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DECP 05: Developing e-Content

e-Learning in broader way


Recording audio - Considering Recording Conditions

When making a recording you need to remember the microphone will pick up most of the sound made around it during that time. Here are some tips to consider:

  1. Background noise, the recording will pick up other sounds made in the room including other people talking, machine noise and telephone rings! To avoid this it is best to record in a quiet and secluded room.
  1. Microphone position, the microphone doesn’t have to be to close to your mouth, as it tends to pick up unwanted noises like inhaling and exhaling, plus the recording tends to be loud if the microphone is to close. However, when making a recording try a keep the microphone at a constant distance from your mouth because varying the distance changes the volume of the recording. This is helped by the use of a headset.
  1. Try to do all the recording of a Podcast on the same computer as different machines have different ambient sounds which will vary throughout the recording if not done on the same machine.

Starting Recording

Before you start recording just do are a few last minute final checks,

(i) Check your microphone is plugged in!

(ii) Input is set to microphone and finally

(iii) Sample rate is set a 44100Hz, this can be altered as we will discuss later, but this comes recommended.

Then press record and start speaking. As you talk, you will know it is working because a sound wave trace of you voice is produced. The other thing you may notice is meter toolbar will move to the sound of your voice, and finally the Timer Positions at the bottom of the screen will be counting.

Trimming audio

For Trimming Audio from the recording, we need to move along with cursor and highlights the section. This can be done my left clicking the mouse at the start of the section, then, whilst holding down the left mouse button move the cursor along the require section. Then to remove this section of the recording press the Delete key on the keyboard and the sound wave will realign / shortening the length of the recording by the amount of time removed.

Merging audio clips

For managing audio clips, we require two or more prerecorded wav files and follow the below steps.

  1. To record the extra dialogue place the cursor at the end of the audio track, and press record to record the extra dialogue, which will appear as a second audio track.
  1. To position the new dialogue in the correct position in the audio recording, place the cursor where the new dialogue will start, then highlight the audio track from that position to the end (to the right).
  1. Then go to the Edit Menu on the menu bar and select the Split option. This will drop the highlighted section of the audio track into a new audio track.
  1. To order the dialogue correctly use the Time Shift tool found in the Control Toolbar. To move the audio tracks into the correct position the mouse cursor over the audio track and shift them left or right as required to achieve a seamless transition. This will appear in a staircase structure.

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