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E1DA Cosmos ADC
- Thread starter mansr
- Start date
The OS often does without me asking it to. It's not about my software, that I already changed not to modify volume setting.
When I switch to Windows 8, for example, I often find my volume settings changed. Don't know why. This happens on a Mac, as well. So I'm often forced to debug why things are not working as expected, until I figure out that the volume control was moved for whatever reason.
That's what I suggested. No need for a new app, just a setting on the tweak app to defeat volume control behavior.
Well, while you're at it, that could be with 3 positions: Remote (linked to volume control, and default option), Mono and Stereo (which won't change whatever the volume control is).need for a new app, just a setting on the tweak app to defeat volume control behavior.
This is doing the same, I guess, but more straightforward.
For me, I will never use the stereo mode (I have 2 E1DA ADC)
IVX
Major Contributor
well, that's also an interesting point, some people ask me why the default(but actually it is Windows default) is MONO, they believe STEREO default is more reasonable.
I thought MONO is the best for measurement so would be better if MONO is the default.
I thought MONO is the best for measurement so would be better if MONO is the default.
1231rq32r1qw32r
Active Member
1231rq32r1qw32r
Active Member
That's what I suggested. No need for a new app, just a setting on the tweak app to defeat volume control behavior.
Ah! Apologies, I should pay more attention. I like this idea, but I wish the language was clearer. It should be 'stereo' and 'mono' in my opinion - no mention of volume or channels.
I prefer "channels" vs. "mono/stereo", perhaps because most measurement (test) equipment and pro components use that nomenclature, and it is more general in use. The volume defeat seems self-explanatory. Maybe there's a language barrier. 
1ch = 1 channel = mono as a special case (e.g. could be one side of a stereo pair)
2ch = 2 channels = stereo as a special case (could be two independent channels, such as different channels in a multichannel setup)
The user interface is one of those things that will never satisfy everybody. Pick one and hope customers RTFM (as if).
1ch = 1 channel = mono as a special case (e.g. could be one side of a stereo pair)
2ch = 2 channels = stereo as a special case (could be two independent channels, such as different channels in a multichannel setup)
The user interface is one of those things that will never satisfy everybody. Pick one and hope customers RTFM (as if).
Would this signal chain be possible ?
2 SDC Mics >>> 2 E1DA Cosmos APU ( using preamp in and out) >>> Cosmos ADC >>> Computer >>> Combo DAC + Headphone amp
If yes, would it be better soundwise and specwise than audio interfaces like Rme babyface pro fs and Motu ultralite MK5 ?
Thanks in advance,
2 SDC Mics >>> 2 E1DA Cosmos APU ( using preamp in and out) >>> Cosmos ADC >>> Computer >>> Combo DAC + Headphone amp
If yes, would it be better soundwise and specwise than audio interfaces like Rme babyface pro fs and Motu ultralite MK5 ?
Thanks in advance,
If that will be possible :
This will very much be dependent of your use case.
A Neumann KM184, as an example, is 20dB more sensitive than a Shure SM58.
So the APU minimum gain of 34dB may even be too much for it, depending on the source level and mic position.
It will almost certainly NOT be better than a typical specialized sound interface in the caregory you listed.
These are very competent devices, and the ability to adjust accurately the Mic preamp gain will DESTROY any benefit that you may have in terms of raw performance from the ADC or APU preamp.
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Unlike an integrated audio interface, Cosmos ADC and DAC are not synchronized, which would need resampling in software. This would not necessarily be an audible issue, but high-quality resampling takes quite a bit of CPU power and bit-perfect playback from ADC is ruled out.
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My mics are Line audio CM4 which have a -42 dBV sensitivity compared to the 36 dBV of the Neumanns so 34 dB gain should be fine. Would a more simple 2 channel mic pre (DAV BG1, RME Quadmic, FMR RNP) be better than the audio interfaces I've listed ( still with the cosmos ADC )?
IVX
Major Contributor
don't forget that Cosmos ADC may accept 10Vrms, and Cosmos APU output as well, so, 10V/50=200mVrms is the mic's output clipping level.
IVX
Major Contributor
Correct me if my memory serves wrong but you 1 year ago recommend me the gain of about +30db, right?
Yes, I still think that's a good starting point.
If you have to select just a few gains, I'd still recommend 30dB and 60dB.
Don't forget microphones have sensitivity ranging from, roughly, 30mV / Pa for a typical large diaphragm condenser, down to 1mV/Pa for a low sensitivity dynamic or ribbon microphone. That's almost 30dB spread.
Not to speak about source's SPL, distance from source,...
If you have to select just a few gains, I'd still recommend 30dB and 60dB.
Don't forget microphones have sensitivity ranging from, roughly, 30mV / Pa for a typical large diaphragm condenser, down to 1mV/Pa for a low sensitivity dynamic or ribbon microphone. That's almost 30dB spread.
Not to speak about source's SPL, distance from source,...
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1231rq32r1qw32r
Active Member
In macOS you can sync the clock of different devices.
It uses resampling (or "drift correction" in macOS) to do that.
1231rq32r1qw32r
Active Member
Yeah, that’s fine I think.
Or rather, I should say, I don’t really know why it’s important really.
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IVX
Major Contributor
me too, if anyone can explain it would be nice.
