At 11/25/08 12:21 AM, diminitive wrote:
At 11/24/08 11:49 PM, nal1200 wrote:
Basically, you're making a track that has varying levels of frequencies
What does the frequency of a sound have to do with compression? Don't you mean varying levels of loudness?
Frequency and amplitude are both important for compression and equalization. Amplitude tends to be geared towards compression and frequency to equalization. Depending on how your song fits in the sound spectrum, a lot of can be determined in way of how to compress. Here's a wiki cutout specifically talking about frequency in regards to multi-band compression.
Multiband (also spelled multi-band) compressors can act differently on different frequency bands. The advantage of multiband compression over full-bandwidth (full-band, or single-band) compression is that changing signal levels in one frequency band (such as from a sporadic low frequency kick drum) don't cause unneeded audible gain changes or "pumping" in other frequency bands.
Multiband compressors work by first splitting the signal through some number of bandpass filters or crossover filters. The frequency ranges or crossover frequencies may be adjustable. Each split signal then passes through its own compressor and is independently adjustable for threshold, ratio, attack, and release. The signals are then recombined and an additional limiting circuit may be employed to ensure that the combined effects do not create unwanted peak levels.
So in essence, how you want your song to sound (and how loud you want it to be) can be determinates of how you compress and equalize.