Roland68
Major Contributor
Or has anyone found pictures of the whole circuit board of the VMV A2?Does anyone have a picture of the inside (with the whole Printed Circuit Board) of the SMSL VMV2?
Or has anyone found pictures of the whole circuit board of the VMV A2?Does anyone have a picture of the inside (with the whole Printed Circuit Board) of the SMSL VMV2?
We are clearing the 16 bit audio hurdle at just 5 watts which is my target which sadly many amps fail to achieve.
The second puzzle was the frequency response. Here I am driving the amplifier using Coax at 192 kHz sampling so we should have flat response to half of that but we don't:
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Indeed, you can set the sample rate to anything you want, change to USB, etc. and you always get what seems to be 44.1 kHz sampling! SMSL advertises the "high-res" capability heavily in this amp but while the DAC is likely capable of delivering that, the amplifier happily shuts any extra spectrum above audible band.
I think nothing explains this common misconception better than this classic from xiph.Dear amirm,
A 20 kHz sine wave in 16 bit 44.1 kHz sampling rate is actually not a sine wave and it is pretty much distorted because this sampling rate resolution is not enough to pack 20 kHz sine wave in it.
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Hello.Your calculation result is correct. However, after this, it passes through a low-pass filter and is shaped into a sine wave.
Theoretically no noise is generated when there is no input, but in reality it generates a small amount of noise. But it's at an inaudible level.
I think nothing explains this common misconception better than this classic from xiph.
44.1kHz sampling rate is plenty to capture a 20kHz sinus wave.
I think nothing explains this common misconception better than this classic from xiph.
44.1kHz sampling rate is plenty to capture a 20kHz sinus wave.
You have been a member since 2019 and still don't know the sampling theorem? Below is from Wikipedia.Here is one more example made with software audio editor Audacity which will make it more clear. It is similar to looking at 800x600 display resolution and 4K or higher. Listening high res files will for sure be noticable even if the amp does not play outside of 20Hz to 20 kHz. That was my point anyway.
Check the photo. All tracks are 20kHz sine. Sampling rates and bit depth can be seen on the left side.
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It is great that You know it.You have been a member since 2019 and still don't know the sampling theorem? Below is from Wikipedia.
View attachment 314426
The only thing your picture shows is that for your eye it is easier to reconstruct the sine wave if you have more samples.Here is one more example made with software audio editor Audacity which will make it more clear. It is similar to looking at 800x600 display resolution and 4K or higher. Listening high res files will for sure be noticable even if the amp does not play outside of 20Hz to 20 kHz. That was my point anyway.
Check the photo. All tracks are 20kHz sine. Sampling rates and bit depth can be seen on the left side.
View attachment 314424
Thanks for Your reply.The only thing your picture shows is that for your eye it is easier to reconstruct the sine wave if you have more samples.
that says nothing about the analog signal you get when you apply digital to analog conversion to these samples followed by proper low-pass filtering. The 20 kHz sinus will be perfectly reconstructed for all sampling frequencies .
You did not seems to have watched (or understood) the video.
I think you are on to something![…] it must benefit something to have more samples than less samples as otherwise all these high res, DSD, etc things make no sense...
if you check your empty mailbox every minute for a whole day, instead of once per day after the mailmen made his round, is it more empty?Now I can back to my point... listening high res files can have difference even if the amplifier operates only within the hearing specter.
If You want to say that I've discovered that high res makes no difference, You are wrong. Sorry. I listened to so much music on so many systems, compared a lot of them and yes, it makes difference. I simply discovered new things in some songs after listening in DSD.I think you are on to something!
Hahahahahaha. A great one but not applicable to our topic. However, let me answer... It's not more empty but You will know more precisely that it is empty.if you check your empty mailbox every minute for a whole day, instead of once per day after the mailmen made his round, is it more empty?
Perhaps provide some evidence to support that hypothesis.
the question then becomes how you did you perform your comparison of DSD to 16bit @44.1kHz. DSD files often use different masters as used for CD releases. If you did the conversion to 16 bit yourself, how did you do it and did you check the levels your DAC outputs etc.If You want to say that I've discovered that high res makes no difference, You are wrong. Sorry. I listened to so much music on so many systems, compared a lot of them and yes, it makes difference. I simply discovered new things in some songs after listening in DSD.
Hahahahahaha. A great one but not applicable to our topic. However, let me answer... It's not more empty but You will know more precisely that it is empty.
Hi,the question then becomes how you did you perform your comparison of DSD to 16bit @44.1kHz. DSD files often use different masters as used for CD releases. If you did the conversion to 16 bit yourself, how did you do it and did you check the levels your DAC outputs etc.
If there are advantages to high res has been discussed here at length in various threads(like this one started by amir), but is a bit off topic for the VMV A2 thread I think.
If you are thinking about buying the A2, did you look at the Sabaj A30a?
appears to be the same Axign based design from (more or less) the same company just at half the price!
On the down side, the A30a is not half as nice looking as the A2 imho.
According to the manual, the VMV A2 has 16 EQ profiles, just like the A30a.The other day I became the owner of vmv a2. I was confused by some things.
1) The equalizer has many more profiles than the 8 listed in the device description. Maybe a new version? But there are no new versions on the official website
2) The pitch of changing the timbre of high and low frequencies changes by two divisions, not one at a time. Maybe someone has encountered this?
3) The serial number is listed on the product, but I did not find the same serial number on the box