RME ADI-2/4 Pro SE - RIAA mode measurements

[Bland_username42069]

It should only sum (theoretically), but there's also a dropout in the 500-50 Hz range.
1. That's how this filter works.
2. My RME unit is faulty, strangely enough, only in this case
3. I performed the test well.

I bet $1 that this filter is designed that way.

I will be taking my $1.

 

[Erogen]

The issue isn't the RME, it's your test methodology.

Yes, my dear fellow, your measurement script is not suitable for this.

You'll need to adjust the Rumble filter to further reduce the amplitude level to 25 Hz.

 

[Erogen]

I will be taking my $1.

grab $1 it's yours

RME: +++++

 

[Erogen]

We'll leave it at that. Amne

 

[DrCWO]

I also encounter the same behavior with mono bass.

Here my Explanation:

1. Add Right and left channel at low frequencies so the sum (S) is: S = L + R
2. Distributing this sum to both channels will end in unwanted doubled volume at the Listening Position (LP): LP = 2 * S = 2 * L + 2 * R
   To avoid this the New Left (NL) and New Right (NR) signal will be attenuated by half to: NL = NR = S / 2
3. If I now have a measurement signal with the sinus let's say on the left channel ONLY and the right channel silence I get:
   S = L + 0 --> NL = S / 2 --> NL = (L + 0) / 2 --> NL = L / 2. This means half the volume on the left channel. Same on the right.
4. At the end this explains the drop off for low Frequencies.

And if you look at the posted measurement you see approx. -6dB (=1/2) below 50Hz.

q.e.d.

This means you can leave the Mono Bass switched on!
On most LPs the Bass is recorded in mono (not on the test record!) so both channels get input and you never encounter the -6dB drop in real world.
This means mono bass will do no harm at all with normal LPs but will improve overall sound quality.

Best DrCWO

 

[Erogen]

Here my Explanation:

1. Add Right and left channel at low frequencies so the sum (S) is: S = L + R
2. Distributing this sum to both channels will end in unwanted doubled volume at the Listening Position (LP): LP = 2 * S = 2 * L + 2 * R
   To avoid this the New Left (NL) and New Right (NR) signal will be attenuated by half to: NL = NR = S / 2
3. If I now have a measurement signal with the sinus let's say on the left channel ONLY and the right channel silence I get:
   S = L + 0 --> NL = S / 2 --> NL = (L + 0) / 2 --> NL = L / 2. This means half the volume on the left channel. Same on the right.
4. At the end this explains the drop off for low Frequencies.

ok

 

[Erogen]

The JP measurement script measures various parameters of a phono cartridge in the 20Hz-20kHz range.
In the case of vinyl records, a major problem is the very high resonance in the 20Hz range.
How can I measure this to set the correct parameters for the RUMBLE filter in the RME?

 

[Bland_username42069]

The JP measurement script measures various parameters of a phono cartridge in the 20Hz-20kHz range.
In the case of vinyl records, a major problem is the very high resonance in the 20Hz range.
How can I measure this to set the correct parameters for the RUMBLE filter in the RME?

There is already a preset built in

 

[Erogen]

There is already a preset built in

This is a preset (which can be modified).
I don't know if the preset is correct for my system.
How can I check this?

 

[Bland_username42069]

This is a preset (which can be modified).
I don't know if the preset is correct for my system.
How can I check this?

It’s the same preset for any system

 

[Erogen]

This model has two issues:

1. The lack of physical volume controls, which significantly limits convenience and functionality when recording audio.
This is very poorly designed.

2. Unfortunately, there is no smooth adjustment, only increments of 0.5 dB.
This is also poorly designed.

 

[DrCWO]

You always should record with a headroom of 3-6dB so I can't see any issue and I recorded a lot of LPs even for friends without any problem and highest quality.

 

[JP]

It's really just a lack of understanding. In a professional environment having the ADC at a reference level is far more important than an arbitrary control.

 

[MaxwellsEq]

This model has two issues:

1. The lack of physical volume controls, which significantly limits convenience and functionality when recording audio.
This is very poorly designed.

2. Unfortunately, there is no smooth adjustment, only increments of 0.5 dB.
This is also poorly designed.

It's an excellent device. You use it badly.

 

[Erogen]

Mono Bass Function

Mono Bass OFF

Mono Bass ON

 

[Erogen]

You always should record with a headroom of 3-6dB

When transferring a recording from a vinyl record to a computer, I make initial test recordings. I adjust the recording level to record at maximum volume, even if it means cutting off a few momentary peaks, a few, not dozens.
After corrections, I make a second proper transfer.
I transfer each recording individually, not the entire side of the record. Vinyl recordings have different volume levels.

 

[levimax]

When transferring a recording from a vinyl record to a computer, I make initial test recordings. I adjust the recording level to record at maximum volume, even if it means cutting off a few momentary peaks, a few, not dozens.
After corrections, I make a second proper transfer.
I transfer each recording individually, not the entire side of the record. Vinyl recordings have different volume levels.

If you do it that way you lose the "relative loudness" of each song on the LP. For me one of the best things about physical media (CD's and LP's) is that different songs on an album are louder or softer, it is part of the "art". I would not like to lose that when capturing.

 

[JP]

Regardless, it's a poor workflow. Ensure proper headroom, record, normalize levels in post.

 

[Bland_username42069]

My eyes are bleeding

 

[Erogen]

Ensure proper headroom, record, normalize levels in post.

Yes, it makes much more sense.