In Cramer’s “Post Digital”, I can’t help but be reminded of the line of 14-year-olds inside of Urban Outfitters that I often see as I walk out of the Roosevelt Field Mall on Long Island. They’ll be carrying tshirts, dresses, quirky gifts, and occasionally large cardboard slabs donning album artwork from their favorite bands. What ensues between me and my friends is the following conversation: Why the hell do people purchase Vinyl?
- “The Audio Quality is superior”.
- Maybe. In reality, an Audio Engineer will have to release a specific copy of the audio, ‘mastered for vinyl’, in order for this to really be true. Nowadays, Audio Engineers just don’t do this.
- “Analog is better than Digital”
- Analog refers to those signals which are not quantized. Digital signals can be represented as discrete streams of 0s and 1s, whereas analog values draw their significance from continuous measurements over a potentially unbounded domain (in practice, this is usually a voltage between +0V and +5v). Analog to Digital Conversion (ADC), the process that allows us to capture audio and process it within our computers, involves
- choosing a domain for your analog signal (in most cases, this is specified as a bit-resolution “64bit audio”). This is the set of values that your audio can take on.
- choosing a sampling rate for your analog signal (a method to convert the continuous analog signal into discrete chunks for our computers. A common sampling rate for CD quality audio is 44.1 Khz (44,100 samples / second).
An often used comparison between Analog and Digital sources is the case of the Integral vs. the Riemann Sum — the Integral is continuous and captures all corners of the curve, whereas the Riemann Sum approximates reality in an attempt to make a computation tractable.
By this specification, you might think that Analog formats are inherently better suited to representing sound. You’re probably right — Continuous unbounded values give a better approximation of the universe, in my opinion, than discretized digital markings.
In practice, Digital audio formats perform very well. And often, audio is recorded to a lossless digital format, and then written to vinyl and uploaded to itunes. This means that, before the Vinyl was even given a shot, the critical detail with which analog supporters claim superiority is lost within the computer.
Consequently, the lossless audio formats available on the internet are more-or-less equivalent to their Vinyl counterparts, if the Vinyl was pressed from a digital copy. Unless you’re sure that your Vinyl was pressed directly from an Analog signal, you cannot be sure that you will receive any noticable difference in audio quality.