{"id":2023,"date":"2021-09-09T08:09:46","date_gmt":"2021-09-09T08:09:46","guid":{"rendered":"https:\/\/mixxed.com\/blog\/?p=2023"},"modified":"2022-09-22T11:35:41","modified_gmt":"2022-09-22T11:35:41","slug":"what-is-a-delay-effect-in-music","status":"publish","type":"post","link":"https:\/\/create.routenote.com\/blog\/what-is-a-delay-effect-in-music\/","title":{"rendered":"What is a Delay Effect in Music?"},"content":{"rendered":"\n

Delay is a time-based effect where audio is fed into the delay unit or plugin and played back multiple times at a rate set by you, the engineer.<\/h2>\n\n\n\n

With reverb<\/a><\/strong>, the signal is repeated many times in less than 50ms and that’s why we hear it as one mush of the sound. If the sound source was repeated at a slower rate than 50ms, we would hear it as an echo. And that, my friend, would be a delay effect.<\/p>\n\n\n\n

What Does Delay Do?<\/h3>\n\n\n\n

Like reverb<\/a><\/strong>, delay creates a sense of depth in our music. We can also use it to add further tones<\/a><\/strong>, in a dissimilar way to distortion<\/a><\/strong>, and it’s widely used in many popular genres and electronic music. <\/p>\n\n\n\n

In delay, the signal can echo multiple times and we can refeed the delayed signal back into the delay processor again to create more and more feedback. In turn, this creates a gradually delaying echo effect!<\/p>\n\n\n\n

From Analog to Digital: A History of Delay Circuits<\/h3>\n\n\n\n

Analog Tape Delay<\/h4>\n\n\n\n

Back in time to the analog days, engineers used tape machines to manually create a delay effect. First happening in the 1950s, engineers used a reel to reel tape recorder with the output plugged into their mixing desk, and the output of the mixing desk plugged into the input of the tape recorder. <\/p>\n\n\n\n

The source of the audio was plugged into another input channel of the mixing desk and fed into the aux channel of the tape machine, which relayed the audio back into the mixing desk… and created tape delay! To control the delayed echo, the engineer could shorten or lengthen the loop of tape and adjusting the read-to-write heads.<\/p>\n\n\n\n

Now that they had the technique, next came the dedicated hardware like the Roland RE-201<\/a><\/strong> Space Echo Tape Delay. These hardware units hit the scene, and more or less followed the same process. <\/p>\n\n\n\n

The original signal is split like in feedforward compressors<\/a><\/strong>. The original (dry) signal is sent directly to the output of the pedal, and the second (wet) signal is delayed by circuitry and then sent to the output to create the first repetition. A portion of the delayed signal is sent back to the input of the pedal and the process starts again, and again, and again!<\/p>\n\n\n\n

\"\"
Basic analog circuit for delay process, Source: Anasounds<\/a><\/strong><\/figcaption><\/figure><\/div>\n\n\n\n

For further effects, individual processing to any of the repetitions such as filtering could be added to give it a unique characteristic, as well as modulation to further replicate the original tape delay! <\/p>\n\n\n\n

BBD Delay<\/h5>\n\n\n\n

Along came the 70s (well, 1969 to be exact) and they brought the long road to digital with them. <\/p>\n\n\n\n

BBD, bucket brigade device, was the first technology developed that allowed for compact delay devices like delay pedals. A BBD is a hardware chip that delays the signal that it receives from an input.<\/p>\n\n\n\n

BBD devices aren’t digital devices because they require external analog processing before the signal enters the BBD circuit. This allows the solid state<\/a><\/strong> BBD to work with the signal. A compressor and different filters to prevent aliasing<\/a><\/strong> are used before the signal enters the BBD, and filtering is again used when the signal leaves the BBD to reconstruct the signal. As well as these filters, an expander is also used to boost the signals’ dynamics. <\/p>\n\n\n\n

\"\"
BBD circuit, Source: Anasounds<\/a><\/strong><\/figcaption><\/figure><\/div>\n\n\n\n

As you can see in the above diagram, a clock is used to control the delay of the signal, and inside the BBD are multiple switches that control the pathway of the signal. <\/p>\n\n\n\n

So, because BBD devices don’t use processors with coding that handles all of these delay processes, it’s argued that these devices are analog and not digital.<\/p>\n\n\n\n

The famous analogy used to describe the process of a BBD circuit is firefighters transporting water.<\/p>\n\n\n\n

