ME and ChatGPT - some interesting, some funny dialogs I'd like to share
A pretty amazing machine that ChatGPT. Enjoy.
Can you tell me a sad good night story about an audiophile entering the audiophile heaven ?
ChatGPT:
Once there was an audiophile who lived a life filled with passion for music. He spent countless hours listening to his favorite records, testing different audio systems and tweaking them to perfection.
One day, he passed away and found himself at the gates of audiophile heaven. He was overjoyed to see that the place was filled with the most beautiful and perfect sound systems he could ever imagine.
As he walked through the halls, he noticed that no one was playing any music. He approached one of the angels and asked why. The angel replied that they were waiting for the perfect audiophile to come and bring the music to life.
The audiophile was filled with excitement as he realized that he was the one they were waiting for. He picked up a record and put it on the turntable, eager to hear the first notes of the music.
However, as soon as he dropped the needle onto the record, he heard a crackling sound. He quickly realized that his hearing was not what it used to be and he was no longer able to hear the music with the same clarity and perfection as before.
The audiophile was heartbroken as he realized that he could never fully enjoy the beautiful sound systems of audiophile heaven. He spent the rest of his days there, listening to the crackling sound, feeling sad that he could never experience the full beauty of the music again.
And so, the audiophile entered the audiophile heaven, but never truly found peace, as he was never able to fully immerse himself in the beauty of the music once again.
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Can you tell me a funny good night story about an audiophile entering the audiophile heaven ?
ChatGPT:
Sure! Here's a story:
An audiophile died and went to audiophile heaven. When he arrived, he was greeted by St. Peter who asked if he had any special requests. The audiophile replied, "Yes, I want to hear the most perfect sound in the universe."
St. Peter smiled and led the audiophile to a door. The audiophile opened the door and was greeted by the most beautiful music he had ever heard. The sound was so perfect that tears streamed down his face.
Suddenly, the audiophile realized that he was standing in front of a large speaker. He looked to his side and saw that there was a small speaker next to him. He looked back at St. Peter and asked, "What's this?"
St. Peter replied, "This is the auxiliary speaker. It's just in case you need to adjust the bass."
The audiophile smiled and said, "I never knew heaven had such good sound." And he settled in for an eternity of perfect sound.
The end! I hope you found this story amusing.
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Can you tell me a joke about a Golden Ear meeting an engineer talking about the latest greatest digital analog converter (DAC) ?
ChatGPT:
Sure! Here's a joke for you:
A Golden Ear walks into a room where an engineer is talking about the latest greatest digital analog converter (DAC). The Golden Ear interrupts and says, "Excuse me, but I have a highly refined sense of hearing and I can tell you that this DAC is the best one I've ever heard." The engineer raises an eyebrow and says, "Really? How can you tell?" The Golden Ear replies, "I can just hear the difference, it's obvious." The engineer then asks, "Well, can you tell me the difference between this DAC and a cheaper one?" The Golden Ear thinks for a moment and then says, "Well, um, the price is definitely different."
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Let's try something different
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The Topping D90 is a high-end DAC that boasts a powerful XMOS XU208 chip and supports a wide range of file formats, including PCM, DSD, and MQA. It has a built-in amplifier and supports up to 32-bit/384kHz audio playback. It also has a sleek, compact design and multiple connectivity options, including USB, coaxial, and optical inputs.
The SMSL SU-9 is also a high-quality DAC that uses the same Sabre Hi-Fi 9038 Pro chip as the Topping D90. It supports up to 32-bit/384kHz audio playback and offers both coaxial and optical inputs, as well as a USB input that supports both USB Audio Class 2.0 and DoP (DSD over PCM). The SU-9 also has a compact design and a built-in amplifier.
Both the Topping D90 and the SMSL SU-9 are highly rated for their sound quality and build quality. However, some users might prefer the Topping D90 for its wider file format support and its more versatile connectivity options, while others might prefer the SMSL SU-9 for its slightly more affordable price and its use of the same Sabre Hi-Fi 9038 Pro chip as the D90. Ultimately, both are excellent choices for anyone looking for a high-quality DAC.
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ME:
What means SNR, THD+N, DNR in the audio world ?
ChatGPT:
SNR stands for Signal-to-Noise Ratio, which is a measure of the ratio of the desired signal to the background noise in an audio system.
THD+N stands for Total Harmonic Distortion plus Noise, which is a measure of the total amount of harmonic distortion and noise present in an audio system, expressed as a percentage of the signal amplitude.
DNR stands for Dynamic Range, which is a measure of the difference between the highest and lowest levels of an audio signal that can be recorded or played back without introducing unwanted distortion or noise.
ME:
What is SINAD ?
ChatGPT:
SINAD stands for Signal-to-Noise and Distortion Ratio, which is a measurement of the quality of an audio signal. It is calculated as the ratio of the desired signal level to the sum of all other electrical noise and distortion present in the signal. SINAD is expressed in decibels (dB) and is used as a figure of merit to assess the performance of an audio system, such as an amplifier or ADC (analog-to-digital converter). The higher the SINAD value, the higher the quality of the audio signal, as there is less noise and distortion present in the signal.
ME:
What is jitter and phase noise and how is it measured ?
ChatGPT:
Jitter and phase noise are types of noise that can occur in digital signals, particularly in clocks that drive digital circuits.
Jitter refers to the small variations in the arrival time of consecutive clock pulses. This variability can cause problems in digital circuits, as it can result in incorrect data recovery and decreased system performance.
Phase noise is a type of jitter that refers to the short-term fluctuations in the phase of a clock signal. Phase noise is particularly important in applications that require high-frequency signals, such as high-speed digital communication systems and frequency synthesizers.
Both jitter and phase noise can be measured using various techniques, including:
Time interval error (TIE) measurement, which measures the deviation of individual clock pulses from a ideal clock waveform.
Allan deviation measurement, which measures the stability of a clock signal over time.
Phase noise measurement, which measures the spectral density of phase fluctuations as a function of frequency offset from the carrier frequency.
The unit of measurement for jitter and phase noise is usually expressed in picoseconds (ps) or hertz (Hz). Lower values indicate lower jitter and phase noise, which results in better signal quality.
ME:
Which level of jitter in picoseconds is considered to still be audible?
ChatGPT:
The level of jitter that is considered to be audible is a subject of ongoing research and debate in the audio industry. However, most experts agree that jitter levels below 1 nanosecond (ns) are generally inaudible to the average listener. Some studies have suggested that jitter levels as high as 10 ns can still result in audible effects, while others have shown that jitter levels as low as a few picoseconds can be audible in certain circumstances.
It's important to note that the audibility of jitter is highly dependent on the specific audio system, as well as the listener's own perception and listening conditions. In general, high-end audio systems that use high-quality clock sources and minimize jitter are less likely to produce audible jitter-related effects.
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That's it for now. IMO a pretty good start.
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