miniDSP tutorials by AustinJerry
Jerry (Aka AustinJerry) from AVSForum is a long time member of the AVSForum community. He's well known for his writting skills along with providing his support countless times for a wide range of questions. From the 2x4 to the DDRC-88A + BM, Jerry has kept himself busy with a wide range of step by step tutorials. His constant feedback and support means a lot to us. Here are few links worth reading. Make sure to Thank him next time you interact with him on the community! :-)
miniDSP 2x4
- Using the miniDSP 2x4 to time align subs on one channel before room correction: The purpose of this procedure is to outline the approach to use the MiniDSP 2x4 to time-align multiple subwoofers when using an AVR with automated room correction systems (e.g.Audyssey and Dirac Live)
REW
DDRC-88A
As for a great resource of DDRC-88A end users, make sure to check out the AVSForum thread on the DDRC-88A.
Atmos 7.2.4 with DDRC-88A
Here is again to a great tutorial from the AVSForum crew! Keith (Aka kbarnes70) has been a DDRC-88A early adopter who's been providing countless advice on the AVSForum along with other core community members. With his dual DDRC-88A setup, he's now set for 16ch of Dirac Live processing for ATMOS. We're very gratefull he took the time to clarify his setup in this great tutorial!
Extreme EQ with the miniDSP 2x4
Credits: Community member "Soldermizer"
In this tutorial I will show you how to use the 2x4 to use custom biquads to enter EQ values that the user interface would not otherwise allow.
Room Equalization Wizard (REW) is a great utility to set up a sound system. Explaining how to use it is beyond the scope of this tutorial.
Quoting from REW's help file: "An advantage of [miniDSP's advanced biquad programming] is the very high filter frequency and Q resolution it allows, permitting exact targeting of modal resonances."
I will use the 2x4 to do one thing that REW is very useful for: to find room modes (or resonances) in the bass region and create very narrow "notch" filters to attenuate them. This is the first example of using a filter that is most likely too narrow for the GUI (of the Plug-In).
A second use is to create the extreme EQ curve that the Bose 901 needs. Of course you could emulate the EQ curve of the standard 901 active EQ. However, that is so "1970s." Why not use modern technology to make a custom EQ curve? If you have a measurement tool like REW, many people choose a "flat" (or "house curve") for their system. In my case, I use what I call "1/3 octave pink noise subjective EQ" -- I listened over a long period of time, adjusting each band of noise until it sounds nearly the same level as the others. In either case, and for any kind of speaker, you are EQ-ing the speakers and the room as a system, so you only need one curve.
I only use the "advanced" cryptic biquad formulae when I have a very narrow and/or deep filter that I cannot input using the Plug-In user interface. Of course, you can just use the GUI to enter values that are within its range.
Tools used
- MiniDSP 2x4
- Plug-In: PEQ 2 way advanced (need to use custom biquads)
- Room Equalization Wizard (REW) from hometheatershack.com (free, registration required)
- Testing mic + preamp for the above
- Biquad calculators (free, see below) -- to calculate the numbers that MiniDSP wants. I used an Excel spreadsheet named "All-digital-coefs v1.2.xls" I do not have a link but you can Google it or look on the web sites minidsp or diyaudio.
Using MiniDSP 2x4 to Time - Align Multiple Subs with Audyssey
Writing a clear and concise technical application isn't easy but for long time AVSForum member AustinJerry, it seems second nature! We're certainly very impressed by the amount of details and work that was documented in this very nice application note. It's by far the most complete of our Community Tutorial series and we'd like to extend our big Thanks to Jerry! Make sure you do the same. :-)
Overview
The purpose of this procedure is to outline the approach to use the MiniDSP 2x4 to time-align multiple subwoofers when using an AVR with Audyssey room correction.
The benefits of using the MiniDSP, rather than relying on Audyssey's sub correction alone are:
1.Allows time-alignment of multiple subs for AVR's with Audyssey MultEQ or MultEQ XT, which do not have two sub channels with unique level and delay settings.
2.Allows more control for time-aligning more than two subs on AVR's with Audyssey MultEQ XT32.
3.Allows experimentation with EQ'ing the sub channel prior to running Audyssey, potentially improving the final frequency response.
4.Allows implementation of the MiniDSP DDRC-88A Dirac Live, which (as of this writing) lacks support of multiple sub channels.
Read more here.
Dual Sub Integration
This very comprehensive application note was written by community member Neutro on AVSForum. We're very fortunate to see dedicated members taking the time to write a great step by step like this one.
To those of you who have ways/ideas on a little tutorial, make sure to send it to us. And once again a big "Merci" to François!
The goal of this thread is to discuss a handful of topics regarding the integration of one or more subwoofer, using a MiniDSP 2x4, to your average home theater setup. While the MiniDSP is a great platform to perform subwoofer equalization, this won't be discussed here in detail. Rather, I want to focus on how to:
- Perform the actual connexions and setup of the MiniDSP and subs in the system
- Use the MiniDSP as a splitter to simplify the setup for multiple subwoofers
- Easily level-match multiple subs using the MiniDSP
- Tweak the sub integration with the mains using the MiniDSP
- Add a house curve on top of whatever EQing is performed by the AVR