Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member
Direct injection of a signal means that a microphone is bypassed, and the electric instrument is plugged directly into the console, microphone preamp, or recording device. It's used to capture the pure sound of the instrument which isn't always desirable, and to eliminate the need for an additional microphone, making the session setup faster. There are a couple of other good reasons why a direct box is used though. The so called DI box matches the impedance of the mic preamp to the instrument. So, that the high frequency response isn't rolled off. It also provides ground isolation to eliminate any straight hum that might occur.
There are two basic types of direct boxes. Active which provides gain and therefore needs electronics requiring a battery, AC or phantom power. And Passive, which has no gain, doesn't require a power. The Active box like the Countryman Type 85 sometimes has enough gain to be able to actually replace the mic preamp and connect directly to a storage device like a tape machine or DAW. Passive direct boxes are generally a lot cheaper than the active units. But the cheaper they are, the more the low frequency response usually suffers, which is not the best thing for bass recording.
Get unlimited access to all courses for just $25/month.Become a member
73 Video lessons · 18038 Viewers
130 Video lessons · 19253 Viewers
110 Video lessons · 11022 Viewers
71 Video lessons · 15009 Viewers
Access exercise files from a button right under the course name.
Search within course videos and transcripts, and jump right to the results.
Remove icons showing you already watched videos if you want to start over.
Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.
Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.