A colourful line drawing of a microphone, labeled “podcast”. Source: Image by , CC BY 2.0

A podcast is a series of episodes made of audio voice recordings that someone can listen to either by streaming or downloading the episode.

Forms of Podcasting

There are many forms of podcasting, and you can mix up styles from episode to episode. Generally, the types fall into two categories: talking about a topic, or telling a story. When discussing a topic, you could be speaking on your own, with a co-host, or a guest. When telling a story, you could be telling a fiction or nonfiction story. You don’t have to create a series of podcasts – it’s perfectly fine to create a single piece!

Below are some pros and cons to the most common podcasting forms:

Interview Format
The Monologue
With a Co-Host
Telling a Story

The Three Steps of Podcast Creation:

  • Pre-production: Planning the show.
  • Production: Recording the voices.
  • Post-production: Editing the voices and adding in other sounds.

Pre-production: Planning the Podcast

Pre-production is all about knowing what you’ll be talking about. It helps avoid rambling, and encourages coherent, captivating content. Think about your own professors: some of them might be really good at rambling and tangents, but others are not. If you, like most humans, aren’t great at rambling, you’re better off creating some sort of script.

All Forms
Interviews or Co-hosts
Telling a Story

Production

  • Record yourself using a phone or microphone.
  • Make sure you pick a place with minimal outside noises. Never record outside unless it is intended for a specific purpose and you want intentional background noise.
  • Keep a consistent distance from the microphone to avoid “popping Ps” and try not to vary your volume too much. Speak slightly louder than you normally would.
    • A “popping P” refers to the tendency for us to pronounce words that start with a P louder than normal. This is caused by blowing air when making the P sound.
    • People tend to start words or sentences strong, especially after a pause. Try to limit this.
  • When interviewing someone, nod instead of saying “Yes”. This will convey your understanding without causing issues with the audio file.
  • If you have a co-host or guest, it might be more practical for each person to record their own audio using their own phone. You’ll wind up with two audio files that you’ll have to combine during the editing phase, but it might be easier than crowding around a microphone or figuring out how to connect two microphones to one recording device.

Tip: Pauses

Pauses are your best friend when editing. If you take a breath to psych yourself up for a line, take a 1-2 second pause. This will make removing the breath sound much easier later. If you mess up a line, take a pause, and redo that line. Continue as normal. Giving yourself the 1-2 seconds of silence makes your editing life much easier.

Post-Production

The Waveform

The waveform is a visual representation of an audio file. The X-axis (moving left to right) indicates time. The Y-axis (top to bottom) indicates the amplitude, which is essentially volume.

Watch The Waveform (30 seconds) on YouTube

Video source: The Liberated Learner. (2021, December 1). The waveform [Video]. YouTube. https://youtu.be/NxoMlRGC3Ns

There is a lot more science and complexity to a waveform, but for our purposes, we only need to understand it as a visualization of our audio recordings. Our main tasks will be chopping out bad clips, adjusting volume, and removing breathing noises.

Podcast Editing

The Two Main Techniques:

A cut and a fade is not just to make your hair look good.

  • Cut – A clean transition from one piece of audio to the next
  • Fade – A gradual increase or decrease of the volume of an audio track. Think about how a voice might fade out near the end of a clip, or fade in at the start.

The Goals:

Our main goal is to take a bunch of clips and edit them so that they sound like one, uninterrupted clip. This is called “Continuity Editing”.

This can refer to small-level, such as keeping the volume the same across the entire piece, and ensuring that cuts are done in between words and sound clean. Continuity editing can also refer to bigger picture things, such as cutting off tangents, and adding in important context. When someone says, “Oh, I forgot to add…” we might want to put that where it should have gone.

Here, the value of pauses should be clear. By pausing in between words and sentences, we have more room in the waveform to cut and arrange clips. If we speak quickly, there would be fewer places to make clean cuts.

Tip: Editing

Continuity editing: Editing audio clips to create a linear and consistent progression of content. This means editing out tangents, sentences that don’t quite fit, and generally making sure that the final result sounds like one long clip, rather than a series of combined clips.

Another important goal is to get rid of Popping Ps. They are inevitable and take practice to change during the production phase. Speakers should always be striving to limit the Popping Ps and speak at with consistent volume and tone.

