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RE: Biamp / triamp MGIIIA...?

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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.

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RE: Biamp / triamp MGIIIA...? - UncleMeat 23:33:13 12/21/23 (1)
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.

https://www.minidsp.com/products/ht-series/flex-htx

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.

https://dbxpro.com/en-US/products/driverack-venu360

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.
- RE: Biamp / triamp MGIIIA...? - Roger Gustavsson 02:02:56 12/22/23 (0)
  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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