How to do artificial double tracking (ADT) on iPad

It is one the splendid effects used by Sir George Martin on Beatles. For example A Day in the Life - John Lennon.


Other example Time - Allan Parsons


Ordinary double tracking is singing again the same twice. Example, Its my party - Leslie Gore


Artificial double tracking is adding a delayed version of the original waveform (vocal). Like slap back echo.


We create a copy on GarageBand on a track below.


Then shift it in time by dragging by hand.


Resolution of steps can be adjusted in the way described in the following euroelectron post.


Another brilliant example of ADT is Falling from Grace - The Gentle Waves. It may have Varispeed too, the famous ABBA effect to make the voice sound so fresh.
https://m.youtube.com/watch?v=7ZWC3Zc7TEM


Sometimes it is difficult to discriminate which is double tracking and which is ADT. This post may have errors.


Another so beautiful example is Frozen - Madonna


An echo chamber automatically creates this feel as there is an acoustic delay from the speaker to the microphone, the sound wave is traveling at the relative slow speed of sound in air. Similarly with EMT plates the sound traveling at the speed the waves travels at the uniformly tensioned steel plate fby producer Phil Ramone as a fine example:
This Girl's in Love (Dionne Warwick) - Bacharach, Davis
https://m.youtube.com/watch?v=Gd2Q8VCk9co


ADT invented at Abbey Road Studios by Pete Townsand is more involved. It is actually 2 delays from 2 different tape recorders combined together. The delay of the https://m.youtube.com/watch?v=Gd2Q8VCk9co.


Another example of brilliant use of the above effects is
Society's Child - Janis Ian
https://m.youtube.com/watch?v=ABUmZvzGHVc


ADT invented at Abbey Road Studios by Pete Townshend is more involved. It is 2 delays from 2 different tape recorders combined or added together. The delay of the second machine is varied. So the 2nd signal can take all values from past to future.


It may be possible to do this using two iPads with GarageBand. In this way many more delay values can be obtained including very short delay.