This is exactly what happens yes. It's easiest to consider the low frequency gain of a fir filter, it's just the sum of all the coefficients. Resampling it to a higher sample rate basically inserts more samples between the existing ones, and this increases the sum by the new rate divided by the old rate.
Has anyone got this to work if you have a space in your user name?
Can't get the batch files to run for the GUI and thinking I need to make a new, space-free user
I get the error:
Thanks,
Brian
Can't get the batch files to run for the GUI and thinking I need to make a new, space-free user
I get the error:
Thanks,
Brian
Ok, looks like everything is running
Trying to make a preamp and duplicate the settings I have now in my DSP amp
How do you make a DEQ?
DEQ = Dynamic EQ = PEQ with a compressor
So it will work as a PEQ up to a threshold then start to compress
I have a 70Hz NULL in the left speaker due to a bay window, so I fill this in with the right speaker
I don't have infinite power or excursion, so I set the compression so I don't overdrive anything
Brian
Trying to make a preamp and duplicate the settings I have now in my DSP amp
How do you make a DEQ?
DEQ = Dynamic EQ = PEQ with a compressor
So it will work as a PEQ up to a threshold then start to compress
I have a 70Hz NULL in the left speaker due to a bay window, so I fill this in with the right speaker
I don't have infinite power or excursion, so I set the compression so I don't overdrive anything
Brian
4GB? 16 is OK for sure... welcome! Its great.
Be sure to use a USB isolator for the connected DAC - very important.
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Be sure to use a USB isolator for the connected DAC - very important.
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Card looks good. Sandisk make quality ones. It's a galvanic isolator with USB in and USB out. It will break any ground loops between the Pi and your DAC. I strongly suggest you get one.
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Just my 2 cents but I’ve never found the need for a USB isolator when using a RPi4 with well designed commercial USB DACs and interfaces. However, I also only use balance connections. This is based on listening as well as measurements at the amplifier terminals with the RPi4 in the chain showing no additional noise.
If you are using balanced connections with the MOTU UL I wouldn’t worry about an isolator unless you have a noise issue.
Michael
If you are using balanced connections with the MOTU UL I wouldn’t worry about an isolator unless you have a noise issue.
Michael
My concern about noise, hum issues leads me to always go the extra mile for balanced connection. The same concern caused me to buy an isolator just in case. I suspect I won't need it. Might depend on what I feed audio into the Rpi from. Hopefully, I can do it wirelessly
How does the compression work in the existing dsp? Does it monitor the signal level around 70 Hz and adjust the gain dynamically? Or does it simply reduce the peq gain based on the volume setting?
Hi Henrick, it works dynamically, so the compressor works just on the signal level for that EQ
The amp has separate compressor limiters for the final output as well
Brian
The amp has separate compressor limiters for the final output as well
Brian
Ok, and when it compresses, does it then bring the peq gain down to 0 dB, or can it even go negative?
Hi Henrik, I don’t honestly know. I suspect it goes negative, but it’s not essential for my application
Brian
Brian
There isn't an exact equivalent in CamillaDSP, but you should be able to build something reasonable with the existing things. One way could be to put in a mixer that creates a copy of the left channel. Then bandpass filter it at 70 Hz with a suitable q, and add a mixer that adds this signal to the right channel. And you can add a compressor before this second mixer, that makes sure the additional 70Hz signal doesn't get too strong.
... there isn't exactly an equivalent for CamillaDSP ...
As a New Years Eve statement, let me say that I (we?) had a very happy old year. CamillaDSP-wise.
So, thank you, Henrik.
Thank you for all your work you have done in 2024 for all of us CamillaDSP users, work in terms of ongoing refinements of CamillaDSP itself, and work in terms of user support.
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Thanks @Daihedz, the gang here is an important part of why I enjoy working on CamillDSP so much!
Happy new year everybody 🥂🍾
Happy new year everybody 🥂🍾
Just wonder if the audio could be split in two parallell prosesses and joined afterwards
One that is always resampled to 48k and one that is high pass filtered at 24k and not FIR filtered with the long filter.
Then the 48k prosess can be upsampled and joined with the high pass filtered and delayed HF chain