Phil1624705739 Posted July 19, 2002 Posted July 19, 2002 yeah,... the chain is only as strong as the weakest link. A mellow cable will tame bright sytems, but bright cables will wreck havoc. Burning in cables is a time process.I'm sure its a combination of the magnetic alignment of electrons, the EM interaction of the conductor, dielectric and shield, and the eventual oxidation of the copper/silver conductor. Best way to burn in cables? Use them..... Just like the best way to season shoes is to wear them. ;) Jag... u an electronic engineer?? Phewwweee... electrons & dielectric.. reminds me of my poly days.. hahaha.. Phil
Jag Posted July 19, 2002 Posted July 19, 2002 Haha,... me grad from SP in June 97. Char-bors there either very innocent or very lian. Hi-fi oso expensive. That time, still studying, kena pay so much for cables, dunno whether kena conned oso. Today, after some experience in pro-audio, knowldege gained in electromagnetic propagation and lots of test equipment at my work place..... can play with cables that work up to 10GHz all day. (Boring) Me working on some R&D on RF signal propagation in optical, wired and wireless medium for hi-def transmission.
Phil1624705739 Posted July 19, 2002 Posted July 19, 2002 Haha,... me grad from SP in June 97. Char-bors there either very innocent or very lian. Hi-fi oso expensive. That time, still studying, kena pay so much for cables, dunno whether kena conned oso. Today, after some experience in pro-audio, knowldege gained in electromagnetic propagation and lots of test equipment at my work place..... can play with cables that work up to 10GHz all day. (Boring) Me working on some R&D on RF signal propagation in optical, wired and wireless medium for hi-def transmission. Hmmm... let me guess.. u working in ST??? Phil
fourier Posted July 19, 2002 Posted July 19, 2002 yeah,... the chain is only as strong as the weakest link. A mellow cable will tame bright sytems, but bright cables will wreck havoc. Burning in cables is a time process.I'm sure its a combination of the magnetic alignment of electrons, the EM interaction of the conductor, dielectric and shield, and the eventual oxidation of the copper/silver conductor. Best way to burn in cables? Use them..... Just like the best way to season shoes is to wear them. ;) Getting really interesting if the above refers to DIGITAL transmission. Seems that the "bright" or "clinical" sound is due to perfect or near perfect transmission with error corrected. ( what we are trying to achieve ). And the "mellow" sound is due to imperfect and errorneous transmission, and after reconstructing back the signal, it losses some high frequencies. So, we may not want perfect transmission. :) But that depends on the error correcting mechanism of your system. Could be a standard for new coding like AC3/DTS, but free for all for PCM. Wow.
Jag Posted July 19, 2002 Posted July 19, 2002 Nah, not working for ST. I find the notion of "we may not want perfect transmission" somewhat flawed. AFAIK, engineers have always strived to attain perfect transmission since the telephone was invented. Today, we still are trying to achieve perfect tx. Being bright or mellow does not immediately be the result of transmission errors. Rather, it how the system reacts to transmission JITTER. While PCM CD audio uses Reed-Solomon forward error correction, transmission errors are not immediately noticable to 99% of the users. Its a really clever technique that actually minimises bursty errors. If there are indeed uncorrectable errors, the error correction algorithm will interpolate the data and hopefully extract some useful information. By intentionally having a poor transmission medium, its not very helpful in getting any sort of audio at all. Drop-outs, audio squeeks and noise is all we'll get. Having bright sound doesn't translate to error-free transmission. It simply means that the system is underdamped and some high-frequency distortion or ringing is taking place. Likewise for mellow sounds, its likely the system has got uneven frequency response. PCM is a simple audio format with a robust error correction algorithm. DTS/AC3 is even more fragile given their low bitrate allowed for mulit-channel audio. Digital cables are state of the art cables really. They must be able to transmit all frequency components of the signal. If capacitance is too high, low frequency components get over attenuated. If dielectric constant is too high, group delay will increase. In summary, we want a 100% error free transmission channel for any type of communications. How much the cable brightness or mellows the analog signal, it depends on the listener. As for digital, we want a flat frequency response to as high as possible.
fourier Posted July 19, 2002 Posted July 19, 2002 <stuff deleted> In summary, we want a 100% error free transmission channel for any type of communications. How much the cable brightness or mellows the analog signal, it depends on the listener. As for digital, we want a flat frequency response to as high as possible. Fully agree. I was a little confused, excited, and amazed, when encountered "breaking in" by oxidation, and having cables changing the tone. I guess you're referring to analog signal, and not digital signal. cheers
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