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miniDSP Low cost, modular Digital Signal Processor (DSP) kits for the DIYer from miniDSP.

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Old 13th December 2010, 05:14 PM   #1
pof@ is offline pof@  Denmark
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Default Volume control, digital input and output

I have been looking around for the possibilities for digital crossover and room correction lately and miniDSP look like an interesting choice.

I have a few questions I hope somebody is able to answer…

1 - I understand there is a possibility to connect a volume control so the miniDSP don’t need a preamp. If my only music sources are digital, Squeezebox/digital out from the CD player, the digital signals are converted for the first time in the DAC after the DSP?

2 - How is the volume control implemented inside the miniDSP? Is it “just” a calculation/reduction of the signal so to speak? I mean – how is resolution at low levels?

3 - Is there a version with digital input and digital output – where the signal is not converted into analogue domain? If yes, I will be able to connect whatever DAC to the output I like?

Thanks in advance
Peter
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Old 13th December 2010, 08:45 PM   #2
knuisje is offline knuisje  Netherlands
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1. The first conversion is AD, then after the dsp processing is the second conversion, DA. All these steps are performed on the dsp chip. To avoid the AD conversion you need a Minidigi which accepts SPDIF.
2. In my experience digital volume control doesn't degrade the sound audible.
3. See 1. Digital output as I2S is available in the plain Minidsp. For SPDIF out you need a Minidigi.
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Old 14th December 2010, 05:42 PM   #3
pof@ is offline pof@  Denmark
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Ah, ok thank you.

Is the Minidigi the exact same thing as miniDSP just without the ADC/DAC?

So for at 3 way speaker system I need two Minidigi. Does this have the option for volumen control?
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Old 14th December 2010, 06:08 PM   #4
knuisje is offline knuisje  Netherlands
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No, the Minidigi is an addon board working in conjunction with the Minidsp. It's all on their website.
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Old 14th December 2010, 07:31 PM   #5
pof@ is offline pof@  Denmark
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Finally found it. Thanks.

So, did anybody compare the sound to other systems? Can this do high-end (whatever that is)
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Old 15th December 2010, 03:38 PM   #6
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http://redspade-audio.blogspot.com/2...ing-tests.html
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Old 16th December 2010, 01:19 PM   #7
pof@ is offline pof@  Denmark
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Quote:
Originally Posted by bobkamikaze View Post
Thanks - interesting
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