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About LongtimeListener

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  1. God thanks, I am not crazy 😂 as some here think 😃. I have seen many times sound differences in digital hardware where I also came from the sceptical side of things that 1 and 0 should sound all the same, but they don't. I suspect jitter to be the culprit and why a different brand of SD Cards can make it better or worse, I don't know. There is the possibility to boot the OS on a RPI from a hard disk ignoring the SD Card. I will check out this and hope to see a difference in the sound quality.
  2. Hi All, I have the impression that the brand of the SD Card used makes the Raspberry Pi sound different. Now I came across that topic on the Volumio Website. https://forum.volumio.org/brand-card-used-makes-difference-music-quality-t13351.html What is your thought about this?
  3. Confirm now works great. I had to switch off the hardware mixer in volumio but now the sound is breathtaking good... Thanks again
  4. Hi Music2496, thanks for your advice. Yes, thought so but wasn't quite sure. Will try this... Cheers
  5. Hi All, just wondering whether a i2s DAC (Allo Boss sitting on a raspberry pi) is able to be connected directly to my Musical Fidelity X-Can V3 headphone amplifier. Usually you have to go through a proper amplifiers tape connection with it. Thanks in advance Cheers
  6. I agree to have some concert hall acoustics recorded. If the echo time is too long it starts to 'smear' the sound together like you would in a painting when all the colours run off and mix together making the painting unrecognisable. Like in a that painting were eg the red has to stay exactly where it should be to complement the eg blue beside it, the violin sound has to keep its characteristic to complement the clarinet beside it. Mostly this is achieved by placing microphones above those instrument groups and mix it carefully. With the SACD multichannel my assumption is that they are trying to catch the concert hall sound first. This is a honourable approach but unfortunately leaves out the fact that a person in a live concert can focus on certain instruments which amplifies the experience of those, they appear more intense to the listener (like focussing on a certain colour in a painting), while in a reproduction of a recording we only get what the unbiased microphone has recorded. And then we get the room acoustics of the listener interfering as well. You deal in essence with two echoes, the room where the recording was done and the your room at home. The lower the echo (but not too dry) in the recording room, the less it interferes with your listening room at home. In the end it comes down to proper recording of the instrument groups in a little bit of room echo, then proper mixing of those groups to create the composite sound the composer intended and also to create the depth of the sound stage. Just catching the sound in the concert hall might work for multi channel but not for 2 channel stereo.
  7. True, but I think my observations are related to those multi channel recordings...
  8. Hi everybody, I can"t help it but I find that SACD recordings sound strange on a stereo 2 channel system. I am talking here of classical recordings. The sound is recorded somehow with too much room. The room acoustics are over-represented. That makes an impression as if the listener is standing at the door of the concert hall grasping only part of the music information. The mid and higher range is horrible under represented. The sound character of the woodwinds, metal or violins is hardly to distinguish. In addition to hear them properly you have to turn up the volume which then in high dynamic sections over-represent the bass which also comes across muddled. It is just a big mess. I blame the over-representation of the room acoustics which probably sounds great in a 5 channel system, but somehow sampling it down to the 2 channel signals a lot of information must go lost... I for my part will avoid anything with the SACD logo from now... Cheers
  9. They do, indeed. Ok, my lesson learned here 😊: Beware of DSD recordings, the SACD label is an indicator, go for the 48/24 if in doubt 😉. Thanks for clarifying, I am a much more conscious shopper in the future...
