Advice on Recording Sound Effects for a Sound Effect Library
One first needs a professional quality recorder in order to record sound effects that can be good enough to be used personally or professionally. Though there are many expensive options, a handheld $150 to $400 digital recorder no larger than a small digital camera will provide professional quality .wav files. Furthermore, many of these units accommodate up to 4 gigs of recorded audio with the use of a flash card and utilize a simple drag and drop method for saving the .wav files via a USB connection.
Since video has a 48k sample rate then sound effects supplied for video need to be 48k, not the standard 44.1k used for CDS, so any recorder you purchase must be able to record up to 48k quality. If you have a library of 44.1k these samples always have to be up-converted by a video editor and their quality can be compromise. Therefore, do yourself the favor of recording at 48k and you will have a more valuable and usable sound effect collection.
You will need to record two distinct types of sound effects: “ambiences” and “hits.” Short single sonic moments such as glass breaking, an explosion, or a light switch click are called hits. Longer recordings of background noises such as those found on a playground, at a train station, or in an airport are called ambiences.
Both categories are necessary in order to create a good sound effect library. You merely have to go to location such as a train station and hit record in order to get ambience recordings and thus they are the easiest to obtain. More planning and scheming, however, is required for hits because you need to gather the objects and perform the actions to be recorded (called foley) or you need to wait outside police stations, for example, for that perfect siren sound.
The basics of recording a sound effect is literally as simple as hitting the record button. However, there are several tips to keep in mind in order to get the best recordings possible.
2. Record all of your sounds as “hot” as you can, meaning as loud as possible without overloading the microphone. You need to pull back from your source if you notice a red LED light on your recorder which signals that your incoming signal is too hot. Capturing the strongest signal without distorting is the goal.
2. In order to record sounds with high decibel levels, such as fireworks or loud crowds, buy a 10dB pad which will fit between the digital recorder and your microphone. For $20 purchased online, this pad will lower the incoming signal by 10dB
3. While you want to minimize unwanted sounds and noise in your recordings as much as possible, do not obsess over finding the quietest recording environment because great sound effects can occur unexpectedly such as a beefed up motorcycle cruising by. If you are too uptight about getting that perfect recording environment you will slow yourself down in your efforts to gain content and just remember that you can always filter much background noise from your recordings during the editing process.
4. Keep your microphone out of the wind while recording by standing strategically behind wall, trees, or parked cars because wind hitting the head of the microphone will compromise your recordings. Through the editing process and by cutting lower frequencies you can often minimize wind noise but for the most part wind will render your recordings useless.
5. Make sure that your recordings do not contain any live or amplified music from a third party. Your recordings will be useless if they include music from such sources. This music is copyrighted and without permission of the copyright owner it is illegal to use or license such recordings.
The previous points, though simple, are mentioned to help the aspiring sound designer in the assembling of a valuable sound effect library. Articles that cover the editing, organizing, and promotion of these recordings will follow in the future.
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