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Comments
I have performed a bunch of tests and the issue is easy to reproduce. I hope that they will address it. Their desktop versions don't have it. Most of their IAA versions don't have this issue either. But it doesn't seem like they are interested in it.
@NembriniAudio does not seem to consider this issue worth looking into. I hope they will change their minds. In some cases it isn't noticeable, but in some it really is. And that low frequency content will muddy up a mix.
With some amp settings, one doesn't notice it so much but in some cases it can be pretty distracting. The pitch of the hum is proportional to the buffer size and is independent of the input signal's content. Sending a sine wave sweep through it and looking at a spectrogram makes it clear.
The Mac versions of their plugins don't exhibit this behavior at all. They are very clean.
Anyway, below are spectrograms that demonstrate the issue. These were created by running a sine sweep from 600 hz to about 2200 Hz through MRH810 with these settings.
Here is the output of their MRH810 Mac version
This is the MRH iOS version as an AU with a buffer of 256. You can see the hum (the horizontal band that doesn't change as the sine wave sweeps).This is at about 150 Hz.
This is the the spectrum analysis of the IAA version. This is much better. It does not have that 150 Hz hum. There is a very low frequency band a bit below 50 Hz (?) but I can't hear it. The Mac version doesn't have it at all.
@espiegel123
A week ago there was an update to fix a DC offset bug.
That didn’t fix this issue?
I’ve gone amplitube and gen labs road.
I really love the sound of nembrini apps,but i can’t stand this hum anymore😉.
It is always there( clean or distorted sound).
Several of their apps have the same problem.
f they fix it Then, i will use them again.
No,it did not.
Dang.
It sounded like they found the buzz.
Maybe a different buzz, then.
@NembriniAudio seemed receptive to my initial report and I sent them some examples and an AUM project to simplify reproducing. But I received a message that demonstrated that they had not understood my report (perhaps I had not documented it clearly enough). When I tried to clarify and provide more information, I received a message that gave me the impression that I was wasting their time with a trivial issue.
I have to say that I was puzzled by the response. The IAA app doesn't have the issue for the most part and the AU clearly does. Since it is directly proportional to the buffer size and not the frequency content, it seems like it must have something to do with how the buffer is loaded when running as AU.
Did this get fixed?
Yes. Last year. Not long after the post you responded to.Thatnews made it into other threads about the issue but I guess not this one.
Good to know! Thanks!