  10. Thanks Grant for the well written opinion. I do very much appreciate opinions as I like a good debate as it helps to gain knowledge myself and deeper understanding. An yes, I would not spend money on equipement re-producing outside 20Hz to 20Khz but it is still an interesting subject to watch. I also have excellent CD recordings which pale a bad high resolution recording as the sound engineer was not willing or able to catch the sound well. I find classical music is especially difficult as the room, the different instrument groups and the composite sound is hard to record. Composite sound means a melody/theme very often is created by mixing the instrument groups in expression, rhythm and dynamics like colours together to make the melody/theme appear. If the sound engineer in not able to catch this through various reasons, the whole piece falls apart even to a stage that it is un-listenable. A problem that even exists when you go to a live concert and the conductor looses the control over the orchestra. As a side note, this is the reason you need a good sound system to get hooked on the sound scape of classical music. I looked into other 192/24 files I have and they do not have that 0 an1 waste noise. So it must be possible to produce those resolution without them. They have some data (music or noise) above 20kHz, but not such a huge amount like the recording in question. If think, after what I have learned here, I will go only after 48/24 files now maximum. CD quality files will be checked on arrival for those dynamic range issues decribed above. For the rest I just will sit down and enjoy the music. To be honest, it is just amzinng how perfect sound can be re-produced nowadays and being able to be part of it as listener is a real gift. Thanks and cheers
  11. Good to have such sophisticated, knowledgeable enthusiasts here in the forum 🙂 No, I cannot hear it. It must be a hazard for animals like dogs and cats, really, who are able to hear it. What I dislike about it is that it takes resources from the sound system which has no purpose at all. It is passed through to the amplifier and played into my living room through my speakers. We don't know to what extent, though. Will my tweeter get damaged, we don't know. The file size is large, here 3.8 Gigabyte for all 5 files, just to contain a huge load of unnecessary 0 and 1 noise, that will cost me downloading money. I never intended to buy that unnecessary noise contained in the files that has nothing to do with the data (music) I wanted to buy only the music was advertised, and it was not stated in the product description that it will have that noise as a by-product, Therefore, I consider this as a faulty product. Now, to open another can of worms which will probably bring in the vinyl enthusiasts. Link -> It is the world of overtones and it's effect on the sound and character of a tone. <- Link. It can be discussed that even non-audible overtones have an influence on the audible sounds and change their character. Under that view the 0 and 1 garbage noise discovered in those files could have a complete new unpleasant effect, indeed. Link -> Even more food for thought <- Link Link -> Article to the fact that instruments emit overtones in the ultrasound spectrum <- Link Link -> More about this here <- Link
  12. Yep, have done this and am about to listen to them to check them out. So far the 0 and 1 garbage noise is gone and the sound is still very good. Still waiting for the final message from the channel classic engineer Jared what he can do about this. I would prefer the cleaned up files from him if possible Anyway, thanks for the hint. You seem to know that stuff pretty well. Are you doing this as a profession? Cheers
  13. Thanks, will give it a try. I have seen that Audacity has a low pass filter which seems to get rid of the noise when I set it to 22kHz. Cheers and thanks
  14. Thanks Grant for your information here, it really helps me to understand what's going on. I have plotted the first 50 sec of frequency spectrum of the track 4. I also added the picture of the track 4. As you can see it is a low dynamic music and it is completely covered by the noise. There is hardly any music information to see... Now to the frequency spectrum: There is minimal noise below 20kHz, however it goes up quickly to 66db at 50kHz. Does that mean this is passed through to the amplifier and then re-produced into my living room? Thanks in advance for your opinion.
  15. Jared, the sound engineer responded to the case 4. It is a high pitch noise caused by the first generation of DSD recorders. I really opened a can of worms for me with that DSD recording thingy. Oh man, always me asking stupid questions and getting into trouble... Now, when you look at the data sheet of my DAC below: As far I understand this: DSD direct it cut off at 20kHz by the DAC itself which makes sense when we want to eliminate the high pitch noise, therefore the amplifier and the speakers never see it BUT!!! FLACS produced from that DSD recording still have that noise in the FLAC and therefore pass it through as the DAC applies NO 20kHz filter to it but reproduces the high pitch noise up to 96kHZ, therefore blasts us with in-audible high pitch noise during the listening sessions. The noise level is VERY high. This would be bad news indeed and damaging to our sound system especially the tweeter.
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