OK, this is a really dumb/simple question.
I have an M-Audio Transit that claims to output max 0dBV, or 1Vrms. However, the minidsp for some reason has a 0.9V and 2V setting. So I chose the 2V setting. Now the output to my amp is about 1/2 of the original level, so I have to crank my amp's volume knob way up.
My question is where do I go to increase the overall gain of the minidsp outputs? I only see sliders to reduce them.
I have an M-Audio Transit that claims to output max 0dBV, or 1Vrms. However, the minidsp for some reason has a 0.9V and 2V setting. So I chose the 2V setting. Now the output to my amp is about 1/2 of the original level, so I have to crank my amp's volume knob way up.
My question is where do I go to increase the overall gain of the minidsp outputs? I only see sliders to reduce them.
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The main reason I dumped the miniDSP for the nanoDIGI. Now I get the full voltage out of my DAC(s).
Bob
Bob
You can't increase the maximum output. It's 0.9 VRMS on the miniDSP 2x4 boards and that's all you can get.
The jumper settings implement a voltage divider/attenuator at the input of the board. For your setup I would choose the 0.9V setting vice the 2.0V setting. That will increase your output 7db relative to what you have now.
Dave.
I don't need to increase the output voltage beyond .9V on the minidsp. Right now my output cannot exceed 0.45 because I have 1V max on my input device (I thought that was a standard "line out" voltage?), and the board is set at 2V input. So all I need is a digital function to increase the gain by a factor of 2. I also can't use the 0.9V input because there would be risk of clipping.
If the problem is a lack of internal gain, then here is a way to get it if you have an plug-in with "advanced biquad" capability.
Each biquad is described by a set of coefficients, like this:
If all the coefficients are given a value of zero except the first one, b0, the biquad describes a gain block and the number you enter for b0 is the amplitude, A. The gain in SPL = 20*log10(A), for instance:
2.0 = +6dB
0.5 = -6dB
0.707 = -3dB
and so on.
So, I would go to the parametric EQ bands, choose an unused band, click on "advanced", and then enter the amplitude corresponding to the gain you want to put into the system for the coefficient b0. Leave all the other coefficients set to zero, like this:
-Charlie
Each biquad is described by a set of coefficients, like this:
biquad1,
b0=0.000042443368140115214,
b1=0.00008488673628023043,
b2=0.000042443368140115214,
a1=1.9814885091390815,
a2=-0.9816582826116418,
The above happens to be a 100Hz 2rd order Butterworth low-pass filter. b0=0.000042443368140115214,
b1=0.00008488673628023043,
b2=0.000042443368140115214,
a1=1.9814885091390815,
a2=-0.9816582826116418,
If all the coefficients are given a value of zero except the first one, b0, the biquad describes a gain block and the number you enter for b0 is the amplitude, A. The gain in SPL = 20*log10(A), for instance:
2.0 = +6dB
0.5 = -6dB
0.707 = -3dB
and so on.
So, I would go to the parametric EQ bands, choose an unused band, click on "advanced", and then enter the amplitude corresponding to the gain you want to put into the system for the coefficient b0. Leave all the other coefficients set to zero, like this:
biquad1,
b0=2,
b1=0,
b2=0,
a1=0,
a2=0,
Keep in mind that this will elevate the internal level of the digital representation of the music stream. Making it too high can lead to digital clipping which sounds pretty bad. In your case I do not think you will encounter that.b0=2,
b1=0,
b2=0,
a1=0,
a2=0,
-Charlie
Way over my head. Is this (kind of) the analog "equivalent" of moving ALL the equalizer sliders to the "up" position?
Regardless of what type of digital gain you apply internally, you still can't exceed the 0.9 volt maximum output. I hope that's clear.
The 0.9 volt input jumper is still preferable since your Transit can only produce about 0.95 volts. A very minimal chance of clipping in this configuration.
Cheers,
Dave.
The 0.9 volt input jumper is still preferable since your Transit can only produce about 0.95 volts. A very minimal chance of clipping in this configuration.
Cheers,
Dave.
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