You have to take a higher level into the T.Racks and attenuate it in the amp. This way the signal is louder than the noise. If you enter the DSP with a weak signal, the noise is louder in relation to it.
Don't amplify the signal inside the DSP. It may not be all that easy to find the right levels. In PA use this is quite simple, as you don't change the SPL that much, usually you have it set once and that's it. At home you may listen at very low and quite high levels. You got to set it to make best use out of the resolution a digital DSP has.
Don't amplify the signal inside the DSP. It may not be all that easy to find the right levels. In PA use this is quite simple, as you don't change the SPL that much, usually you have it set once and that's it. At home you may listen at very low and quite high levels. You got to set it to make best use out of the resolution a digital DSP has.
This is definitely a challenge. I’m currently applying a low-pass filter (LPF) along with an 8dB low-shelf boost, so there’s a potential risk of clipping the outputs to the amplifier.
To mitigate this, I reduced the output gain by 8dB, which of course required compensating by adjusting the amplifier gain.
You’re suggesting it would be better to leave the output gain at 0 and reduce the amplifier gain instead.
Do you think this DSP has sufficient headroom to handle this level of boosting?
To mitigate this, I reduced the output gain by 8dB, which of course required compensating by adjusting the amplifier gain.
You’re suggesting it would be better to leave the output gain at 0 and reduce the amplifier gain instead.
Do you think this DSP has sufficient headroom to handle this level of boosting?
What are the leds on the unit doing?
What are the level meters in the app showiing?
On mine the leds only flickered green on peaks.
What are the level meters in the app showiing?
On mine the leds only flickered green on peaks.
I did not check the leds, only the levels meters. In some peaks they where red. My DSP is hidden so I cannot see the leds
Now I tested it. If I put the output to zero the meters go into the red. I assume this means that it is clipping at the outputs then.
You got to go into the DSP with high level and reduce it at the last stage before amplification. How you realize this depends on the whole chain and how you use the different stages of the DSP.
You should not overdrive any digital processing, but use it's possible gain. If you clip the digital level, you will instantly hear it.
You should not overdrive any digital processing, but use it's possible gain. If you clip the digital level, you will instantly hear it.
@Turbowatch2. My setup is :
Preamp-> T.racks 4x4 -> poweramp
Inside the DSP I have a low pass filter and a low shelf filter with a boost of 8db@30 hz. My question is do I need to make any adjustments to the gain settings inside the DSP to avoid clipping ? Does it have enough headroom inside the DSP for this boost?
Preamp-> T.racks 4x4 -> poweramp
Inside the DSP I have a low pass filter and a low shelf filter with a boost of 8db@30 hz. My question is do I need to make any adjustments to the gain settings inside the DSP to avoid clipping ? Does it have enough headroom inside the DSP for this boost?
You got to find out by your self. If you dial in your maximum input level, it is supposed not to clip at the output. If it does, back down until it is clean again. Another way is to lower instead of boosting. It depends on your individual situation. External help is limited with such a problem. Anyway, you should be able to find a setting that combines lowest noise and clipping free operation.
I have now now done extensive testing and I will send the T.Racks back for checkup. The unit is dead quiet when using input 2 or 3 but noisy on channel 1 and 4. This is with my class 2 AV preamp. Using a grounded preamp the noise is gone. So there is some grounding issue going on I think.