Another unique feature was the selectable ratios of and for compression, and and for limiting. This allowed the to make a sound unlike any other processor ever heard before. Distortion increased, along with a plateaued slope and a lag time in response to initial transients, creating an explosive sound on drum room mics, making an incredible grungy bass or electric guitar sound, or squeezing a vocal so it sat right in your face.
The characteristic that most lovers agree on is that what comes out is better than what went in. Bruce Swedien used his on all the Michael Jackson vocals he recorded. Some even use the with the compression turned off, just for the distinctive tone it imparts. The signal goes through the input stage, via the line input transformer, which has a big impact on the sound. From there, the signal is routed to the top of a FET, which is being used as a variable voltage resistor.
Depending on the revision of the unit, the FET is either used to shunt some of the input signal to ground, or as the top leg of a voltage divider in parallel to the input of a pre-amplifier stage. The resistance between the Drain and Source leads of the FET will change in response to voltage applied to the Gate lead. As the signal flows to the output stage, it is tapped and also sent to a sidechain detector circuit.
This sidechain develops a Gate control voltage for the FET based on the dynamics and level of the input signal, as well as the front panel control settings.
For minimal distortion, careful circuit design was required to make the FET operate within a narrow linear range. Can be used by DJs for Ducking E. Lowering the volume quickly for when they talk! Multi-band Compression — Compressor that allows you to change the frequency bands, ensuring you can change the compression levels of certain frequency bands rather than the full bandwidth. Multi-band compression is good for mastering.
You must be logged in to post a comment. Description of Compression: Compression is the process of reducing the dynamic range between the loudest and quietest parts of an audio signal. Well, compressors and limiters are actually a tool that were created for use in the broadcast industry.
When we transmit audio over the air to radio, we do so by modulating a radio signal. Now, without getting too far into the specifics on how radio works, a radio wave is just a simple sine wave. The audio signal that will actually be transmitting over that sine wave is what modulates or changes the properties of that radio wave.
You may be asking, what in the world does this have to do with compression? Well, there can be an issue with transmitting an audio signal over a radio signal known as over-modulation.
Thanks for the response. I didn't mean to hit a sore spot, but truthfully, your response was interesting in many ways. I've taken some of the recordings from the 60's and 70's and have "turned up the volume" in order to compare recordings from then to more current recordings.
It seems the bottom end on newer recordings are much more pronounced and clearer. For example, compare the bottom end to an early Beatles' song like "I Saw Her Standing There," a personal favorite of mine, and then compare the bottom end to something like the Pretenders' "My City Is Gone. Yet the difference is stunning. I don't know. I was hoping that you might provide a little insight into the matter.
Again, thank you for your time. I really find your responses informative. No problems If you're talking specifically about the bottom end, and bass in particular, I don't think it really has to do with compressors. The most coveted compressors these days are still some of the oldest. Fairchild, , LA2A are all classic compressors that have been around for a long time, and are still copied and even emulated with plug-ins today.
Compressor technology really hasn't evolved enough over the years for that to be the difference you are hearing. I believe it's simply more of a progression of the recording medium and the enhanced techniques allowed as recording technology improved. Parallel vs serial compression ». Search for:. Subscribe via Email. This field is for validation purposes and should be left unchanged. Get Help! Submit your Question Need more personal help or consulting?
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