Welcome! Need support, you got it. Or share your ideas and experiences.
In Reply to: RE: Biamp / triamp MGIIIA...? posted by UncleMeat on December 21, 2023 at 11:57:46
So can you recomment a good source of information so that I can develop a foundation in DSP?
Guessing that to do this properly I need to buy a calibrated microphone and run some sort of program on a laptop to achieve a good result..?
I agree that phase is potentially an issue, and also that to do this with analog electronics is not necessarily trivial. I am pretty sure I can't hear 96kHz but am also wary of crude, low resolution digital manipulation. If one could do this directly from a digital input signal I'd feel a lot better about it because I have been surprised at the difference in quality of various DACs which prior to hearing it, I would never have believed possible.
Yes, doing the room EQ, time alignment, etc would require a calibrated mic. Take a look at the miniDSP webpage, there is also a forum associated with miniDSP. The miniDSP is going to be easier to connect to single-ended components, and designed more towards home audio use. However, it's more expensive and the room EQ is a separate software module you need to buy in addition to the DSP unit and the calibration mic. I don't know if it has digital inputs, it shows coax, HDMI, and optical jacks on the back, but not sure whether they are inputs or outputs.
The DBX Venu360 has a really nice/easy user interface, it can be controlled either by a laptop or iPad, iPhone, or Android device. The room EQ function is part of the unit, and you don't need to buy a separate software suite, all you would need is the DBX calibrated mic to do room measurements. It has 4 AES digital channels @96kHz that can be used for inputs, or you can combo 2 analog channels as inputs and 2 digital, then select which channels you wish to utilize. As I said before, the only drawback is all inputs/outputs are with balanced connectors, so AES would need to come from balanced AES outputs, or converted to balanced AES, and analog inputs/outputs would need to be converted to single ended if sources/amps are single ended.
I use a Rane Balance Buddy unit to do the input/output conversions. There -can- be issues with input impedance, and with grounding using the Rane BB. If you go this route and need help I can give some guidance on it but I can't guarantee it will work flawlessly or all input/output problems can be solved with it. The DAC in the Venu360 is very good IMO, I don't have any problems with the sound of it's converters.
These are only two DSP units, there are many manufacturers of these types of units. MiniDSP is probably the more commonly used unit for home audio use.
DPS will act in a similar way to passive or active crossovers when it comes to phase behaviour. I asked some guys about this...
A miniDSP UMIK-1 microphone + REW is an easy and inexpensive way to measure your speakers and how they interacts with your room. Sure, there is a learning curve but there are guys out there that can help.
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