I'm happy to keep the thread open but let's concentrate as we seem to be doing on new facts and explorations rather than going over old ground.
With multibit dac the noise floor is constant wathever level. With delta sigma the noise floor is not constant and performs almost equally good with low level and high level signals. Usually noise floor is lower on delta sigma also. Do you think we can be sensitive to this variarion of the noise floor? (That is not present on the recording) . Maybe we cannot hear it?You can get more than 16bit precision from dithered 16bit input (I think, somebody else chime in please).
Not sure if I've posted it here (I think so), I created a 24 bit file with -110 db tone. Saved it to undithered 16 bit and dithered. The tone was missing in the undithered file and present in the dithered file.You can get more than 16bit precision from dithered 16bit input (I think, somebody else chime in please).
With multibit dac the noise floor is constant wathever level. With delta sigma the noise floor is not constant and performs almost equally good with low level and high level signals. Usually noise floor is lower on delta sigma also. Do you think we can be sensitive to this variarion of the noise floor? (That is not present on the recording) . Maybe we cannot hear it?
Your first two sentences are incorrect. What you are describing is noise floor modulation. It may or may not be present in either type of DAC. If the modulated noise is high enough it could be heard. Usually it's not.With multibit dac the noise floor is constant wathever level. With delta sigma the noise floor is not constant and performs almost equally good with low level and high level signals. Usually noise floor is lower on delta sigma also. Do you think we can be sensitive to this variarion of the noise floor? (That is not present on the recording) . Maybe we cannot hear it?
It was present a -110db? That means that to decode properly dithered signal we need a dac that can deal with it. A multibit 16 bit dac would give bad level for this tone because cannot do better than 96 db. So what matters is to decode perfectly reverse way as it's encoded.Not sure if I've posted it here (I think so), I created a 24 bit file with -110 db tone. Saved it to undithered 16 bit and dithered. The tone was missing in the undithered file and present in the dithered file.
With multibit dac the noise floor is constant wathever level. With delta sigma the noise floor is not constant and performs almost equally good with low level and high level signals. Usually noise floor is lower on delta sigma also. Do you think we can be sensitive to this variarion of the noise floor? (That is not present on the recording) . Maybe we cannot hear it?
No with with dither a 16 bit DAC could do the same. That was the point of the comment earlier about dither. Dither reduces quantization noise and distortion. Plus allowing signals to be encoded in the noise floor below the smallest bit.It was present a -110db? That means that to decode properly dithered signal we need a dac that can deal with it. A multibit 16 bit dac would give bad level for this tone because cannot do better than 96 db. So what matters is to decode perfectly reverse way as it's encoded.
Usually delta sigma.Do adc used to record on studio or to master analog records are usually multibit or delta sigma?
Do adc used to record on studio or to master analog records are usually multibit or delta sigma?
Not sure if I've posted it here (I think so), I created a 24 bit file with -110 db tone. Saved it to undithered 16 bit and dithered. The tone was missing in the undithered file and present in the dithered file.
Was indeed my DAC1.I suspect Alan's DAC1 but I may be wrong about that as well.
Have a look at the linearity plots made by Amir of R2R and DS DAC's.
About the soundtype
- Do you know any technical reasons of these differences of naturallness of sound
- To akm the first filter wich is like non oversampling is the most natural
Then shall we conclude that this'is only Marketting?
It seams that for a specialised compagny like akm there exists advantages of non oversampling and that choice of filtering is a trade off between frequency response and naturallness of sound.