One firefighter fills up a bucket with water. They then fill up the next firefighters’ bucket, and they, in turn, fill up the next firefighters’ bucket. This process repeats until all firefighters have a full bucket of water.<\/p>\n\n\n\n

This process will inevitably lead to spillage, and this is also true in BBD circuits. Information gets lost as the signal passes through each gate, and these losses add white noise<\/a><\/strong> to the signal. This noise prevents clean repetitions of the original signal. However, rather than be a flaw like it would be with quantisation<\/a><\/strong> when reducing bit depth<\/a><\/strong>, this noise adds a unique characteristic and tone<\/a><\/strong> that BBD delays are known for. <\/p>\n\n\n\n

\"\"
BBD Chip, Source: RS<\/a><\/strong><\/figcaption><\/figure><\/div>\n\n\n\n

PT2399 Chip<\/h4>\n\n\n\n

Itching ever closer to fully digital is the PT2399 chip. This chip, however still required external processing – so it was still an analog process. There is a digital process inside this chip, though! <\/p>\n\n\n\n

The digital process is only used to control the delay itself. Again, the signal is split in two and the dry is sent straight to the output and the second signal is sent into the delay chip. The analog processes that occur are much the same as in BBD delays, like filtering.<\/p>\n\n\n\n

If you’re handy with electronics, this was and is great. With BBD and all other analog hardware, you are free to fully customise what happens. You can add tubes <\/a><\/strong>to compressors, or clipping<\/a><\/strong> stages to your delay unit with a BBD or PT2399 chip inside!<\/p>\n\n\n\n

\"\"
Comparison of the processes undertaken by the different delay processors, Source: Anasound<\/a><\/strong><\/figcaption><\/figure><\/div>\n\n\n\n

In the image above, you can see that the PT2399 handles the delay process digitally but analog processes handle everything else from signal conversion<\/a><\/strong> to filtering. Like DSP chips, the PT2399 use a memory bank to store the sampled audio signal that it will relay as delay! The BBD chip, as you can also see, is a fully analog process that does not use a digital memory bank to undergo the delay process.<\/p>\n\n\n\n

\"\"
PT2399 chip by Princetown Technology Corp, Source: ElectroSmash<\/a><\/strong><\/figcaption><\/figure><\/div>\n\n\n\n

The Rise of Digital: The DSP Chip<\/h4>\n\n\n\n

DSP, digital signal processing, chips are the fully digital solution (if the name didn’t give it away)!<\/p>\n\n\n\n

All processing, excluding ADC to DAC conversions, are handled solely by the processor with 1s and 0s. This binary code is controlled by algorithms inside the chip that allows for much more complex effects!<\/p>\n\n\n\n

A drawback with digital processing, rather than using control voltages<\/a><\/strong> like analog circuitry, is that there will be latency on the original signal and reduced dynamics<\/a><\/strong>. The latency will only ever be marginal if it occurs, and the dynamics can be restored with the proper processing (upwards compression<\/a><\/strong>).<\/p>\n\n\n\n

As well as digital processors in dedicated delay hardware, we also have software that emulates the effect of hardware – and we call these delay plugins. <\/p>\n\n\n\n

If you’re looking to jump in and start using delay effects right away, Mixxed<\/a><\/strong> has thousands of samples for you to choose from and throw into your delay plugin!<\/p>\n","protected":false},"excerpt":{"rendered":"

Delay is a time-based effect where audio is fed into the delay unit or plugin and played back multiple times at a rate set by you, the engineer. With reverb, the signal is repeated many times in less than 50ms and that’s why we hear it as one mush of the sound. If the sound source was repeated at a slower rate than 50ms, we would hear it as an echo. And that, my friend, would be a delay effect. What Does Delay Do? Like reverb, delay creates a sense of depth in our music. We can also use it…<\/p>\n","protected":false},"author":3,"featured_media":2037,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[20,18,19,17],"tags":[570,571,573,575,574,569,572],"class_list":["post-2023","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-community","category-music-money","category-music-creation-tools","category-music-sampling","tag-delay-audio-effect","tag-delay-effect-for-music-production","tag-delay-effect-in-music","tag-how-to-use-delay-in-music","tag-music-delay-effect","tag-what-is-delay-effect-in-music","tag-what-is-delay-in-music-production"],"acf":[],"yoast_head":"\nWhat is a Delay Effect in Music? - RouteNote Create Blog<\/title>\n<meta name=\"description\" content=\"Today we're covering the history of analog delay circuits, what separates delay from reverb!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/create.routenote.com\/blog\/what-is-a-delay-effect-in-music\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is a Delay Effect in Music? 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