idea doing it as an actionscript executable also.

I'm not sure just what I'm looking at with some of those values, though. Just what are the three columns (".", blank, and "3")? and what do the bracketed numbers signify?

G.
 
first column doted notes, second "normal", and last tripllets. in "[]" is notes length in hz. i saw some plug (some chorus plug if i remember right) where delay duration was in hz. so added length in hz to, thougth it is useful. gues you're right, i'll update calc tomorrow by naming colums. it should save place and it will definitely be clearer.
 
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