Time-based effects come in various shapes and sizes. You may be looking to thicken the sounds in your mixes with extra stereo width, give the impression that multiple players are contributing to a specific instrumental track, or even reinforce vocals with subtle or very bold echoes.
Producers have long discovered the power of techniques that manipulate time. The technique that often comes to mind with time-based effects is delay, which, as its name suggests, records or buffers sound, holding it for a moment before playing it back. This predates pop music and was a popular method with early 20th-century music concrete pioneers like Schaeffer and Stockhausen. They played around with these techniques to explore their capabilities.
Tape delay involves recording a section of audio to a loop of tape and manipulating the record and read heads of the tape machine to feed a signal to a loop of tape, then play it repeatedly. By changing the length of the tape loop or controlling the playback speed, a range of different tones can be produced. These tones might include characteristic artifacts such as hiss and pitch wobble, a common feature of tape-based delays.
It didn't take long before these pioneering techniques reached the ears of pop music producers, who embraced the potential of delay effects. They used everything from short slap-back delay effects for vocals to more interesting long rhythmic delays.
Rather than commandeering entire reel-to-reel tape machines to produce echo treatments, commercial echo units became available, dedicated to producing tape-like effects. This started most classically with the Echoplex in 1959, a unit designed by Mike Battle, which set the standard for echo treatments in the following decade.
The Roland Space Echo followed in 1974, featuring three separate tape heads and variable tape speed playback for multiple delay and even reverb effects. By manipulating tape speed and signal feedback, it became possible to produce pitch-based effects and regenerating audio signals, techniques still heard in pop music, particularly in dub.
In the 1970s, the first non-tape echo machines were released. Bucket brigade delays were solid-state devices using Panasonic chips to briefly delay input signals. These delays were warm, broad, and darker, made famous by Boss's DMM2 stompbox.
The stage of using digital delays then began as electronic components became cheaper. Manufacturers like Eventide and AMS offered pioneering echoes with longer delay times before others like Lexicon, Roland, and TC Electronic reinvented audio fidelity and flexibility from a delay perspective. For studio-based producers and guitar pedal designers, there were innovations like the Electro-Harmonix Memory Man, a seminal example of delay-based effects.
If you've wondered how the cascading arpeggiated guitars from U2 are produced, look no further than the Korg SDD-3000 digital delay, which creates amazing syncopated rhythms.
Digital delays sample or record audio signals to memory before playback. We've become familiar with tools and techniques within plugin-based delay effects in digital audio workstations today. Parameters such as feedback, which controls the number of echoes, or EQ controls, which let you change the tonal range, are particularly important.
You might also emulate characteristic tape-based effects like increasing hiss or controlling wow and flutter effects, introducing pitch wobble to bring the essence of tape-based effects to modern productions.
Dedicated hardware delays, like Universal Audio's Starlight Guitar Pedal and Ryman's Timeline, are popular choices for out-of-the-box processing, enjoying a renaissance now.
But time-based effects can go much further. Techniques like chorus effects that briefly delay a signal before playing it a few milliseconds later, combined with a low-frequency oscillator, can make sounds thicker, richer, and lusher. Phasing and flanging are extensions of this, offering sweeping, lush sounds associated with seventies disco or producing interesting overtones, a popular guitar technique.
Synth users and instruments like Roland's Juno-60 offer classic chorus variations. Techniques like these are back in favor, in part due to the "Stranger Things" soundtrack, which pays homage to doubling techniques.
A notable mention must go to the multi-generational Eventide Harmonizer, setting the tone for time-based effects since 1975, and its successor, the classic H-3000 in 1986. This multi-effects processor combines rich sonics with harmonizing delay, pitch shifting, and more, leaving an indelible mark on the recorded music industry.
Understanding the history of delay and other time-based effects is essential. It's like building on the shoulders of giants. These effects are an incredible playground for experimentation in your productions.
So before diving into examples of how delay and doubling effects can enhance your work, let's have a parameter tour to really explore a delay plugin in depth, helping you understand exactly what's available to you.