Sometimes, they are unavoidable or you don’t notice. There are many strategies to getting rid of that “pop” sound. One is to fade in the P sound, another is to reduce the volume of just the P sound. In the mixer, you’ll have to find the “P” sound and isolate it. It should stand out.

Popping P’s – Example

When speaking into a microphone, there’s sometimes a strong breath of air that seems to explode into the microphone.

These plosives are worse on words with p’s and b’s. To avoid, position the mic at an angle instead of directly in front of the mouth, back away a little bit from the mic and use a pop filter or windscreen over the mic.

Popping P’s – Text version of example

In this brief audio clip (2 seconds) the creator enunciates the words “Popping P’s” and sound distortion is heard in the audio recording right at the point that the letter “P” is pronounced.

Example source: Audio clip from Liberated Learners, CC BY-NC 4.0. Introductory text from Tools for Podcasting , CC BY 4.0

Audio Editing Functions

Inside an audio editing program, there are many functions that you can use to reach the goal of good continuity editing. While these functions are consistent across most (if not all) programs, how they are accessed will differ. Check out the program specific tutorials to get a feel for the layout. Below are some of the most common functions you’ll use:

  • Select – This lets you select a part of an audio track. Once selected, you can move it, cut it, and manipulate it.
  • Cut – This will split the audio clip into parts, allowing you to insert something in between, move a piece somewhere else, or delete a part.
    • A form of cut that removes the beginning or end of a clip is called a “Trim”. Basically, trimming the ends. Maybe you took a breath before you started, or looked for the stop button on your phone when you were done. In either case, you might want to get rid of that little bit at the start or end.
  • Merge – This function takes two pieces of audio and merges them into one. Just like a cut takes a clip and turns it into two, a merge takes two and turns it into one. This is useful if you want to move this newly merged piece somewhere else, or apply an effect to the entire clip (to save yourself from doing it twice).
  • Amplify – The Amplify effect will either increase or decrease the volume of a selection in decibels, the measurement of sound.
  • Fade – Another common effect, this will fade in (increasing) or fade out (decreasing) a clip.
    • A cross fade is a type of fade that involves something fading in while something else fades out. The point is to have a seamless transition between two clips. An example would be introduction music that fades out as the speaker fades in.

Tracks

A “Track” refers to a recording of sound. If you were to record yourself speaking and load it into a computer, you would have one track. If you and a friend were each recording their own voice in a conversation, this would mean two tracks.

Audio programs allow for multiple tracks, and will play them all at the same time. Best practices say that we should separate different tracks. This way, we can change the background music speed or volume much easier, without changing anything else.

If we were to put everything on one track, things would get very messy very quickly.

Multiple tracks help us organize the audio files that we are using. Put the main host or narrator on the main track. Put background music on another, sound effects on another, and other guests/actors on their own track. The end result is the same, but it becomes much easier to find what you need and visually see the pieces that go into the final product.

Editing Software to Use

There are plenty of free audio editors out there. Audacity is a very popular choice. It is fairly easy to use and has an extensive suite of tools. There is a lot of support and resources for it as well, making it simple to find the solution to whatever problem you’re having.

It is worth mentioning that, in 2021, Audacity changed their privacy policy in response to allegations that they were selling user data. If this is something that bothers you, there are plenty of other options to check out.

Dig Deeper

There are many options for editing audio and getting free sound effects to use. See below for some stuff to check out.

Ocenaudio
GarageBand
Audio Cutter

You might also find something on your phone that works for you. Phone apps tend to be less powerful and more clunky to use (smaller screen, using fingers instead of a mouse or trackpad), but if you’re only doing some light editing (trimming, minimal cutting, juggling only a couple tracks), it might work well for you.

Where to get free sound effects

Attribution & References

Except where otherwise noted, this page is adapted from Podcasting In Liberated Learners by Terry Greene et al., CC BY-NC 4.0. / Streamlined content and removed paid access software suggestions, added links to reputable sites for app downloads, added graphic.

License

Icon for the Creative Commons Attribution-NonCommercial 4.0 International License

DRAFT - Multimedia Communications Copyright © by Marie Rutherford is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, except where otherwise noted.

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