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"Why is the audio quality poor, or is it an issue on my end?"
The Nyquist-Shannon sampling theorem states that to accurately reproduce an analog signal, the sampling rate must be at least twice the highest frequency of the signal, which is why CD quality audio is typically sampled at 44.1 kHz.
The human ear can detect sound frequencies up to 20,000 Hz, but most audio compression algorithms discard frequencies above 16,000 Hz to reduce file size, affecting audio quality.
Psychoacoustics, the study of how our brains process sound, reveals that our brains fill in gaps in audio signals, making us less sensitive to compression artifacts, but this can still affect overall audio quality.
The Fletcher-Munson curve shows that human hearing is less sensitive to low frequencies, which is why many audio compression algorithms reduce bass frequencies to save space.
The dynamic range of human hearing is around 140 dB, making it difficult for audio systems to reproduce the full range of sounds, from whispers to loud explosions.
Distortion can occur when an audio signal is amplified beyond the capacity of the amplifier or speaker, causing the signal to "clip" and become distorted.
Digital audio signals can be affected by jitter, small variations in the clock speed of the digital signal, which can cause distortion and affect audio quality.
Audio data can be compressed using psychoacoustic models, which remove parts of the signal that are less important to human hearing, reducing file size at the cost of quality.
The frequency response of headphones or speakers affects audio quality, with some devices emphasizing certain frequencies over others.
Room acoustics play a significant role in audio quality, with reflective surfaces and echoes affecting the sound that reaches our ears.
The orientation of headphones on the listener's head can affect audio quality, with some headphones designed to compensate for this.
Digital audio files can contain errors due to bit rot, which can affect audio quality and introduce distortion.
The bit depth of an audio file, typically 16 or 24 bits, affects the dynamic range and overall quality of the audio.
Audio codecs, such as MP3, use lossy compression, which discards parts of the audio signal to reduce file size, affecting audio quality.
Analog-to-digital converters (ADCs) can introduce noise and distortion into digital audio signals, affecting audio quality, and high-quality ADCs are essential for maintaining audio quality.
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