Originally Posted by infurno
I have been working with VST for EQ and the Winamp VST bridge plugin. Unfortunately, Winamp has it's playback limitations and no support for DVD menus for example. Without access to any other players that support VST I started to look elsewhere.
I use an Asus Essence ST soundcard with the H6 daughtercard for 7.1 channels. My media player is J. River Media Center 15 with the following VST Plugins: VoxengoBMS, Sound Delay (by Voxengo), and GlissEQ (by Voxengo). All these plugins are 8 channel. To use them, I have my output in MC15 set to 7.1 with unused channels silent. For two channel music, this sends the original two channels and opens up the other channels so I can use channel 4 for bass management. I am using ASIO output with bit-matched drivers, but could also use WASAPI or Kernel Streaming. Only ASIO provides automatic bit matching.
The plugins can be ordered and they now work for all sources: music and video. They used to just work for audio sources. They also made changes to the output modes so that one can output in 5.1 or 7.1 with unused channels silent. MC15 supports up to 32 channels. I read on the Audiolense forum that someone is using 16 channels for digital crossovers using Audiolense, Convolver plugin, and MC15.
This plugin is very flexible and allows the bass to be moved, mixed or monitored. Moving removes bass from one channel and combines it with the LFE channel. It is like a Small speaker setting. Mixing keeps the original channel fullrange and copies the bass to the LFE channel. It is like a Large speaker setting with duplicated bass. Monitoring allows you to listen in the original channel to just the bass that is being moved. This is useful for comparing the bass in the mains to the subwoofer to hear audible differences and to listen how each reproduces it. The original LFE and the redirected bass can have their gain changed separately even though both end up in the same channel.
The crossover can be set from 40-150 Hz with a 1 to 48 db/octave rolloff. The rolloff on the high pass is set at 12 db/octave. The crossover has a linear phase design so the frequency response and the phase remain flat.
This plugin allows for delay to be set for each channel in msec, meter, or foot. It has a granularity of .01. You can also set the gain separately for each channel. Using the group delay function in V5 of Room EQ Wizard, you should be able to dial in the exact acoustic distance setting for all speakers.
Although this has many dynamic filters for mastering, the Peaking Plain and Hi/Lo Pass filters are not dynamic. The Peaking Plain is what is used to reduce peaks in the bass response. It can go down to 1 Hz, has a bandwidth of .01 to 7, and a gain of +/1 15 dB.
With these plugins you can do the following:
* Route all bass below the crossover to the LFE channel
* Use some speakers as Large and some as Small
* Route all bass below the crossover to the LFE channel and put Hi-Pass filters on other channels at a different frequency so you can cascade bass in those channels over the LFE channel (similar to Geddes method)
* With a 5.1 system you can use the extra channels of a 7.1 soundcard for more subwoofers. You could then use Hi or Lo-Pass filters for each subwoofer. You could also EQ all subs together.
* Perform parametric EQ on individual channels or you can group channels together for EQ.
* Accurately set your distance (delay) and gain for all channels
* You can A/B between various settings and listen to the bass either in its original channel or in the subwoofer channel. This is helpful for determining slope and crossover frequency.
I have setup filters in GlissEQ for fun, but haven't made any measurements yet with REW because I keep thinking I'm going to upgrade my subwoofers. One of these days I'll get around to measuring.